Re: [CentOS] cluster ssh edit file with vi slow

[J Martin Rushton via CentOS]

Hi Ralf,

That's not something I'd normally consider doing.  Is it possible for
you to edit just the local file and then use scp to distribute it?  OK,
you lose the cluster-wide mechanism but it woul be possible to set up a
small script to bang off the copies in the background.

Martin
On Wed, 2021-11-24 at 09:02 +0100, Ralf Prengel wrote:
> Hallo,
> has anyone a hint:
> I have 35 centos systems configured to be managed using clusterssh.
> Everythings works fine until I try to edit a file using vi on these
> 35  
> Systems.
> The connections to all targets becomes slow and unusable for
> minutes  
> until the change  in the file is done.
> Calling commandos like ls -l is reacts fast.
> DNS in the network isn't  fast but working.
> 
> Has anyone a hint for me?
> 
> Thanks
> Ralf
> 
> 
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Re: [CentOS] Unexpected /etc/resolv.conf updates on CentOS 7

[J Martin Rushton via CentOS]

If you just want to tell NM to clear off and leave your resolv.conf 
alone do the following:


If you don't want it to touch the contents of the file then remove all 
DNSx= parameters from all ifcfg files and add PEERDNS=“no” instead. Now 
you are solely responsible for setting the content of /etc/resolv.conf 
yourself.


You may also have to edit /etc/NetworkManager/NetworkManager.conf and 
add dns=none to the [main] section.


On 13/10/2021 18:24, Toralf Lund wrote:

Hi

Does here anyone know exactly when NetworkManager creates or is supposed 
to create /etc/resolv.conf for a network connection? Is there a way I 
can control it, or alternatively, is there a good way to debug the 
functionality?


I thought that there would simply be an update whenever a connection was 
established, and an addresses/network info was received (if using DHCP), 
and that the information would pretty much be left alone after that. 
However, I've lately found that a new file gets written every few hours 
even though there is no connection change (that I can detect), i.e. the 
same link is up all along. Does anyone have any ideas why that might 
happen? I thought at first that the updates could be linked to DHCP 
lease renewal, but on closer inspection, that does not seem to be the 
case. I don't see anything in the system log related to networking at 
the points where a new file gets written.


I get the above behaviour for my home Wifi net. It seemed to start after 
I switched to a new router, but that might be coincidental. It's a 
problem for me because I'm also using "commercial" VPN software (not 
integrated with NetworkManager) that will create it's own resolv.conf 
file; it replaces data e.g. from Network Manager when VPN is enabled, 
and restores it on disable. If NetworkManager "refreshes" the 
information in the mean time, the DNS config for VPN is lost, and the 
link doesn't work as expected...


This is on a CentOS 7 system with all the latest updates.

- Toralf

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Re: [CentOS] Upgrading CentOS from 7 to 8

[J Martin Rushton via CentOS]

It's not supported.  RH has a method that sometimes works for RHEL, but 
there is no safe CentOS way to do a major upgrade.  You need to 
reinstall the OS and migrate your applications.



On 29/09/2021 14:24, Gestió Servidors wrote:

Hi,

I'm doing some tests of upgrading CentOS from 7 to 8 reading this step-by-step 
guide: 
https://netshopisp.medium.com/how-to-upgrade-linux-servecentos-7-to-centos-8-ec2db96a189b

I'm trying this upgrade in a VM, so I can save "snapshots" and restart in a past saved 
point. However, all my test ends wrong, exacly in Step 4 when I run "rpm -e `rpm -q 
kernel`". Then, systems says that some packages are kernel dependencies. After I remove that 
dependencies, I can't remove kernel...

Anybody has tested process upgrade from 7 to 8?

Thanks.

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Re: [CentOS] external USB drives, strange result on reawaking

[J Martin Rushton via CentOS]

I'm sorry but I've moved away from Amanda so can't help.  However one 
thing that your description does imply is that you keep the drives in 
the enclosure next to the machine.  Unless you have some other mechanism 
for taking a remote backup, this is a bad idea.  consider the aftermath 
of a fire, theft, electrical malfunction or virus infection.  Adjacent 
drives may have either disappeared, melted, had their interfaces ruined 
or been corrupted.  In any case, quite possible no use as backups.


Best practice is to ensure that periodically a good backup (equivalent 
of a level 0) is taken and stored offsite.  For domestic users that 
might be stored in a safe elsewhere, but offsite is the ideal.


Sorry to nag, but better to act now than when you are faced with a new 
insurance replacement and no useable backup.


Martin.

On 18/09/2021 08:05, Jon LaBadie wrote:

My backup system (using amanda) stores its data on external
drives in a single 4 bay USB enclosure.  As these drives
are only needed during backup or recovery operations I have
used hdparm to enable them go to an idle state after a period
of inactivity.

If I attempt to access any of the data when the drives are
sleeping I get a strange result.  Suppose I try to list
one of the mountpoints, "ls .../D2", there is the expected
delay while the 4 drives spin up and then ls completes with
no output.

I know each of the 4 drives has 40 subdirectories under the
mount point.  And each of the 3 other reawakened drive lists
properly.  But the directory I used to awaken the drives
lists as empty.

This effect is not limited to inititally listing a mount point.
Had my command been "ls .../D2/DS1-044", DS1-044 would appear
empty, but DS1-043 and all other similar directories list
properly.

Further, if I attempt to access a file I know exists in DS1-044
by its explicit name, that succeeds.  It is like having execute
permission, but not read permission on the directory.

If I unmount and re-mount the filesystem, all is normal.

Any clues as to why this happens, or ways to make the invisible
visable again without the unmount/mount sequence?

Jon



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[CentOS] Folio Infobase

[J Martin Rushton via CentOS]

Does anyone know any way to read .nfo files from Folio infobases.  The 
best suggestion I've seen so far is to run up a VM with Windows 98 on 
it, does anyone know where I can get a copy of that!


BTW, these are not the .nfo files used to describe scenes.

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Re: [CentOS] Difference between CentOS Linux and CentOS Stream

[J Martin Rushton via CentOS]

Judging from the dates on /etc/*release Alma dropped on May 26.  Also 
been solid.


On 19/07/2021 21:26, Antonio Leding wrote:
FWIW, Rocky Linux dropped GA v8.4 on Jun 21st and has been really stable 
for me thus far.  For those not aware, Rocky is based on RHEL and has 
the primary goal to be a CentOS replacement.


Also has solid sponsors - AWS, Microsoft, & Google…

- - -

On 19 Jul 2021, at 12:17, Antonis Kopsaftis wrote:


Hello,

Even if centos stream 8 is pretty stable for production usage his eol 
date is until 2024 (same as centos 7).
In the following 2 years i will have to migrate my centos 7 servers to 
something newer. I can choose a distro with the same eol date.

I need a distro which much more long eol date.

Finally i choose to trust the oracle developers who maintain the 
oracle linux (based on rhel source packages).
In the future i will also try the almalinux distro (maintained by 
cloudlinux).


Regards,
Antonis Kopsaftis



On 19/7/2021 9:58 μ.μ., Johnny Hughes wrote:

On 7/19/21 12:59 PM, Antonis Kopsaftis wrote:

Hello,

Check https://wiki.centos.org/About/Product to find the EOL dates for
each version of Centos.

To my opinion the only centos version that is anymore appropriate for
production usage is version 7. Centos 8 is production ready but the eol
date is only a few months away.

I choosed to migrate my centos 8 machines to oracle linux 8 for
production usage, but many more distros have appeared (almalinux,
rockylinux, springdale linux, etc). All of them follow the EOL dates 
for

RHEL 8.x ( May 2029) and are build from the sources packaes of RHEL.


You are entitled to your opinion :D // but, IMHO ..

If you are not doing anything special with the kernel, then there is
very little difference between CentOS Stream and CentOS Linux.

I would surely rather trust the 1500 RHEL developers who are maintaining
CentOS Stream than anyone else .. but that is just my opinion.


Regard,
Antonis Kopsaftis

On 19/7/2021 7:01 μ.μ., Kaushal Shriyan wrote:

Hi,

I am confused between CentOS Linux and CentOS Stream as per
https://www.centos.org/download/. Please guide me on which one I 
need to
use in the production environment. Is there a difference between 
CentOS

Linux and CentOS Stream?

Thanks in advance and I look forward to hearing from you.

Best Regards,

Kaushal
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 . . Network Operation Center . .
 . . University of West Attica - www.uniwa.gr . .
 . . (ex Technological Educational Institute of Athens)   . .
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Re: [CentOS] Auditing all Linux clients with centralised server

[J Martin Rushton via CentOS]

A cut-and-paste from my Wiki:

---%<

Remote logging

Auditing, particularly from compute nodes, may be centralised to reduce 
the number of files needed to get a view of the cluster.

Server

The server machine must be configured to accept messages and must have a 
large enough logging area to store the records.


The server listens on port 60. Configure this as tcp_listen_port in 
/etc/audit/auditd.conf.


The server must only accept messages from a privileged port. If this is 
not done any userland process could inject nefarious messages. It is 
safe to configure the server to accept messages from any privileged 
port: tcp_client_ports=1-1023 in /etc/audit/auditd.conf.


On the server increase tcp_listen_queue to 16 to ensure enough requests 
for connections can be handled during a power-on bootup.


You will need to restart the daemon for these changes to come into effect.

Clients

The client machines may either forward messages at once or else batch 
them up in a queue. Generally machines with local storage should use the 
queue which preserves the log in the event of a crash.


You will need to restart the daemon for all these changes to come into 
effect: systemctl restart auditd.


Ensure the appropriate software and configuration is loaded: # yum 
install audisp-remote.

/etc/audisp/audisp-remote.conf

The client needs to know where, and to which port to send messages. As 
mentioned above, the client must send from a privileged port.


remote_server=
port=60
local_port=61

On diskless clients set mode=immediate, on other clients set 
mode=forward. Accept the defaults for queue_file and queue_depth.

/etc/audisp/plugins.d/au-remote.conf

By default the dispatcher is configured off, therefore remember to set

active=yes

to turn on the remote logging.

/etc/audit/auditd.conf

Once you are happy with the logging, turn off the local copy. For CentOS 
C7.3 and later machines use:


local_events = no
log_format = RAW

--%<

I have not tested this recently, it was last running (IIRC) on C6/7, so 
proceed with caution.


Regards,
Martin



On 09/07/2021 08:08, Kaushal Shriyan wrote:

Hi,

I have 20 Linux servers in the network. Is there a way to audit all Linux
clients using a centralized server? For example, what commands are run by
John on Linuxnode1? Steve on Linuxnode15? and so on and so forth to
track user activity. Which files have been modified or edited or commands
etc.. by the users.

I have installed auditd, but it is local to the Linux server.
Thanks in advance.

Best Regards,

Kaushal
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Re: [CentOS] Centos versions in the future?

[J Martin Rushton via CentOS]

On 09/07/2021 07:13, Nicolas Kovacs wrote:

Le 08/07/2021 à 22:53, mario juliano grande-balletta a écrit :

I'm an idealist, there is no way in hell I would ever accept anything
from Amazon or Microsoft


I started with Linux back in 2001, the year where Microsoft CEO Steve Ballmer
called Linux "a cancer that attaches itself to intellectual property", so my
views on Microsoft are about the same as yours.

This being said, things have changed, and Microsoft is now - amongst other
things - the most important contributor to the Linux kernel in sheer terms of
lines of code.

Cheers,

Niki


Embrace, extend, and extinguish.
https://en.wikipedia.org/wiki/Embrace,_extend,_and_extinguish

Remember the leopard never changes his spots.

Martin

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Re: [CentOS] Centos versions in the future?

[J Martin Rushton via CentOS]

On 07/07/2021 13:41, Leon Fauster via CentOS wrote:

On 07.07.21 14:31, J Martin Rushton via CentOS wrote:

Fashion, and Oracle's past practices.  I evaluated
 Alma Linux
 Fedora
 Mint
 Open SuSE
 Oracle Linux
 Springdale Linux
and settled on Alma.  Rocky was still vapourware when Alma was stable. 
I've seen how Oracle promise no change in the long term, then change 
their charging model in the past.  We got badly burned at work when 
they took over DEC RDB.


I like Alma's independence built on Cloud's experience over many years 
building RHEL clones.




Here is another one:

https://navylinux.org/

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I hadn't seen that one, but I do notice that it aims to be "minimalist" 
whereas my main machine is the network server (DNS, DHCP etc), a server 
(Wiki, Cloud, storage) and my workstation.


BTW, anyone know who the "Navy Foundation" are?  Is this an arm of the 
US government?


Martin

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Re: [CentOS] Centos versions in the future?

[J Martin Rushton via CentOS]

Fashion, and Oracle's past practices.  I evaluated
Alma Linux
Fedora
Mint
Open SuSE
Oracle Linux
Springdale Linux
and settled on Alma.  Rocky was still vapourware when Alma was stable. 
I've seen how Oracle promise no change in the long term, then change 
their charging model in the past.  We got badly burned at work when they 
took over DEC RDB.


I like Alma's independence built on Cloud's experience over many years 
building RHEL clones.


Just my 2d worth.

On 07/07/2021 13:18, Nicolas Kovacs wrote:

Le 07/07/2021 à 11:44, Nikolaos Milas a écrit :

RESF / Rocky Linux is gaining worldwide recognition and sets itself as the
primary organization / platform to become the CentOS 8 heir / successor in the
future.


Rocky Linux is the New Kid On The Block and gets all the attention.

Whereas Oracle Linux (the best RHEL clone in terms of maintenance reactivity)
has been around since 2006, free as in beer since 2012, and nobody wants to
touch it.

Go figure.



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Re: [CentOS] Centos versions in the future?

[J Martin Rushton via CentOS]

There's also Alma, which is where I've gone after being with CentOS 
since 5.3


On 07/07/2021 10:44, Nikolaos Milas wrote:

On 30/4/2021 7:27 μ.μ., Gionatan Danti wrote:



The correct answer is to buy RH: fine. But do not let Stream touch 
anything which require a kABI compatible modules. As said above, the 
Stream move is squarely addresses *cloud* vendor requests and needs. 
Again, fine. But please leave apart the RH comparison, this is not 
going to help Stream.


Again, don't let me wrong: I wishes the best to Stream, and I will use 
it where appropriate. But "where" is much smaller today than 
yesterday. But this aside, I really thank you all CentOS maintainer 
for your monumental work, and I really hope Stream will be a success. 


I re-visit this thread, since it is crucial for CentOS 8 users.

RESF / Rocky Linux is gaining worldwide recognition and sets itself as 
the primary organization / platform to become the CentOS 8 heir / 
successor in the future.


Google and Microsoft become RESF sponsors/partners:

    https://rockylinux.org/news/community-update-june-2021/

And so IBM/RH lose the tremendous advantage they had by owning the 
CentOS project, which - it seems - never evaluated correctly.


 From now on, it is clear that hundreds of thousands of CentOS 
installations will be migrating to Rocky Linux.


I also wish the best of success to CentOS Stream, but this is not what 
the CentOS community expected.


My 2c.
Nick

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Re: [CentOS] non-functioning printer

[J Martin Rushton via CentOS]

On 15/05/2021 14:27, Valeri Galtsev wrote:




On May 15, 2021, at 5:22 AM, Robert Heller  wrote:





HP printers are bitchy about using non-HP branded ink carts (or tonor carts).
HP is very interested in extracting their "pound of flesh" for all eternity.



They are not the worst I’ve seen. We have a bunch of HP laser printers, and 
though used HP supplies originally, do use “aftermarket” ones for multiple 
years.

Who are really bad are Xerox. Even though I agree that they “taught the world 
how to copy”, at some point I dropped them, and wherever my word counts I 
recommend against Xerox. At some point they started making slight modifications 
to printer models thus making pretty much the same printers only with toners 
incompatible between models. Thus, each “model” was produced in smaller number, 
making aftermarket toner manufacturing unprofitable. That was only half of 
trouble, we were buying Xerox supplies anyway. But at some point they stopped 
making toners for printers as young as 6 years old if memory serves me. So, we 
had to throw away good working Xerox printers merely 6 years old, as you can 
not get toners for them. They, BTW, didn’t fix vulnerability in these older 
printers as well.

Since that event my decision is: NO XEROX ANYTHING!

For comparison: we had; still have HP 4050 that was getting a lot of use and 
beating it is 19 years old now, still works, you still can buy HP toner for 
that.

So, I really would place HP (printers department) into really good guys. (Not 
HP / compaq laptop department, though I didn’t check their laptops recently)

Just my $0.02.

Valeri



I bought an HP multifunction machine (M281fdw) some years ago.  At first 
it worked fine with aftermarket supplies, but following a firmware 
"upgrade"* it refused to work with the third party supplies.  I have 
unusable, full, large black + 3 colour cartridges.  To be fair, in other 
respects the mfp is fine and plays well with Linux, unlike some other 
manufacturers.  Just budget for buying expensive HP supplies.


Martin

*Official description, not what I called it!



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Re: [CentOS] Centos versions in the future?

[J Martin Rushton via CentOS]

Not just rumours.  CentOS 8 dies at the end of this year.  CentOS 7 has 
until the end of 2024.  RH are introducing "CentOS Stream" which is what 
will be in RHEL in the next release.  It has been unkindly referred to 
as beta software.


The traditional rebuild of RHEL will continue under other guises.  There 
has been a long standing release at Springdale.  Since RH's announcement 
Cloud have produced the Alma release.  There is also a new project 
called Rocky that hasn't yet released a full version but is working on it.


On 27/04/2021 13:46, Carlos Oliva wrote:
Will there be newer versions of Centos? We have heard rumors that 
version 8 will be the last one. We are concerned with using an OS that 
will loose support in the future. Thank you.


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Re: [CentOS] almalinux?

[J Martin Rushton via CentOS]

I installed the beta when it came out on a VM running under C7.  I 
upgrade every day or two and Alma upgrades have so far been seamless. 
It's transited from beta to RC and now to stable.


I installed the RC on a USB stick to allow me to run as bare metal on a 
laptop (which unfortunately has to remain as Win10).  It ran fine until 
the upgrade to stable, but then corrupted the image during the upgrade. 
I reinstalled and it seems to be running fine.


I've been trialing Springdale as well (as a VM).

Requirements are:
OwnCloud
DokuWiki
Zotero
DNS slave, eventual master
DHCP server
NFS server
Thunderbird
Firefox
KeePass
OpenOffice
FreeCAD
Octave
Lilypond and Frescobaldi
Compilers: GNU and others.
I'll probably think of a few users as I work through them!

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Re: [CentOS] Disk read io very high, but no process perform io read

[J Martin Rushton via CentOS]

I haven't been following this thread closely, so may be off target.

When pages are moved out of the working set they are either "clean" or 
"dirty".  Clean pages have not been modified since they were originally 
moved into memory whereas dirty pages have been changed.  A dirty page 
can become clean if it is written back to disk.  Typically (though not 
always) this is a write to swap.  Read only pages, such as code or data 
will always be clean, so can be dropped when required.


When a hard fault occurs then pages have to be read from disk, 
somewhere.  That somewhere could be swap, but can also be program images 
or files.  It may be that what you observe is this latter process.


HTH,
Martin

On 12/03/2021 01:29, yf chu wrote:


yes. I suspect it has something to do with swapping. but swap is turned off on 
this server.
here is the result of free -m.
  totalusedfree  shared  buff/cache   available
Mem: 128174   97449   2440041586325   25232
Swap: 0   0   0


We have other servers. The processes running on these servers are same. but on other 
servers, the size of buff/cache is larger than the size on the server which experienced 
the problem and the size of "free" is smaller than the size on the server which 
experienced the problem.




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Re: [CentOS] Recommendations for webmail client on EL8

[J Martin Rushton via CentOS]

Hi Simon,

I'm sure you must have noticed, but just to be clear: your aging C7 
system has more life in it than a C8 system.  C8 dies this December, C7 
is projected to 30/6/24.

Martin

On 01/03/2021 13:57, Simon Matter wrote:

Hi all,

I'm still trying to find solutions to replace some aging EL6 and EL7 systems.

This time I'm looking at email. Postfix and Cyrus-IMAPd are not a problem
and also additional things like DKIM are fine. However, I'm wondering what
to use to replace good old squirrelmail with.

We had a heavily patched squirrelmail with lots of nice things like
avelsieve plugin. Since squirrelmail is dead and unable to run on newer
PHP, I'd like to use some other tool instead.

I was looking at Roundcube but it seems difficult on EL8 because a lot of
PHP stuff is missing and not available as RPMs. I guess the same is true
for the python things needed for Mailpile. In the end my list only
contains Cypht, Rainloop and Afterlogic Webmail lite.

Is there anybody running webmail on EL8? Can you make a recommendation on
a certain tool?

Thanks,
Simon

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Re: [CentOS] How to install XFCE on CentOS 8?

[J Martin Rushton via CentOS]

On 25/02/2021 20:56, Simon Matter wrote:



On 25/02/2021 18:18, Leon Fauster via CentOS wrote:

Am 25.02.21 um 15:12 schrieb J Martin Rushton via CentOS:



On 25/02/2021 13:37, Stephen John Smoogen wrote:






I was recently looking at Raymond's book "The Art of UNIX Programming"
from 2003.  He, along with contributors Thompson (inventor of UNIX),
Kernigham (C and AWK), Korn and others of that callibre, espouse
creating "little tools" that do one job reliably and well.  The likes
of Gnome or systemd certainly would never fit into this philosophy.  I
really think we have lost a lot of maintainability and ease of
management over the last 20 years as applications are stretched to do
ever more.



Well, do "ldd /bin/awk" and you see interconnected dependencies.

I see it the same way and if I want, I would see it the same way with
a broader view. Do one job well - interaction with the user, Gnome.
Do one job well - when a service is stopped, it is stopped (systemd).

So it depends of the scope of view. Sure, there are tools that try
to do everything. One that came into my mind is YasT from SuSE.
That one I would classify as not fitting into the common unix
philosophy.


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I don't want to get bogged down in arguments about which application has
the most dependencies.  It's really a matter of scale.  Depending upon a
few system libraries is reasonable, but when when the ramifications
extend to dozens then perhaps a pause for thought might be suggested?
Oh and BTW:

bash-4.2$ ldd /bin/awk
linux-vdso.so.1 =>  (0x7ffcc876a000)
libdl.so.2 => /lib64/libdl.so.2 (0x7fcd25995000)
libm.so.6 => /lib64/libm.so.6 (0x7fcd25693000)
libc.so.6 => /lib64/libc.so.6 (0x7fcd252c5000)
/lib64/ld-linux-x86-64.so.2 (0x7fcd25b99000)



That's on which OS? Certainly not EL8, right?


C7
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Re: [CentOS] How to install XFCE on CentOS 8?

[J Martin Rushton via CentOS]

On 25/02/2021 18:18, Leon Fauster via CentOS wrote:

Am 25.02.21 um 15:12 schrieb J Martin Rushton via CentOS:



On 25/02/2021 13:37, Stephen John Smoogen wrote:





I was recently looking at Raymond's book "The Art of UNIX Programming" 
from 2003.  He, along with contributors Thompson (inventor of UNIX), 
Kernigham (C and AWK), Korn and others of that callibre, espouse 
creating "little tools" that do one job reliably and well.  The likes 
of Gnome or systemd certainly would never fit into this philosophy.  I 
really think we have lost a lot of maintainability and ease of 
management over the last 20 years as applications are stretched to do 
ever more.



Well, do "ldd /bin/awk" and you see interconnected dependencies.

I see it the same way and if I want, I would see it the same way with
a broader view. Do one job well - interaction with the user, Gnome.
Do one job well - when a service is stopped, it is stopped (systemd).

So it depends of the scope of view. Sure, there are tools that try
to do everything. One that came into my mind is YasT from SuSE.
That one I would classify as not fitting into the common unix
philosophy.


--
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I don't want to get bogged down in arguments about which application has 
the most dependencies.  It's really a matter of scale.  Depending upon a 
few system libraries is reasonable, but when when the ramifications 
extend to dozens then perhaps a pause for thought might be suggested? 
Oh and BTW:


bash-4.2$ ldd /bin/awk
linux-vdso.so.1 =>  (0x7ffcc876a000)
libdl.so.2 => /lib64/libdl.so.2 (0x7fcd25995000)
libm.so.6 => /lib64/libm.so.6 (0x7fcd25693000)
libc.so.6 => /lib64/libc.so.6 (0x7fcd252c5000)
/lib64/ld-linux-x86-64.so.2 (0x7fcd25b99000)
bash-4.2$

-- which seems reasonable to me.

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Re: [CentOS] How to install XFCE on CentOS 8?

[J Martin Rushton via CentOS]

On 25/02/2021 16:54, Stephen John Smoogen wrote:



On Thu, 25 Feb 2021 at 10:07, J Martin Rushton 
mailto:martinrushto...@btinternet.com>> 
wrote:




On 25/02/2021 14:49, Stephen John Smoogen wrote:
 >
 >
 > On Thu, 25 Feb 2021 at 09:13, J Martin Rushton via CentOS
 > mailto:centos@centos.org>
<mailto:centos@centos.org <mailto:centos@centos.org>>> wrote:
 >
 >
 >
 >     On 25/02/2021 13:37, Stephen John Smoogen wrote:
 >
 >     I was recently looking at Raymond's book "The Art of UNIX
Programming"
 >     from 2003.  He, along with contributors Thompson (inventor of
UNIX),
 >     Kernigham (C and AWK), Korn and others of that callibre, espouse
 >     creating "little tools" that do one job reliably and well.  The
 >     likes of
 >     Gnome or systemd certainly would never fit into this
philosophy.  I
 >     really think we have lost a lot of maintainability and ease of
 >     management over the last 20 years as applications are
stretched to do
 >     ever more.
 >
 >
 > Maybe but everytime someone says "I think these are too complex"
they
 > then turn around and say "but I really need this to do this one more
 > thing." Also the complexity of tools is generational. The oldschool
 > 1970's Unix people were screaming that the 1980's software was too
 > complex because various flags had been added to central commands.
The
 > 1980's people complained that even early Linux was too complex
because
 > it had so much more software that depended on each other. And so
forth.
 >
 > In the X11 world, there were as many people saying FVWM was way too
 > complex when twm was all you needed and it was making software
too hard
 > to build. BUT could you get twm to work on our new monitor which
has a
 > different view screen feature that made the fonts look like crap.
 >
 > The counter argument I heard from a 1970's Unix era person was
"Software
 > gets more complicated over time as we find that more problems
need to be
 > solved. You either keep up with it, or get out of software." He was
 > working in software until his death a short while ago in his 80's.
 >
 >     --
 >     J Martin Rushton MBCS
 >     ___
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 > CentOS@centos.org <mailto:CentOS@centos.org>
<mailto:CentOS@centos.org <mailto:CentOS@centos.org>>
 > https://lists.centos.org/mailman/listinfo/centos
<https://lists.centos.org/mailman/listinfo/centos>
 >     <https://lists.centos.org/mailman/listinfo/centos
<https://lists.centos.org/mailman/listinfo/centos>>
 >
 >
 >
 > --
 > Stephen J Smoogen.
 >
The irony being that moving to UNIX I had it drummed into me that the
one tool-one job ethos was a great advance upon the rigidly defined and
integrated monolith of VMS.  Oh, and that was in the 1990s.
-- 
J Martin Rushton MBCS



And everyone I worked with told me that Unix was a poor reinvention of 
TSX-11 where you could get real work done. But since VMS came out over a 
decade after Unix, I can't say Unix is an advance over VMS.


In any case this is devolving into the 4 Yorkshiremen skit so I am done 
here.


--
Stephen J Smoogen.


Oi! Lay off Yorkshiremen.  It'll only be envy that you weren't born one. :-)
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Re: [CentOS] How to install XFCE on CentOS 8?

[J Martin Rushton via CentOS]

On 25/02/2021 14:49, Stephen John Smoogen wrote:



On Thu, 25 Feb 2021 at 09:13, J Martin Rushton via CentOS 
mailto:centos@centos.org>> wrote:




On 25/02/2021 13:37, Stephen John Smoogen wrote:

I was recently looking at Raymond's book "The Art of UNIX Programming"
from 2003.  He, along with contributors Thompson (inventor of UNIX),
Kernigham (C and AWK), Korn and others of that callibre, espouse
creating "little tools" that do one job reliably and well.  The
likes of
Gnome or systemd certainly would never fit into this philosophy.  I
really think we have lost a lot of maintainability and ease of
management over the last 20 years as applications are stretched to do
ever more.


Maybe but everytime someone says "I think these are too complex" they 
then turn around and say "but I really need this to do this one more 
thing." Also the complexity of tools is generational. The oldschool 
1970's Unix people were screaming that the 1980's software was too 
complex because various flags had been added to central commands. The 
1980's people complained that even early Linux was too complex because 
it had so much more software that depended on each other. And so forth.


In the X11 world, there were as many people saying FVWM was way too 
complex when twm was all you needed and it was making software too hard 
to build. BUT could you get twm to work on our new monitor which has a 
different view screen feature that made the fonts look like crap.


The counter argument I heard from a 1970's Unix era person was "Software 
gets more complicated over time as we find that more problems need to be 
solved. You either keep up with it, or get out of software." He was 
working in software until his death a short while ago in his 80's.


-- 
J Martin Rushton MBCS

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--
Stephen J Smoogen.

The irony being that moving to UNIX I had it drummed into me that the 
one tool-one job ethos was a great advance upon the rigidly defined and 
integrated monolith of VMS.  Oh, and that was in the 1990s.

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Re: [CentOS] How to install XFCE on CentOS 8?

[J Martin Rushton via CentOS]

On 25/02/2021 13:37, Stephen John Smoogen wrote:


They run into the same interdependency.. but because they have organically
grown their distro every day, those dependencies grew 1 at a time.

For EPEL and other EL repos you have to jump multiple Fedora releases to
catch up. So in EL6 we were Fedora Linux 12. In EL7.0 we had to jump and
rebuild from scratch a lot of Fedora Linux 18 and Fedora Linux 19 and then
progressed up to about Fedora 24 as various parts got rebased and upgraded
to 7.9. For EL8, we have to jump to Fedora Linux 28 and then each dot
release rebase parts while keeping other parts back because rebasing is
focused. [This means that if something needs glibc-2.32 you can't put it in
EL8 without a lot of patching to make it work with whatever changed... but
some other related components may be able to recompile fine.]

Thus you need people who enjoy that kind of work to do this because EPEL is
nearly all volunteer work. I had to work after hours or take vacation time
to work on getting EPEL-8 out so that I could get focused effort on it.
Most people don't have that 'luxury' and so the number of volunteers is
small but the expectation that it will be there is large.




Tony Schreiner
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I was recently looking at Raymond's book "The Art of UNIX Programming" 
from 2003.  He, along with contributors Thompson (inventor of UNIX), 
Kernigham (C and AWK), Korn and others of that callibre, espouse 
creating "little tools" that do one job reliably and well.  The likes of 
Gnome or systemd certainly would never fit into this philosophy.  I 
really think we have lost a lot of maintainability and ease of 
management over the last 20 years as applications are stretched to do 
ever more.

--
J Martin Rushton MBCS
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Re: [CentOS] How to install XFCE on CentOS 8?

[J Martin Rushton via CentOS]

Sorry, I run gdm on Springdale 8 and Alma 8.  I'm not doing much work on 
any RHEL 8 clone ATM, I prefer the longer support of C7! :-(

Martin

On 11/02/2021 10:26, Simon Matter wrote:

Thanks Martin, so the "Xfce" group definition in EPEL is obviously broken.

Looks like XFCE doesn't get much love in EL8. Do you or anyone else have
suggestions for a lightweight desktop environment to use on EL8 apart from
XFCE? One which is supported well by EPEL?

Thanks,
Simon


Hi Simon,

I'm running XFCE under CentOS 8 as a VM under CentOS 7.  I've just had a
quick look and this is what I see (see attachment).  You'll need to view
it in a wide terminal.

HTH,
Martin

On 11/02/2021 09:24, Simon Matter wrote:

Hi,

Is anyone here running XFCE desktop on CentOS 8? If so, how did you
install it?

I just tried to install it from EPEL and this is what I got:

# dnf group install Xfce
Last metadata expiration check: 0:14:01 ago on Thu 11 Feb 2021 10:05:47
CET.
No match for group package "NetworkManager-gnome"
No match for group package "thunar-archive-plugin"

I'm unable to find packages for NetworkManager-gnome or
thunar-archive-plugin anywhere in CentOS 8 or EPEL 8.

Did I miss something?

Thanks,
Simon

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Re: [CentOS] How to install XFCE on CentOS 8?

[J Martin Rushton via CentOS]

Hi Simon,

I'm running XFCE under CentOS 8 as a VM under CentOS 7.  I've just had a 
quick look and this is what I see (see attachment).  You'll need to view 
it in a wide terminal.


HTH,
Martin

On 11/02/2021 09:24, Simon Matter wrote:

Hi,

Is anyone here running XFCE desktop on CentOS 8? If so, how did you
install it?

I just tried to install it from EPEL and this is what I got:

# dnf group install Xfce
Last metadata expiration check: 0:14:01 ago on Thu 11 Feb 2021 10:05:47 CET.
No match for group package "NetworkManager-gnome"
No match for group package "thunar-archive-plugin"

I'm unable to find packages for NetworkManager-gnome or
thunar-archive-plugin anywhere in CentOS 8 or EPEL 8.

Did I miss something?

Thanks,
Simon

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$ dnf --color=never list xfce\*
Last metadata expiration check: 0:01:19 ago on Thu 11 Feb 2021 09:59:20 GMT.
Installed Packages
xfce-polkit.x86_64   0.3-3.epel8.playground  
@epel-playground
xfce4-about.x86_64   4.14.1-3.epel8.playground   
@epel-playground
xfce4-appfinder.x86_64   4.14.0-1.epel8.playground   
@epel-playground
xfce4-panel.x86_64   4.14.4-1.epel8.playground   
@epel-playground
xfce4-places-plugin.x86_64   1.8.1-1.epel8.playground
@epel-playground
xfce4-pulseaudio-plugin.x86_64   0.4.3-1.epel8.playground
@epel-playground
xfce4-session.x86_64 4.14.2-1.epel8.playground   
@epel-playground
xfce4-settings.x86_644.14.3-1.epel8.playground   
@epel-playground
xfce4-systemload-plugin.x86_64   1.2.3-2.epel8.playground
@epel-playground
xfce4-taskmanager.x86_64 1.2.3-1.epel8.playground
@epel-playground
xfce4-terminal.x86_640.8.10-1.el8@epel
Available Package:
xfce4-battery-plugin.x86_64  1.1.3-1.el8 epel
xfce4-datetime-plugin.x86_64 0.8.0-1.el8 epel
xfce4-netload-plugin.x86_64  1.3.2-1.el8 epel
xfce4-notifyd.x86_64 0.6.1-1.el8 epel
xfce4-panel-devel.x86_64 4.14.4-1.el8epel
xfce4-power-manager.x86_64   1.6.6-1.el8 epel
xfce4-screensaver.x86_64 0.1.10-1.el8epel
xfce4-screenshooter.x86_64   1.9.7-1.el8 epel
xfce4-screenshooter-plugin.x86_641.9.7-1.el8 epel
xfce4-smartbookmark-plugin.x86_640.5.1-1.el8 epel
xfce4-time-out-plugin.x86_64 1.1.0-1.el8 epel
xfce4-weather-plugin.x86_64  0.10.2-1.el8epel
xfce4-whiskermenu-plugin.x86_64  2.4.4-1.el8 epel

$ dnf --color=never list NetworkManager-gnome
Last metadata expiration check: 0:05:53 ago on Thu 11 Feb 2021 09:59:20 GMT.
Error: No matching Packages to list

$ dnf --color=never list thunar-archive-plugin
Last metadata expiration check: 0:06:16 ago on Thu 11 Feb 2021 09:59:20 GMT.
Error: No matching Packages to list

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Re: [CentOS] How to query which yum package groups a particular package is member of

[J Martin Rushton via CentOS]

Here's how to find the package for a particular file:

# ls /{bin,sbin}/dns*
/bin/dnsdomainname/sbin/dnssec-coverage   /sbin/dnssec-keyfromlabel 
/sbin/dnssec-revoke/sbin/dnssec-verify
/sbin/dnsmasq /sbin/dnssec-dsfromkey  /sbin/dnssec-keygen 
/sbin/dnssec-settime
/sbin/dnssec-checkds  /sbin/dnssec-importkey  /sbin/dnssec-keymgr 
/sbin/dnssec-signzone

# yum provides /sbin/dnsmasq
Loaded plugins: fastestmirror, langpacks, priorities
Loading mirror speeds from cached hostfile
 * centos-sclo-rh: mirror.freethought-internet.co.uk
 * centos-sclo-sclo: mirror.freethought-internet.co.uk
 * elrepo: mirrors.coreix.net
 * nux-dextop: mirror.li.nux.ro
dnsmasq-2.76-16.el7_9.1.x86_64 : A lightweight DHCP/caching DNS server
Repo: @updates
Matched from:
Filename: /sbin/dnsmasq


On 27/01/2021 19:59, Kenneth Porter wrote:
I'm trying to find out how dnsmasq got on my CentOS 7 system, since I 
use BIND for DNS. I'm guessing it was part of a base group that Anaconda 
installs for all systems.


Red Hat has this answered on this page but the answer is only available 
to subscribers. I'm guessing this kind of content will be available to 
us once the new free subscription thing starts.




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Re: [CentOS] RHEL changes

[J Martin Rushton via CentOS]

On 22/01/2021 12:25, Konstantin Boyandin via CentOS wrote:



JMNSHO.


eh?

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Re: [CentOS] RHEL changes

[J Martin Rushton via CentOS]

Hi Nick,

There's always Springdale: https://puias.math.ias.edu/


On 21/01/2021 22:00, Antonio Leding wrote:

Thanks Nick,

I was just writing a post to solicit opinions on a good goto distro for 
CentOS replacement.  I am somewhat dubious on wanting to move to 
free-RHEL and based on what you’ve said here, looks like Rocky deserves 
my attention…


If it does indeed become the successor as you’ve suggested, let’s just 
hope we can keep it from being acquired by RH or any other party. Seems 
to me that once RH decided to help CentOS out and mandated RH majority 
on the board, the writing was on the wall for what occurred in Dec…


- - -

On 21 Jan 2021, at 13:34, Nikolaos Milas wrote:


On 21/1/2021 11:17 μ.μ., Valeri Galtsev wrote:

I tried Oracle Linux. After installation it took forever to update 
yum database, or do you yum search. Also: I didn't find mirrors... 
All this sort of ruled it out for me.


Don't worry, Rocky Linux is in good track; Latest update:

https://forums.rockylinux.org/t/community-update-january-2021/1667

It will be with us very soon, and the formerly CentOS community is 
very active on it!


I am very optimistic with it.

RH is trying to catch all those CentOS users/admins who will jump off 
the train to shift to Rocky Linux (or other), but I think Rocky Linux 
will become the natural successor.


The future is close, we shall see.

Nick

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[CentOS] RHEL changes

[J Martin Rushton via CentOS]

See: 
https://arstechnica.com/gadgets/2021/01/centos-is-gone-but-rhel-is-now-free-for-up-to-16-production-servers/

and
https://www.redhat.com/en/blog/new-year-new-red-hat-enterprise-linux-programs-easier-ways-access-rhel
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Re: [CentOS] Out of office: "CentOS Digest, Vol 191, Issue 26"

[J Martin Rushton via CentOS]

On 26/12/2020 18:56, Frank Cox wrote:

On Sat, 26 Dec 2020 12:25:50 -0600
Valeri Galtsev wrote:


Then let's make a little contest out of it: what's the most stupid thing you've
done as a system administrator ?


Cleaning up some obsolete users on a system that accepts remote ssh logins and 
somehow managing to remove my own ssh key too.  Which I discovered about ten 
minutes later when I went to log in again and found that I had locked myself 
out.



Not one I did, but one I was part of.  A co-worker and I were discussing 
something or other (might even have been work related) leaning on top 
one of the VAX 11/750s in the machine room.  They are just a convenient 
elbow height.  Suddenly the console spewed into life, and for some 
strange reason the system was booting.  Oops, my co-worker had managed 
to press their stomach against the reset button!


Mind, I can also recall the same co-worker sorting out a hardware 
problem that had been baffling the engineers for an hour - the on-off 
switch was in the off position!


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Re: [CentOS] Out of office: "CentOS Digest, Vol 191, Issue 26"

[J Martin Rushton via CentOS]

On 26/12/2020 12:36, Nicolas Kovacs wrote:

Le 26/12/2020 à 13:00, m...@jump.com.hk a écrit :

Thank you for your email, our office will close from 1pm 24 Dec to 27 Dec
and will resume on 28 Dec. Wish you a merry Christmas and happy new year.


Am I the only one feeling a strong urge to blood-eagle out-of-office repliers
on public mailing lists ?

:o)



Not the only one, but there might be an alternative: 
https://en.wikipedia.org/wiki/Hanged,_drawn_and_quartered


:-)

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Re: [CentOS] Running script before reboot or shutdown

[J Martin Rushton via CentOS]

This could be the same issue that people run into when designing cron 
jobs.  You may only have a limited set of directories on you $PATH and 
other environment variables may be missing.  If this is the case, ensure 
that you define the full path to utilies:


MYPROG="/home/carlos/myprog"
$MYPROG -h

rather than

myprog -h

HTH, and BTW you can still use init scripts if it is easier.

On 22/12/2020 11:51, Carlos Lopez wrote:

Hi all,

I am trying to configure a script as a systemd service to run first when a 
shutdown or reboot is called. This script execute some scp commands to copy 
some files to other machines. My actual defined systemd’s file is:

[Unit]
Description=Remote copy some files before reboot/shutdown
Before=poweroff.target halt.target shutdown.target reboot.target
DefaultDependencies=no

[Service]
Type=simple
ExecStart=/bin/true
ExecStop=/usr/local/bin/remote_copy
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target

But it doesn’t work. “remote_copy” is working when it is executed from root 
shell. I am using CentOS-8 fully patched release.

Any idea what am I doing wrong?

Regards,
C. L. Martinez
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Re: [CentOS] Moving to CentOS 8 Stream

[J Martin Rushton via CentOS]

I thought I saw a reply from Johnny that streams wasn't quite ready, maybe
he will chime in but that's what I thought I saw in a response.

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Beta perhaps? :-o

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Re: [CentOS] [CentOS-devel] https://blog.centos.org/2020/12/future-is-centos-stream/

[J Martin Rushton via CentOS]

On 09/12/2020 09:26, cen...@niob.at wrote:

On 09/12/2020 07:16, Kingsly John wrote:


A non-paying CentOS user is not a real loss for RHEL. But people dumping
CentOS for a non-RHEL clone is definitely going to impact their future
revenues as they are losing mindshare/goodwill/easy migration etc.


And worse: Without CentOS being used widely (junior) admins will have 
even less experience dealing with RHEL. This will result in lower 
quality deployments of RHEL, reducing overall security of those systems 
and it will reduce RHEL adoption, hitting RH/IBM where it hurts them most.


I am seeing this in practice already with juniors - they all use Ubuntu 
on their personal systems and they hate having to deal with RHEL. And 
their opinions matter in the long run.



peter

And exactly the same applies to senior (or retired) admins on their home 
computers.  My main home machine runs about a dozen testbed VMs, 
DHCP/DNS for the home network, Amanda, NFS and Samba for other machines, 
ownCloud, Apache, Zotero and DokuWiki for the family.  I want a stable 
server under that lot, not a beta release.


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Re: [CentOS] https://blog.centos.org/2020/12/future-is-centos-stream/

[J Martin Rushton via CentOS]

The first thing Oracle wants is for you to sign up for an Oracle 
account.  Hmm, I'll give Springdale a try.  For those with long 
memories, remember the DEC RDMS promises prior to take over, and the 
aftermath?


On 08/12/2020 15:58, Julio E. Gonzalez wrote:

I am already using Oracle Linux in some servers.

Free as CentOS, faster updates than CentOS, and with some extra support, 
BTRFS and a newer kernel, for example.



On 12/8/20 12:15 PM, Pete Biggs wrote:


Red Hat's perspective is "CentOS is ours now; IBM have told us to make
sure it's pulling its weight or we aren't allowed to put any resources
into it"

So as far as I can see all the RHEL rebuilds are dead now - WhiteBox,
Scientific Linux, now CentOS. Are there any left?

P.




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Re: [CentOS] https://blog.centos.org/2020/12/future-is-centos-stream/

[J Martin Rushton via CentOS]

To be fair, that was a commitment RH gave.  They are now a department 
within Big Blue and must dance to their tune.  Of course you 
could always try holding your breath and awaiting the sell off to Lenovo 
in about five years time.


On 08/12/2020 16:25, Lange, Markus wrote:

Hi,

this is really bad news.

Back in 2014 [1], sadly no one at RH seems to remember...

"Some of the things that are not changing:
- - The CentOS Linux platform isn't changing. The process and methods
built up around the platform however are going to become more open,
more inclusive and transparent.
- - The sponsor driven content network that has been central to the
success of the CentOS efforts over the years stays intact.
- - The bugs, issues, and incident handling process stays as it has
been
with more opportunities for community members to get involved at
various stages of the process.
- - The Red Hat Enterprise Linux to CentOS firewall will also remain.
Members and contributors to the CentOS efforts are still isolated from
the RHEL Groups inside Red Hat, with the only interface being srpm /
source path tracking, no sooner than is considered released. In
summary:  we retain an upstream.

Feel free to reach out if you have specific concerns about how this
change impacts your CentOS story. URLs mentioned at the bottom of this
email should be a good starting point."

Crossing fingers that alternatives emerge soon.

Best regards,
Markus

[1]
https://lists.centos.org/pipermail/centos-announce/2014-January/020100.html


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Re: [CentOS] ntpdate past CentOS 7

[J Martin Rushton via CentOS]

On 02/12/2020 23:32, Brian Reichert wrote:

On Wed, Dec 02, 2020 at 02:17:04PM -0500, Jerry Geis wrote:

So ntpdate is no longer present past CentOS 7.


What's wrong with the 'ntpdate' RPM?

https://centos.pkgs.org/7/centos-x86_64/ntpdate-4.2.6p5-29.el7.centos.2.x86_64.rpm.html


What's wrong is that you've quoted the CentOS7 RPM, not the CentOS8 one 
(which doesn't exist).  The OP was asking about ntpdate "past CentOS 7".



Thanks,

Jerry
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Re: [CentOS] Best practice preparing for disk restoring system

[J Martin Rushton via CentOS]

Thanks for that.  I only picked up on rear this morning, I suppose if 
you don't go looking for it you'll never find it.  A combination of the 
paper Site Management Guide and the nightly disk summary have worked for 
over 20 years on *NIX!  VMS before that was totally different, but we 
still kept paper copies of configuration.


On 18/11/2020 12:47, Felix Kölzow wrote:

What I've done in the past is before the nightly backup write a small
file to the root of each filesystem giving disk geometries.  You can
then use any recovery DVD to partition and reload the OS.  If rear can
do this for me it would be __much__ neater!

According to rear webpage: https://relax-and-recover.org/about/

Extensive disk layout implementation, incl.

  * HWRAID (HP SmartArray)
  * SWRAID
  * LVM
  * multipathing
  * DRBD
  * iSCSI
  * LUKS (encrypted partitions and filesystems)

I personally used rear to restore lvm volume groups and several logical
volumes with success.

I will test a more complicated layout until the end of this year and can
let you know about the findings.

Regards,

Felix

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Re: [CentOS] Best practice preparing for disk restoring system

[J Martin Rushton via CentOS]

I'd agree with you John.  I'm trying to get away from Amanda's 
unpredictability and go back to using scripts to drive dump (for 
ext2/3/4) and xfsdump (for xfs).


Is there any easy way to tell rear to include xfsdump and dump 
capability?  If the commands are there then its trivial to restore data.


What I've done in the past is before the nightly backup write a small 
file to the root of each filesystem giving disk geometries.  You can 
then use any recovery DVD to partition and reload the OS.  If rear can 
do this for me it would be __much__ neater!


On 18/11/2020 08:24, John Pierce wrote:

I'm old school, but I always liked using dump/restore on unix file
systems.  e2dump or whatever for linux, zfs send/recieve for zfs, ufsdump
on freebsd ufs, etc etc.

then I just need to know what file systems they are, and where they should
be mounted, and its trivial to set tha tup on new hardware.
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Re: [CentOS] Centos 8 and logwatch

[J Martin Rushton via CentOS]

Hmm, it works fine for me, both as a cron job and when run directly.  My 
system was last patched about 2 hours ago.


Are you getting any mail?

$ mail mail
Subject: test
test
^D
$

If you get no message then logwatch isn't your issue.  Next check your 
cron file, it ought to be in /etc/cron.daily/0logwatch


Ensure that LOGWATCH_SCRIPT actually points to the code (typically 
/usr/sbin/logwatch)


Check that the line for the following line:
OPTIONS="--output mail"

The actual invocation on my system is:
$LOGWATCH_SCRIPT --range="between $day and yesterday" $OPTIONS

As a final resort, edit 0logwatch and add the line "set -vx" just above 
the invocation.  This will generate output which cron will attempt to 
send to root.


Regards,
Martin

On 13/11/2020 12:03, Blaž Bogataj wrote:

Hello
I am trying to get logwatch working on CentOS 8. System is fully updated.
Usually install minimal version and then add only necessary with yum.

On CentOS 7: install logwatch and get daily logwatch report on mail.

On CentOS 8: install logwatch but no way to get mail.

Am I doing something wrong? Or miss something?

Thanks in advance
Blaz
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Re: [CentOS] MIDI on a VM

[J Martin Rushton via CentOS]

On 13/11/2020 09:09, J Martin Rushton via CentOS wrote:

On 13/11/2020 07:01, Simon Matter wrote:

On 12/11/2020 17:26, Ralf Prengel wrote:

Hallo,
witch virtualizer are you using.


KVM/QEMU

Sure that the virtual sound-device is connected with the right 
hardware?


I can play CDs and listen to YouTube on the host, so I'm assuming the
hardware is fine.


I don't know how this works here but doesn't playing MIDI files mean you
need a MIDI capable sound card which generates the sound? Maybe the
virtual sound-device is only capable to play audio?

Regards,
Simon



Very good point.  I will investigate further.  I had two models in my head:

1) The Frescobaldi playback module did the MIDI-> sound conversion.
2) The virtual card passed the signals on to the physical card.

Perhaps your third model is correct.


Extra information: I've run up YouTube with the virtual sound card set 
to ac97 and can play back a simple audio stream.  Running the MIDI 
system has no effect.  Furthermore the mixer shows a connection from 
Firefox, but doesn't show one from Frescobaldi.


I think you've hit the nail on the head.  Well done.  Now how to fix it!

Regards,
Martin

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Re: [CentOS] MIDI on a VM

[J Martin Rushton via CentOS]

On 13/11/2020 07:01, Simon Matter wrote:

On 12/11/2020 17:26, Ralf Prengel wrote:

Hallo,
witch virtualizer are you using.


KVM/QEMU


Sure that the virtual sound-device is connected with the right hardware?


I can play CDs and listen to YouTube on the host, so I'm assuming the
hardware is fine.


I don't know how this works here but doesn't playing MIDI files mean you
need a MIDI capable sound card which generates the sound? Maybe the
virtual sound-device is only capable to play audio?

Regards,
Simon



Very good point.  I will investigate further.  I had two models in my head:

1) The Frescobaldi playback module did the MIDI-> sound conversion.
2) The virtual card passed the signals on to the physical card.

Perhaps your third model is correct.
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Re: [CentOS] MIDI on a VM

[J Martin Rushton via CentOS]

On 12/11/2020 17:26, Ralf Prengel wrote:

Hallo,
witch virtualizer are you using.


KVM/QEMU


Sure that the virtual sound-device is connected with the right hardware?


I can play CDs and listen to YouTube on the host, so I'm assuming the 
hardware is fine.



Ralf

Von meinem iPad gesendet


Am 12.11.2020 um 18:00 schrieb J Martin Rushton via CentOS :

I have an application (Frescobaldi/Lilypond) that generates and plays MIDI files. Due to 
problems with flatpak I can only run it on C8 or Fedora, both of which live on VMs. The 
host is running C7. I've tried "adding hardware", specifically a virtual sound 
card, to the VMs, but still they remain silent. How do I connect the virtual sound cards 
to the physical sound card so that I can hear the music?

Thanks,
Martin


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[CentOS] MIDI on a VM

[J Martin Rushton via CentOS]

I have an application (Frescobaldi/Lilypond) that generates and plays 
MIDI files. Due to problems with flatpak I can only run it on C8 or 
Fedora, both of which live on VMs. The host is running C7. I've tried 
"adding hardware", specifically a virtual sound card, to the VMs, but 
still they remain silent. How do I connect the virtual sound cards to 
the physical sound card so that I can hear the music?


Thanks,
Martin


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Re: [CentOS] Laptop and NFS homedir

[J Martin Rushton via CentOS]

I've been playing with OwnCloud on a home network recently and it seems 
to be handling sync traffic well.  A couple of points to make:
1) Be aware that the server and client repositories are different.  You 
can do a lot with the web interface to the server, but you'll really 
want the client for ease of use.
2) Synchronising isn't instant.  It can take a few minutes for 100+ MiB 
syncs, particularly since I was going W10 (clinet)->VM (server) ->host 
(client).


Other than the above, it's basically set-and-forget.  I can download 
photos onto the laptop, run GIMP on the C7 machine, and store the 
results on the C8 VM server quite happily.


On 26/08/2020 14:22, Richard G wrote:


I would instead look at cloud sync clients. The open source Linux OneDrive 
client is pretty good these days for example.

Of course the “cloud” end can also be on-premise using OwnCloud or NextCloud or 
whatever the latest cool thing is.
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Re: [CentOS] Running commands as apache user

[J Martin Rushton via CentOS]

On 08/08/2020 01:01, H wrote:

On 08/07/2020 07:56 PM, H wrote:

I have a dilemma: I have nextcloud running under user and group apache, as recommended by 
the installation. I now have to run some nextcloud commands but even as root I cannot su 
to user apache because "this account is currently not available". Is there a 
way around this? The commands must be run as user apache...

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Fixed. I found "su -l apache -s /bin/bash" on the web which allows me to get 
around the nologin.

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A little suggestion to you - edit /etc/nologin.txt to read:

This account is currently not available.  Try: # su -l  -s /bin/bash

Make sure the file is set to 644 and it will prompt you if you forget 
the syntax.


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Re: [CentOS] rsync upgrade

[J Martin Rushton via CentOS]

You'll need to upgrade to CentOS8.

C7 is at rsync 3.1.2-10, and will not go above 3.1.2 ever.

C8.2 is at 3.1.3-7, C8 will always be on 3.1.3

Martin

On 06/08/2020 16:40, Christopher Wensink wrote:

Can anyone tell me the repository to use to upgrade to a version of
rsync later than 3.1.2?

Chris



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Re: [CentOS] hardlinks

[J Martin Rushton via CentOS]

On 17/07/2020 10:30, Alessandro Baggi wrote:


Il 17/07/20 10:54, Karl Vogel ha scritto:

It depends on the size of the variables in the structure used by the
stat() call.  In ext4, the "links" variable is an unsigned 16-bit 
integer,

so you have your limit of 64k or so.  I've worked with systems where
the limit was a signed 16-bit integer, so it maxed out at 32k.

XFS may be a full 32-bit integer, so your test script could be running
for quite some time.  Or it may just allocate space as it needs.  It 
sounds

like you have plenty of room for links, so I wouldn't worry.

--
Karl Vogel / voge...@pobox.com / I don't speak for the USAF or my company

Don't accept your dog's admiration as
conclusive evidence that you are wonderful. --Ann Landers


Hi Karl,

thank you for your clarification. I will try to rearch this limit (by 
curiosity)


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Have a look at 
https://mirrors.edge.kernel.org/pub/linux/utils/fs/xfs/docs/xfs_filesystem_structure.pdf


On page 105 the inode structure is given:

__uint16_t  di_onlink;
...
__uint32_t  di_nlink

Page 107 gives more detail:

di_onlink:
In v1 inodes, this specifies the number of links to the inode from 
directories. When the number exceeds 65535,the inode is converted to v2 
and the link count is stored in di_nlink.


di_nlink:
Specifies the number of links to the inode from directories. This is 
maintained for both inode versions for current versions of XFS. Prior to 
v2 inodes, this field was part of di_pad.


So, the effect is that whatever version you start with, adding more than 
65535 links will force it to version 2 and give you up to 4,294,967,295 
links!


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Re: [CentOS] fdisk boot partition

[J Martin Rushton via CentOS]

On 01/07/2020 08:42, Warren Young wrote:

On Jun 30, 2020, at 1:25 PM, John Pierce  wrote:


On Tue, Jun 30, 2020 at 12:12 PM Jerry Geis  wrote:


I am trying to use CentOS 8 host to boot an image (OS X) that  I created
using dd.

First I tried fdisk -l image_file.img ...



fdisk has been deprecated for quite a long time, I think parted is the
preferred command line tool now.


Even to the extent that it works, it’d only support MBR partitioning, and you 
almost certainly want GPT for a macOS boot image.

…and then “bootable” flags go out the window anyway, because EFI doesn’t care 
about that.

fdisk has been updated:
  # fdisk /dev/sdb
  ...
  Welcome to fdisk (util-linux 2.23.2).
  ...
  Command (m for help): m
  Command action
  ...
g   create a new empty GPT partition table
  ...

How good it is, I leave to others.

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Re: [CentOS] HP vs. Brother Printers: Use with Centos/Fedora

[J Martin Rushton via CentOS]

I've been running an HP MFP281 for a year or two now and it functions 
well.  There are some downsides though to be aware of:


* HPLIP doesn't support all HP printers, and not as quickly as you might 
wish, so be prepared to find the nearest model for CUPS.


* HP have sharp practice over toner cartridges.  To be clear, software 
updates will invalidate full third party cartridges which end up on the 
skip.  The phrase "sod the customer" comes to mind.


On the plus side, quality is good.  Colour is fine and the resolution of 
the scanner is good.  The paper feed mechanisms both for printing and 
for scanning are fine.


HTH,
Martin

On 27/06/2020 22:49, Jay Hart wrote:

Centos 8, I should specify...

Jay


If you had to rate which printer brand works better with Linux (Fedora and 
Centos), what would it be?

TIA,

Jay



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Re: [CentOS] halt versus shutdown

[J Martin Rushton via CentOS]

On 15/06/2020 15:53, Valeri Galtsev wrote:



On 6/15/20 6:19 AM, Leon Fauster via CentOS wrote:

Am 15.06.20 um 05:38 schrieb Strahil Nikolov via CentOS:

Working with different Linux Distributions makes the life harder.
So far I have found out that 'poweroff' & 'reboot' has the same 
behaviour on  Linux/Unix/BSDs.




Yeah, poweroff seems the appropriate command instead of halt.

Thanks for all the "historical" input. Things make now sense :-)



Thanks for excurse in the past, whent the world made sense ;-)

Valeri


--
Leon


Hmm.  If the disks really were "on fire", my preferred means of shutdown 
was the big red button by the door as I exited, PDQ.


Actually I did once have to do this.  I was "minding the shop" at lunch 
time on a sunny day.  As I looked into the machine room from the 
operations office I saw a cloud of smoke arising from the floor through 
one of the AC vents.  Dead stop - building alarm and get out.  It turned 
out that one of the AC units had started its steam generator and the 
blast was picking up dist mites, which showed up in a shaft of sunshine 
looking light smoke.  Most machines were at the 
far end of the room and it was only occasionally that that particular 
unit came on.  The fire brigade confirmed that it was the right action, 
but some of the users were less happy!


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Re: [CentOS] Default ACL inheritance question

[J Martin Rushton via CentOS]

Look at the acl(5) man page and you'll see that the ACCESS CHECK 
ALGORITH starts:


IF the effective user ID of the process matches the user ID of the file 
object owner ...


ELSE IF the effective user ID of the process matches the qualifier of 
any entry of type ACL_USER,

THEN
IF the matching ACL_USER entry and the ACL_MASK entry contain 
the requested permissions, access is granted,

ELSE access is denied.
ELSE ...

The effective user ID is .  This matches an ACL_USER entry 
(user:user-b:r--) so therefore consider the ACL_MASK.  It is "---" so 
does NOT contain the requested permission, and therefore access is denied.


Right, now we know why access is refused.  Cast your eyes slightly 
further up the man page to OBJECT CREATION AND DEFAULT ACLS.  Point 1 
states that the object inherits the default ACL of the containing 
directory as its access ACL.  So far so good, but point 2 states that 
the "file permission bits are modified so that they contain no 
permissions that are not contained in the permissions specified by the 
mode parameter".  What I suspect is happening is that the mode parameter 
is set during file creation and so the mask is cleared to ensure that 
the creator's wish overrides the directory default.


You need to either investigate the application (difficult, long winded), 
contact support (good luck), or find a way to live with it.  Sudo is one 
solution, another is a script that does a setfacl -m m::rx logfile.


HTH,

Martin

On 14/05/2020 14:26, James Pearson wrote:
A bit of a minor off-topic issue, but on the off-chance that someone 
understands how ACLs work ...


I've been trying to see if using default ACLs would help with the 
following issue:


I have a third party application that is running as a non-root user 
('user-a') and creating log files with mode 0600 (read/write only to the 
owner) in a log directory


I have another application that runs as another non-root user ('user-b') 
that needs to read the log files created by 'user-a'


I can't change the mode of the log files generated by 'user-a', but I 
thought I could add a default ACL to the log file's parent directory 
that gave read access to 'user-b' - i.e. something like:


% sudo setfacl -d -m u:user-b:r logdir
% getfacl logdir
# file: logdir
# owner: user-a
# group: user-a
user::rwx
group::r-x
other::r-x
default:user::rwx
default:user:user-b:r--
default:group::rwx
default:mask::rwx
default:other::r-x

Now when new log files are created in logdir, the default ACL is 
inherited, but 'user-b' still can't read the files - i.e.


% getfacl logdir/logfile
# file: logdir/logfile
# owner: user-a
# group: user-a
user::rw-
user:user-b:r-- #effective:---
group::rwx  #effective:---
mask::---
other::---

i.e. the effective access for 'user-b' is '---' - which is no access to 
read for 'user-b'


I'm not sure where 'effective' comes from?

If I now explicitly add a read ACL for user-b to logdir/logfile:

% sudo setfacl -m u:user-b:r logdir/logfile
% getfacl logdir/logfile
# file: logdir/logfile
# owner: user-a
# group: user-a
user::rw-
user:user-b:r--
group::rwx
mask::rwx
other::---

and 'user-b' can read logdir/logfile

I guess I'm missing something on how default ACLs are meant to work - 
can anyone explain what is happening here or point me in the right 
direction ?


I've actually 'solved' the issue with a suitable sudoers rule that 
allows 'user-b' to run the required command as 'user-a', but I would 
like to find out why this default ACL method doesn't work


Thanks

James Pearson
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Re: [CentOS] Zoom?

[J Martin Rushton via CentOS]

If you have any choice in the matter I would suggest a read of 
https://en.wikipedia.org/wiki/Zoom_Video_Communications#Criticism before 
using or installing Zoom.


On 06/04/2020 00:01, Barry Brimer wrote:

According to 
https://support.zoom.us/hc/en-us/articles/214629443-Zoom-web-client#h_2da60ac7-455e-466f-85d1-974aa68f0703
 you would be able to join without an extension with sound in chrome but not in 
firefox.

On April 5, 2020 10:34:36 PM UTC, mark  wrote:

Hi, folks,

After I did a complete reinstall of current 7, with KDE instead of
minimal, I'm mostly ok... except for Zoom. Has anyone gotten sound
working with firefox? I get video, but it keeps claiming that my
browser
(the default firefox) can't access the system sound.

Given that even as I type this, I'm streaming WUMB through its
player I have noScript, but I enabled everything (except
google-analytics), and no joy. I'd *really* rather use my browser than
trust their app

mark
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Re: [CentOS] From network-scripts to NetworkManager on a router : questions

[J Martin Rushton via CentOS]

On 18/02/2020 16:56, Nicolas Kovacs wrote:

Le 18/02/2020 à 17:43, Jonathan Billings a écrit :

According to 'man nm-settings-ifcfg-rh', PEERDNS=no is the old
network-services services mechanism for not changing /etc/resolv.conf,
while in NM it just means never add automatic nameservers to
resolv.conf from DHCP, PPP, VPN, etc.  Turning off all DNS
updates means adding:

[main]
dns=none

... to the NetworkManager.conf (or preferably in an
/etc/NetworkManager/conf.d/  file) is probably going to be the most
effective way.  I've seen PEERDNS=no make NetworkManager not overwrite
my resolv.conf but maybe I should be extra careful and drop in a
config file that turns off all dns updating features of
NetworkManager.


See my previous mail on that subject.

tl;dr : as long as you don't provide any DNS information for any of the 
interfaces, /etc/resolv.conf does *not* get overwritten.


I had a fight with getting resolv.conf sorted out across several VMs. 
There are a few notes in the enclosed file.

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Re: [CentOS] CentOS 8 on USB disk

[J Martin Rushton via CentOS]

I'd be a bit careful with that one Joakim.  If dd throws an error for 
any reason the sync will not run and your USB may be in a partially 
written state for some time.  Since it is not mounted, there is no 
umount command to sync for you.  If you pull the stick out shortly after 
the dd command was run you will have a partially written USB - nasty. 
I'd suggest "dd if=iso of=usbdevice status=progress ; sync", though 
personally I'm a bit old school and manually do a "sync ; sync" before 
removing raw devices.


On 30/01/2020 06:37, Joakim Dellrud wrote:

I usually use the command "dd if=iso of=usbdevice status=progress && sync"

On Wed, 29 Jan 2020, 18:36 Erick Perez - Quadrian Enterprises, <
epe...@quadrianweb.com> wrote:


That happened to me several times
  My USB was "burned" and never displayed new data copied to it.
By "burned" I mean the flash drive was faulty up to a point where it always
showed a phantom image of what WAS in the pen drive.

But YMMV

On Wed, Jan 29, 2020, 11:56 AM J Martin Rushton via CentOS <
centos@centos.org> wrote:


What's your dd command?  Are you sure you are writing to the raw disk
and not inside a partition?

On 29/01/2020 16:30, Jerry Geis wrote:

Well after a closer look - Seems like the OLD 8.0 iso image is still on

the

USB. Not the new 8.1

I have tried to redo the dd command to copy the 8.1 iso - I get no

errors -

but it still comes up with the 8.0
I then tried to remove the partitions, save and recopy. still same old

boot

menu.

Is there a trick to write over the UEFI stuff ?

Jerry
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Re: [CentOS] CentOS 8 on USB disk

[J Martin Rushton via CentOS]

What's your dd command?  Are you sure you are writing to the raw disk 
and not inside a partition?


On 29/01/2020 16:30, Jerry Geis wrote:

Well after a closer look - Seems like the OLD 8.0 iso image is still on the
USB. Not the new 8.1

I have tried to redo the dd command to copy the 8.1 iso - I get no errors -
but it still comes up with the 8.0
I then tried to remove the partitions, save and recopy. still same old boot
menu.

Is there a trick to write over the UEFI stuff ?

Jerry
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Re: [CentOS] Need info on adobe flash player plugin 32 for CentOS7

[J Martin Rushton via CentOS]

On 16/01/2020 20:37, Steve Clark wrote:

On 01/16/2020 03:30 PM, Chris Adams wrote:

Once upon a time, Kay Schenk  said:

I kept getting messages that my old Flash Player 31 was obsolete so
I went in search of an update.

Adobe stopped releasing Flash for Linux a while back.  IIRC the only
"supported" Flash on Linux is distributed as a part of Google Chrome
(and that's going away sometime soon too, Chrome on all platforms will
no longer support Flash).


Don't know about C7 but I just yum updated my C6 system.
adobe-linux-x86_64 | 2.9 kB 00:00

Resolving Dependencies
--> Running transaction check
---> Package flash-plugin.x86_64 0:32.0.0.255-release will be updated
---> Package flash-plugin.x86_64 0:32.0.0.314-release will be an update
--> Finished Dependency Resolution


It's still supported on C7:

$ yum list | grep flash
flash-plugin.x86_6432.0.0.314-release @adobe-linux-x86_64
...

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Re: [CentOS] Centos 8 Mate?

[J Martin Rushton via CentOS]

On 17/10/2019 15:59, Fred Smith wrote:
> On Thu, Oct 17, 2019 at 09:08:28AM -0500, Johnny Hughes wrote:
>> On 9/24/19 2:41 PM, Frank Cox wrote:
>>> Without wanting to sound too pushy, I'm wondering if there is any update on 
>>> the status of Mate now that Centos 8 has been released?
>>>
>>> I would love to jump on C8 and start playing with it, but the lack of Mate 
>>> is kind of  a showstopper for me at the moment.
>>>
>>
>> Is gnome3 really that bad :D
>>
>> I decided to just bite the bullet and shift to real gnome3 (and not the
>> classic) about 4 years ago.  It waas different and took some time to
>> learn .. BUT .. I can do everything I need to do now.
>>
>> I like both mate and cinnamon .. so I am not knocking either one. I just
>> think people might be well server switching to a 'supported' desktop in
>> the longer run.
>>
>> Again .. don't get me wrong .. it's open source, so do what makes you
>> happy :D
>>
> 
> Johnny, I'm sure it can be learned, apparently lots of people have done
> so and are now happy(for some values of happy) with it.
> 
> That is just something I don't feel like doing. I'm not against change,
> but the changes in Gnome 3 seemed to me to be needlessly adding pain
> and difficulty to what had been a perfectly usable desktop. Every time
> I install a new CentOS I grit my teeth at having to remember/figure out
> enough of it to get me thru to the point where I can use a friendly UI.
> 
> Yes, I should stop being a luddite and learn it. but, y'know, I just
> can't bring myself to deal with the pain. As a geezer, I guess I'm
> kinda set in my ways. :)
> 
> Just to get the Mate installed on C8 (as was posted here recently
> where/how to do it) was more pain that I enjoyed going through. Now,
> I'm sure there are simple solutions to these issues, but I just don't
> want to have to stop what I'm doing to google for them... anyway,
> I had firefox open and wanted a terminal window. couldn't figure out
> how to set it up so I could see both at the same time. Once I maximized
> FF I couldn't figure out how to get it to not eat the entire screen--no
> clicky buttons on the top-right of the window, so I ended up using the
> left-most item at the top of the window (forget what it is named...) to
> choose which window I wanted in front. tedious but livable.
> 
> but now I don't have to do that 'cause Mate works great!
> 
> And thanks to you, Johnny, and your companions/associates for all the
> many YEARS of work you've all put in on CentOS. Even though I gripe and
> complain about Gnome3, I really do appreciate all you've done!
> 
> Fred
> 

If you install gnome-tweaks then you can run up the "tweaks" app.  Goto
the "Windows" tab and you can turn on title bar buttons, they're down at
the bottom.  It may not make Gnome friendly, but it does at least reduce
the amount of outright hostility shown.

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Re: [CentOS] C8 install libreoffice

[J Martin Rushton via CentOS]

On 30/09/2019 04:36, Jon LaBadie wrote:
> On Mon, Sep 30, 2019 at 12:02:18AM +0200, Ulf Volmer wrote:
>> On 29.09.19 23:05, J Martin Rushton via CentOS wrote:
>>
>>> Can't see qny sort of office there, however when I do
>>>  # yum group info "office*"
>>> all the expected LibreOffice stuff is there.
>>
>> yum group list --hidden
>>
> At least on CentOS 7, hidden is not an option but a keyword:
> 
>   yum group list hidden
> 
> jl
> 

You never stop learning.  For the last 10 years (my old cluster came
with 5.3) I've tended to think that groups were a "nice idea" that
no-one ever bothered to implement properly.  I never realised that all
the interesting groups were hidden!  Thank goodness for "yum search" and
for C5 "yum list | grep".

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Re: [CentOS] C8 install libreoffice

[J Martin Rushton via CentOS]

On 28/09/2019 13:46, Markus Falb wrote:
> On 28.09.19 00:39, Ulf Volmer wrote:
>> On 28.09.19 00:07, Jerry Geis wrote:
>>> How do you install libreoffice. yum install libreoffice did not do it,
>>> doing a search on "centos 8 install libreoffice" did not provide anything.
>>
>> There is no single package libreoffice in CentOS 8. Instead there are
>> several packages for each libreoffice component like libreoffice-calc,
>> libreoffice-draw and so on.
>>
>> You may like to install all of them by executing
>>
>> yum group install "Office Suite and Productivity"
> 
> Alternatively you may like to learn how to use your package manager to
> get answers to your questions.
> 
> ...snip
> # yum search libreoffice
> ...
> snap...
> 
There's some funniness with the groups though:

 # yum group list
 Last metadata expiration check: 0:00:45 ago on Sun 29 Sep 2019 21:52:39
BST.
 Available Environment Groups:
   Server with GUI
   Server
   Minimal Install
   KDE Plasma Workspaces
   Virtualization Host
   Custom Operating System
 Installed Environment Groups:
   Workstation
 Available Groups:
   Container Management
   .NET Core Development
   RPM Development Tools
   Smart Card Support
   Development Tools
   Graphical Administration Tools
   Headless Management
   Legacy UNIX Compatibility
   Network Servers
   Scientific Support
   Security Tools
   System Tools
   Fedora Packager

Can't see qny sort of office there, however when I do
 # yum group info "office*"
all the expected LibreOffice stuff is there.

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Re: [CentOS] CentOS 8.0 1905 is now available for download

[J Martin Rushton via CentOS]

Host: CentOS 7.7, virtualisation through KVM and qemu.  Pretty standard,
straight out of the box.  I just used VMM to run up another VM and
installed into it.

On 24/09/2019 12:38, Turritopsis Dohrnii Teo En Ming wrote:
> Hi,
> 
> What hypervisor/virtual machine monitor and host operating system are you 
> using?
> 
> 
> On Tue, 24 Sep 2019 at 19:31, J Martin Rushton via CentOS
>  wrote:
>>
>> On 24/09/2019 12:16, Turritopsis Dohrnii Teo En Ming wrote:
>>> Good evening from Singapore,
>>>
>>> Anybody downloaded, installed, and tried CentOS 8.0 1905 yet?
>>>
>>> Download link from CentOS download mirror near to Singapore:
>>>
>>> http://mirror.vodien.com/centos/8.0.1905/isos/x86_64/CentOS-8-x86_64-1905-dvd1.iso
>>>
>>> The DVD ISO filesize is 6.6 GB.
>>>
>>> I am downloading it right now...Approx. 20 mins more to download
>>> completion using 1 Gbps home fiber internet connection.
>>>
>>>
>>> -BEGIN EMAIL SIGNATURE-
>>>
>>> The Gospel for all Targeted Individuals (TIs):
>>>
>>> [The New York Times] Microwave Weapons Are Prime Suspect in Ills of
>>> U.S. Embassy Workers
>>>
>>> Link: 
>>> https://www.nytimes.com/2018/09/01/science/sonic-attack-cuba-microwave.html
>>>
>>> 
>>>
>>> Singaporean Mr. Turritopsis Dohrnii Teo En Ming's Academic
>>> Qualifications as at 14 Feb 2019 and refugee seeking attempts at the
>>> United Nations Refugee Agency Bangkok (21 Mar 2017) and in Taiwan (5
>>> Aug 2019):
>>>
>>> [1] https://tdtemcerts.wordpress.com/
>>>
>>> [2] https://tdtemcerts.blogspot.sg/
>>>
>>> [3] https://www.scribd.com/user/270125049/Teo-En-Ming
>>>
>>> -END EMAIL SIGNATURE-
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>>>
>> Already running in a VM.  BTW, Gnome is as unfriendly and downright
>> obstructive as ever. :-(
>>
>>
>> --
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>>
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> 
> -BEGIN EMAIL SIGNATURE-
> 
> The Gospel for all Targeted Individuals (TIs):
> 
> [The New York Times] Microwave Weapons Are Prime Suspect in Ills of
> U.S. Embassy Workers
> 
> Link: 
> https://www.nytimes.com/2018/09/01/science/sonic-attack-cuba-microwave.html
> 
> 
> 
> Singaporean Mr. Turritopsis Dohrnii Teo En Ming's Academic
> Qualifications as at 14 Feb 2019 and refugee seeking attempts at the
> United Nations Refugee Agency Bangkok (21 Mar 2017) and in Taiwan (5
> Aug 2019):
> 
> [1] https://tdtemcerts.wordpress.com/
> 
> [2] https://tdtemcerts.blogspot.sg/
> 
> [3] https://www.scribd.com/user/270125049/Teo-En-Ming
> 
> -END EMAIL SIGNATURE-
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Re: [CentOS] CentOS 8.0 1905 is now available for download

[J Martin Rushton via CentOS]

On 24/09/2019 12:16, Turritopsis Dohrnii Teo En Ming wrote:
> Good evening from Singapore,
> 
> Anybody downloaded, installed, and tried CentOS 8.0 1905 yet?
> 
> Download link from CentOS download mirror near to Singapore:
> 
> http://mirror.vodien.com/centos/8.0.1905/isos/x86_64/CentOS-8-x86_64-1905-dvd1.iso
> 
> The DVD ISO filesize is 6.6 GB.
> 
> I am downloading it right now...Approx. 20 mins more to download
> completion using 1 Gbps home fiber internet connection.
> 
> 
> -BEGIN EMAIL SIGNATURE-
> 
> The Gospel for all Targeted Individuals (TIs):
> 
> [The New York Times] Microwave Weapons Are Prime Suspect in Ills of
> U.S. Embassy Workers
> 
> Link: 
> https://www.nytimes.com/2018/09/01/science/sonic-attack-cuba-microwave.html
> 
> 
> 
> Singaporean Mr. Turritopsis Dohrnii Teo En Ming's Academic
> Qualifications as at 14 Feb 2019 and refugee seeking attempts at the
> United Nations Refugee Agency Bangkok (21 Mar 2017) and in Taiwan (5
> Aug 2019):
> 
> [1] https://tdtemcerts.wordpress.com/
> 
> [2] https://tdtemcerts.blogspot.sg/
> 
> [3] https://www.scribd.com/user/270125049/Teo-En-Ming
> 
> -END EMAIL SIGNATURE-
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> 
Already running in a VM.  BTW, Gnome is as unfriendly and downright
obstructive as ever. :-(


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Re: [CentOS] CUPS job handling

[J Martin Rushton via CentOS]

On 01/09/2019 13:19, hw wrote:
> On Thu, 22 Aug 2019 11:48:37 -0500 (CDT)
> Michael Hennebry  wrote:
> 
>> On Tue, 20 Aug 2019, hw wrote:
>>
>>> is it somehow possible to make CUPS automatically redirect jobs, and
>>> following jobs, away from printers which can not print them to other
>>> printers that can print them until the printers that couldn't print
>>> them are again able to print them?
>>
>> IIRC CUPS has printer classes or some such thing.
>> A user can send a job to a class and CUPS will
>> direct it within that class as it sees fit.
>> Presumaly if one printer is stil chewing on last week's job,
>> CUPS will see fit to direct subsequent jobs elsewhere.
> 
> Well, yes, and I am not sure (at least not yet) if print jobs for a
> class are diverted to other members of the class or not.  It seems
> that data kept in the printer buffer and in the print-server the
> printers are connected to can make it difficult to figure what is
> actually going on.
> 
> 
> A much bigger problem are printers that are not members of classes,
> though.  Such printers are not members of classes because they are at
> physically different locations, and employees would have to go to from
> one printer to another to collect the lables.
> 
> Yet if a printer doesn't print anymore, it is desirable to divert jobs
> to another printer, preferably a designated fallback.  It is of no use
> when the jobs get stuck in the queue until the printer is being
> maintained which can be days later.
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Jobs sent to a class will be queued on the first printer in that class
that is available.  For instance if the class "Laser" contains the
printers "WiFiPrinter" and "ColourLaser" jobs will be sent to
WiFiPrinter.  If, however, WiFiPrinter is switched off then after about
a minute the job is requeued to ColourLaser.

As regards moving jobs from non-class printer, have a look at lpmove(8).
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Re: [CentOS] initramfs annoyances (I think)

[J Martin Rushton via CentOS]

On 29/07/2019 20:58, mark wrote:
> Moved a server from the datacenter to our secure room. I've changed the
> DNS, and our dhcpd... and yet, every time it boots, it comes up with the
> IP it had in the datacenter.
> 
> Any idea where it could be caching the IP - maybe in the initramfs?
> 
> C 7, updated.
> 
>   mark
> 
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Don't shoot the messenger, but have you checked
/etc/sysconfig/network-scripts/ifcfg-* ?  For that matter, have you
checked /var/lib/dhcpd/dhcpd.leases?

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Re: [CentOS] Install virtual win server

[J Martin Rushton via CentOS]

On 15/07/2019 12:06, Nikos Gatsis - Qbit wrote:
> Hello list.
> 
> Have someone installed windows server 2019 desktop on centos 7 kvm? Any
> tips?
> 
> I have done it but I'm not sure if everything is OK. First of all, I
> cant ping the virt IP, although I connect through remote! Second, I cant
> activate windows and I'm pretty sure I have the right code...
> 
> Thank you in advance, Nikos.
> 
> 
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How is the VM connected to the internet?  If it's NATted, then you won't
be able to ping from outside.  If the VM is bridged on the host then it
will appear as another machine in the external network.

(ASCII art)

NAT:

VM +192.168.76.XX
VM +
...|
 Host + 192.168.1.XX
 ...  |
   router


Bridge:

VM +
VM +
...|192.168.1.XX
Host --+
...|
 router


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Re: [CentOS] Roughly how many more months before CentOS 8.0 release?

[J Martin Rushton via CentOS]

On 13/07/2019 01:05, Jon LaBadie wrote:
> On Fri, Jul 12, 2019 at 09:43:58AM -0500, Johnny Hughes wrote:
>> On 7/10/19 1:18 AM, Turritopsis Dohrnii Teo En Ming wrote:
>>> Good afternoon from Singapore,
>>>
>>> May I know roughly how many more months before CentOS 8.0 will be released?
>>>
>>> https://wiki.centos.org/About/Building_8
>>
>> Well .. as explained before, it is a very irritative process .. (ie ..
>> do this, test, do that, test .. rinse, repeat).
>>
>> But with where we are right now .. I don't think it will take more than
>> one more month to finish and test.
> ...
> 
> I wonder if the use of "irritative" instead of "iterative"
> was intentional, subconsciously or not.  :))
> 
> Jon
> 

It made me smile too.  It's rather a good coinage though.

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Re: [CentOS] Alternitives to Firefox...

[J Martin Rushton via CentOS]

On 27/06/2019 07:07, Rob Kampen wrote:
> On 27/06/19 7:58 AM, Robert Heller wrote:
>> OK, I recently ugraded to the current ESR release of Firefox for
>> CentOS 6.
>> And I am having problems with the user interface (basically it has
>> become hard
>> [for me] to use).
>>
>> What alternitives are there?  (Chrome and Chromium are not possible with
>> CentOS, and Chrome and Chromium are actually worse).
>>
> I have been using Vivaldi for about 6 months now on my C7 workstation,
> ever since FF dropped the ball on an update and lost all my saved
> passwords. I only have the browser store passwords for non-important
> sites, but there were dozens of them, and I DO NOT back them up onto the
> cloud to be accessible to the great un-washed.
> 
> Vivaldi is not as media player friendly i.e. for video content, but to
> be fair I haven't spent much time trying to sort that out.
> 
> I find it has some nice tools for my development work / testing, however
> also some bugs as on occasion it will not open a link when I double
> click it in say an email - Vivaldi is set as the default browser. A stop
> and start of the browser sorts that problem. I typically keep my browser
> open for weeks, or until this fault causes too much frustration. It
> remembers all my open tabs so the restart is fairly painless.
> 
> HTH
> 
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> 
I've just installed Vivaldi and came across the video test page:
https://tekeye.uk/html/html5-video-test-page

If anything doesn't work (in my case it was the MPEG test) start Vivaldi
from the command line and it will tell you what steps to take.

When I re-ran the test MPEG was fine.

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Re: [CentOS] Does CentOS support aspell?

[J Martin Rushton via CentOS]

On 08/06/2019 18:43, Frank Cox wrote:
> On Sat, 8 Jun 2019 17:27:19 - (UTC)
> Beartooth wrote:
> 
>>
>>  I haven't run CentOS on a machine of my own for several years; 
>> but my domain (NOT the address I post from) is hosted on a machine 
>> running CentOS. The list for the mailer I run recommends using aspell, 
>> which is not installed (according to rpm -q) on the remote host, as a 
>> spellchecker. 
>>
>>  Does anybody here know offhand if CentOS supports it? Or how do I 
>> check?
> 
> Name: aspell
> Epoch   : 12
> Version : 0.60.6.1
> Release : 9.el7
> Architecture: x86_64
> Install Date: Mon 15 Sep 2014 11:45:56 PM CST
> Group   : Applications/Text
> Size: 3306022
> License : LGPLv2+ and LGPLv2 and GPLv2+ and BSD
> Signature   : RSA/SHA256, Thu 03 Jul 2014 06:40:17 PM CST, Key ID 
> 24c6a8a7f4a80eb5
> Source RPM  : aspell-0.60.6.1-9.el7.src.rpm
> Build Date  : Mon 09 Jun 2014 05:04:40 PM CST
> Build Host  : worker1.bsys.centos.org
> Relocations : (not relocatable)
> Packager: CentOS BuildSystem 
> Vendor  : CentOS
> URL : http://aspell.net/
> Summary : Spell checker
> Description :
> GNU Aspell is a spell checker designed to eventually replace Ispell. It can
> either be used as a library or as an independent spell checker. Its main
> feature is that it does a much better job of coming up with possible
> suggestions than just about any other spell checker out there for the
> English language, including Ispell and Microsoft Word. It also has many
> other technical enhancements over Ispell such as using shared memory for
> dictionaries and intelligently handling personal dictionaries when more
> than one Aspell process is open at once.
> 
Don't use RPM, use yum which is the supported installer:

# yum list aspell
Loaded plugins: fastestmirror, langpacks, priorities
Loading mirror speeds from cached hostfile
 * centos-sclo-rh: mirrors.ukfast.co.uk
 * centos-sclo-sclo: centos.serverspace.co.uk
 * elrepo: mirrors.coreix.net
 * nux-dextop: li.nux.ro
Available Packages
aspell.i686  12:0.60.6.1-9.el7base
aspell.x86_6412:0.60.6.1-9.el7base

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Re: [CentOS] Firefox addons disabled - temporary fix

[J Martin Rushton via CentOS]

On 05/05/2019 22:21, wwp wrote:
> Hello Frank,
> 
> 
> On Sat, 4 May 2019 11:09:22 -0600 Frank Cox  wrote:
> 
>> The currently available fix for Firefox doesn't work with ESR, but there's a 
>> temporary fix that works.  At least, it's working for me:
>>
>> Go to about:config and set xpinstall.signatures.required to false.
> [snip]
> 
> And extensions.langpacks.signatures.required for language packs.
> 
> 
> Regards,
> 
> 
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Does anyone know what the latest on this is?  Specifically can I reset
the xpinstall.signatures.required?  My machine is running C7 patched today.

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Re: [CentOS] Bypassing 'A stop job is running' when rebooting CentOS 7

[J Martin Rushton via CentOS]

On 22/05/2019 14:43, mark wrote:
> James Pearson wrote:
>> James Pearson wrote:
>>
>>>
>>> I'm currently trying to reboot a CentOS 7.5 workstation (to complete an
>>>  upgrade to 7.6), but it is 'stuck' while shutting down with 'A stop
>>> job is running for ...' - the counter initially gave a limit of '1min
>>> 30s' -
>>> but each time it reaches that limit, it just adds on ~90 seconds to the
>>> limit ...
>>>
>>> Currently the limit is '25min 33s'
>>>
>>>
>>> I'm in no hurry to have this workstation operational, but I guess at
>>> some point I will have to power cycle it ...
>>>
>>> Does anyone know how to bypass this? - or at least stop it increasing
>>> the limit each time it is reached?
>>>
>>> It does seems rather pointless to keep increasing the limit like this
>>> ...
>>>
>> It _finally_ gave up at 30 mins and rebooted
> 
> One question: did it have a mounted nfs filesystem?
> 
> The joys of systemd
> 
>  mark
> 
>  mark
> 
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"Anything Windows can do, systemd can do better" (with apologies to
Irving Berlin).

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Re: [CentOS] root .bash_profile?

[J Martin Rushton via CentOS]

On 13/05/2019 22:25, Pete Biggs wrote:
> On Mon, 2019-05-13 at 16:20 -0400, Bee.Lists wrote:

> 
> It may not be "just another user", but it *is* a user as much as your
> login username is a user. You could assign your own username a UID of
> 0, and it would have the same privileges as 'root', but it would still
> act as your username.  NOTE: doing this is NOT recommended, do not do
> it, seriously, do NOT do it.
> 

> P.
> 
> 
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Shame that "security experts" regularly recommend using another name for
the root account - security through obscurity anyone?

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Re: [CentOS] Firefox esr repackage

[J Martin Rushton via CentOS]

Hi Nux,

The number will be higher than that.  Some large systems just download
once to their own private mirror and install from there.  Where I used
to work each download went to at least 6 systems, probably more.
Regards,
Martin

On 10/05/2019 10:12, Nux! wrote:
> I maintain a desktop oriented repo for CentOS and last I checked a year or so 
> ago, I got over 150k+ unique IPs with yum user agent downloading stuff from 
> it.
> 
> It's a bit anecdotal as perhaps not all are actual desktop users and some 
> users were using multiple IPs (dhcp), but it shows there are quite a few 
> users out there running CentOS for desktop purposes. 
> 
> There are desktop focused distros out there who do not even reach this kind 
> of numbers. How many active users do you think Mageia or Linux Mint have?
> 
> --
> Sent from the Delta quadrant using Borg technology!
> 
> Nux!
> www.nux.ro
> 
> - Original Message -
>> From: "CentOS mailing list" 
>> To: "CentOS mailing list" 
>> Sent: Friday, 10 May, 2019 05:40:38
>> Subject: Re: [CentOS] Firefox esr repackage
> 
>>> On 09/05/2019 09:09, Simon Matter via CentOS wrote:
> The price we pay.. :)

 Do you say that paying RH customers already received new firefox
 packages?

 Regards,
 Simon

>>>
>>> No, Red Hat have not yet released any updates for Firefox. I doubt it's
>>> a priority for them.
>>
>> Which makes me believe they don't expect anybody to use RHEL as a desktop
>> system :-(
>>
>> Are there any numbers showing how RHEL is used? That would be interesting.
>>
>> Regards,
>> Simon
>>
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Re: [CentOS] Resource utilisation of processes on linux server.

[J Martin Rushton via CentOS]

On 14/04/2019 16:51, Pete Biggs wrote:
> 
>>
>> Thanks for the email. I will be interested in command line interface
>> tool/utility. Is there a way to find out the previous occurrence of
>> resource utilization? For example, there was a high load on the Linux
>> server which occurred three days back during the time of 3:00 AM to 4:00 AM
>> meaning historical data.
>>
> 
> You need to look at system accounting. The command 'sa' reports on
> accounting information and the command 'accton' turns on per process
> accounting.  It's not usually turned on by default (on busy systems the
> accounting files can get large) and it's not retrospective. (So if it's
> not turned on, any per-process logs are lost once the process
> terminates.)
> 
> P.
> 
> 
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sa logs aren't usually too big, but the process logs can get pretty
large.  sa logs are usually processed overnight to sar reports which are
a good starting point (see /var/log/sa).  If you are running an audit
trail that may give you additional information, as would monitoring
tools such as Ganglia.

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Re: [CentOS] Resource utilisation of processes on linux server.

[J Martin Rushton via CentOS]

On 14/04/2019 14:17, Kaushal Shriyan wrote:
> Hi,
> 
> I have around 6 processes running on CentOS Linux release 7.6.1810 (Core).
> Is there a way to find out which process is taking resources like memory,
> CPU, I/O and network.
> 
> Process 1 : How much memory, CPU, I/O and network is currently consuming on
> linux server
> Process 2 : How much memory, CPU, I/O and network is currently consuming on
> linux server
> Process 3 : How much memory, CPU, I/O and network is currently consuming on
> linux server and so on and so forth.
> 
> Thanks in Advance and i look forward to hearing from you.
> 
> Best Regards,
> 
> Kaushal
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> 

From the command line there is always top(1).  If you want a GUI then
System Tools > System Moinitor and click on "Processes".  All the
columns are sortable.

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Re: [CentOS] CentOS 8 Artwork needed

[J Martin Rushton via CentOS]

On 07/03/2019 20:45, Rich Bowen wrote:
> To all the artists and designers here, we need your help.
> 
> With RHEL 8 beta released, we need to start producing artwork for CentOS
> 8. It's time for the CentOS Artwork SIG, and anyone else that's
> interested in contributing to this effort, to start working on
> everything that will be needed for the new release.
> 
> What we know we need is anaconda artwork, and new desktop backgrounds to
> replace the current '7' themed stuff.
> 
> As we dig, we may find more things that need to be updated to the new 8
> theme.
> 
> Additionally, we will need to update some of the assets listed here:
> https://wiki.centos.org/ArtWork/Identity
> 
> ... and produce new assets for 8 to be listed here:
> https://wiki.centos.org/ArtWork/Brand/Logo
> 
> And, finally, we need someone to step up to lead this effort.
> 
> While we don't yet know for certain when RHEL 8 will officially release,
> it's safe to assume that it's soon, and we need your help.
> 
I'm no artist, so I won't even attempt to actually create artwork.

Having said that, with the current increase in interest in space
activity the old Apollo 8 logo might give us some inspiration.  See
https://en.wikipedia.org/wiki/File:Apollo-8-patch.png for the original.

My initial though is for the CentOS logo where the earth is and some
sort of future at the Moon end.  Perhaps a star?  I'm a programmer not a
"creative" so I'll allow artistic types to decide.  If obscuring the
CentOS logo with the lower band of the "8" is unacceptable, then it
would be possible to keep the Earth and put the CentOS logo in place of
the Moon.  Not as strong a message, but still fun.

The three astronauts' names cound be replaced with the word "CentOS", a
slogan (please not "to infinity and beyond"), or simply blanked.  The
colour scheme will obviously depend upon corporate diktat.

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Re: [CentOS] time to say good-bye to win 7 / printer is the last blocker

[J Martin Rushton via CentOS]

On 22/02/2019 09:21, Pete Biggs wrote:
> On Fri, 2019-02-22 at 07:12 +0100, Ralf Prengel wrote:
>> Hallo,
>> the laptop of my wife is the last Win7 system in my network.
>> My question:
>> I need a well supported printer (MFC) with network interface, if possible 
>> with colour printing.
>>
> 
> I know this is a bit controversial since they are a bit Marmite in
> nature, but I use HP devices.  They are well supported using the most
> recent hplip package - that also provides a scan to desktop
> functionality, but I tend to use the sane packages because they better
> suit how I work.
> 
> P.
> 
> 
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> 
My recent experience is that Cannon is pretty useless.  You apparently
need the latest sane, which is more recent that CentOS provides.  I
suppose they are good as door stops.

I've used Samsung in the past and Linux support is poor, but just usable.

My latest is an HP MFP M281 which so far seems to perform well and the
control interface works with Linux.  I control it from the main CentOS
machine, but it is also directly access from other distros and from
Win6/Win7 laptops.

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Re: [CentOS] C7 basic install, HATE

[J Martin Rushton via CentOS]

On 15/02/2019 18:36, Warren Young wrote:
> On Feb 15, 2019, at 11:08 AM, mark  wrote:
>>
>> To say "spend $20..." does not relate to "have to find a workaround to do
>> it *today*", nor to "this is a  work system, I'm not driving out to
>> Microcenter to buy one”.
> 
> What’s your hourly rate?  How much did *not* driving out to Microcenter cost 
> your employer?
> 
> If you’re salaried, there’s the opportunity costs: what work did you *not* do 
> while trying to save that $20 and hour round trip?
> 
> RHEL drops old hardware constantly, roughly aligning with its ~10 year 
> support window.  It doesn’t surprise me that the early Matrox cards have 
> fallen out of support by now.
> 
> The last such deprecation to bite me was the 3ware 8000 series cards, last 
> supported on EL5 or 6.  When resuscitating such systems, we either have to 
> stick with the old OS or upgrade them to 9000 series cards — which won’t 
> attach 8000 series RAID sets — or switch array technologies entirely.
> 
> Doubtless you can throw heroic efforts at getting old X drivers to build with 
> current software, but is that a good use of your time, given the alternatives?
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> 
Not an uncommon situation though.  "Driving" - that's hugely expensive
requiring a hire car (never let ordinary grunts use their own vehicles,
it might cost more). "out" - 'elf'n'safety, have they signed off the
appropriate bit of paper, and who is checking up on the time?
"Microcenter" - do we have a preferred supplier agreement with them.
Are they even on the SAP system?  Far better to use corporate's method
since then no-one can be blamed for wastage.  "Employer" - Ahh, do you
mean the shareholders, the local business manager, or the local team
manager.  If the latter, can he shift the cost elsewhere and wring his
hands effectively?

I would add an "", but it wouldn't be appropriate here.

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Re: [CentOS] Forums down?

[J Martin Rushton via CentOS]

I've just been down all the Quick links menu, and they all fail in the
same way.  Going in from the board index I can see a post of Trevor's
from 2019/02/11 18:37:46 so it seems to be the search is failing.

On 11/02/2019 18:28, Tate Belden wrote:
> I can log in and view the forums just fine.
> 
> But yea, using your search link, I get that same 'server busy'
> Informational.
> 
> Man, looks like it's been awhile since I've visited there.
> 
> On Mon, Feb 11, 2019 at 11:20 AM J Martin Rushton via CentOS <
> centos@centos.org> wrote:
> 
>> All day I've been getting "Sorry but you cannot use search at this time.
>> The server has high load. Please try again later." from
>> https://www.centos.org/forums/search.php?search_id=unreadposts
>>
>> Is there a problem?
>>

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[CentOS] Forums down?

[J Martin Rushton via CentOS]

All day I've been getting "Sorry but you cannot use search at this time.
The server has high load. Please try again later." from
https://www.centos.org/forums/search.php?search_id=unreadposts

Is there a problem?

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Re: [CentOS] Centos 7 and backup solution

[J Martin Rushton via CentOS]

On 27/01/2019 16:59, Kenneth Porter wrote:
> --On Sunday, January 27, 2019 12:22 PM +0000 J Martin Rushton via CentOS
>  wrote:
> 
>> Backups on or by the computer might protect you from disk failures, but
>> are useless in case of fire or theft.
> 
> With ransomware and rarely-used files, it's also important to have
> generations of backups, in case an infection clobbers your recent
> backups of  files before you detect the infection.
> 
Yes, and not on the same disk!  I have three USB disks, each of which is
capable of holding half a dozen backups.  Disk 1 has slots 11-19, disk 2
21-29 and disk 3 31-39.  Backups are done in theory to 11, 21, 31, 12,
22, 32 ..., though in practice I may dump extra backups on the same disk
if I'm doing configuration or upgrade work.

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Re: [CentOS] Centos 7 and backup solution

[J Martin Rushton via CentOS]

Amanda (from base CentOS) -> USB removable disk -> firesafe.

Backups on or by the computer might protect you from disk failures, but
are useless in case of fire or theft.

On 27/01/2019 11:56, Alessandro Baggi wrote:
> Hey there,
> what type of backup solution do you use on C7?
> 
> 
> Thanks in advance
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Re: [CentOS] DNS bind - use of /etc/named directory

[J Martin Rushton via CentOS]

On 04/12/18 09:41, John Horne wrote:
> On Tue, 2018-12-04 at 08:19 +0000, J Martin Rushton via CentOS wrote:
>> The '/etc/named.conf.rpmnew' file supplied is a bare minimum to
>> "configure the ... server as a caching only nameserver (as a localhost
>> DNS resolver only)".  As soon as you start adding any structure to it
>> things change, not just are added to.  See
>> '/usr/share/doc/bind-*/sample/etc/named.conf' for example.  Probably the
>> biggest "gotcha" is that as soon as you use _any_ views you MUST use
>> views for _all_ zones.
>>
>> If you were to move the default '/etc/named.conf.rpmnew' to
>> '/etc/named.conf' and add an 'include "/etc/named/*";', line as you
>> suggest, you would be building problems for the future.  Let's say you
>> dropped in 'internal.conf' which had a simple 'view "internal" stanza -
>> then your root hints, localhost, localhost IPV6 and reverse localhosts
>> would disappear.  Just what you wouldn't want at 00:51 !
>>
>> What you can do safely is to include the zone definitions in a separate
>> file (see '/etc/named.rfc1912.zones' for example) and include that file.
>>  Doing things this way means that your main configuration file can be
>> written to either use views or not, and to just include your zone
>> definitions in the appropriate place.  See the sample file for an example.
>>
> Thanks for the reply.
> 
> However, we don't use views and the local settings are not for zones. We do
> currently have a separate zone file, but again that requires an 'include' in
> the main '/etc/named.conf'. If a local settings file (in '/etc/named') could 
> be
> used, then we would simply 'include' the zone file in that. Ultimately, the
> main named.conf file would remain untouched.
> 
> John.
> 
Since I don't know your particular configuration, the above was of
necessity rather general.  That though is the point, the default named
installation has to be generic and cover everything from a basic
installation up to a major cluster with multiple networks.  I suspect
that in your case there will be no advance on diff(1) and vi(1)!

Regards,
Martin


>>
>> On 04/12/18 00:51, John Horne wrote:
>>> Hello,
>>>
>>> For many years we have modified the '/etc/named.conf' file to include local
>>> settings. The disadvantage with this is of course that when bind is
>>> updated, it
>>> creates an '/etc/named.conf.rpmnew' file. We then have to determine what is
>>> new, and apply the relevant changes to our modified named.conf file.
>>>
>>> There is, however, an '/etc/named' directory which I assumed was for local
>>> configuration settings. The main '/etc/named.conf' file makes no mention of
>>> this directory, so (I suspect) any config files in '/etc/named' would, by
>>> default, just be ignored.
>>>
>>> As far as I can tell we could put our local configuration settings into a
>>> file
>>> in '/etc/named', but we would then, once again, have to modify
>>> '/etc/named.conf' to tell it to include config files in '/etc/named'. We
>>> would
>>> then be back at square one in that any bind update would create an 'rpmnew'
>>> file.
>>>
>>> I admit I haven't actually tested this, but has anyone used the
>>> '/etc/named'
>>> directory and not had to modify the main '/etc/named.conf' file?
>>>
>>> I suspect, if not, then this should be raised as a possible bug since it
>>> would
>>> make sense not to have to modify the main configuration file at all.
>>>
>>>
>>>
>>>
>>> Thanks,
>>>
>>> John.
>>>
>>> --
>>> John Horne | Senior Operations Analyst | Technology and Information
>>> Services
>>> University of Plymouth | Drake Circus | Plymouth | Devon | PL4 8AA | UK
>>> 
>>> [
>>> http://www.plymouth.ac.uk/images/email_footer.gif]<http://www.plymouth.ac.uk/worldclass
>>>>
>>>
>>> This email and any files with it are confidential and intended solely for
>>> the use of the recipient to whom it is addressed. If you are not the
>>> intended recipient then copying, distribution or other use of the
>>> information contained is strictly prohibited and you should not rely on it.
>>> If you have received this email in error please let the sender know
>>> immediately and delete it from your system(s). Internet emails are not
>>> necessarily secure. While we take every care, University of Plymouth
>>>

Re: [CentOS] DNS bind - use of /etc/named directory

[J Martin Rushton via CentOS]

The '/etc/named.conf.rpmnew' file supplied is a bare minimum to
"configure the ... server as a caching only nameserver (as a localhost
DNS resolver only)".  As soon as you start adding any structure to it
things change, not just are added to.  See
'/usr/share/doc/bind-*/sample/etc/named.conf' for example.  Probably the
biggest "gotcha" is that as soon as you use _any_ views you MUST use
views for _all_ zones.

If you were to move the default '/etc/named.conf.rpmnew' to
'/etc/named.conf' and add an 'include "/etc/named/*";', line as you
suggest, you would be building problems for the future.  Let's say you
dropped in 'internal.conf' which had a simple 'view "internal" stanza -
then your root hints, localhost, localhost IPV6 and reverse localhosts
would disappear.  Just what you wouldn't want at 00:51 !

What you can do safely is to include the zone definitions in a separate
file (see '/etc/named.rfc1912.zones' for example) and include that file.
 Doing things this way means that your main configuration file can be
written to either use views or not, and to just include your zone
definitions in the appropriate place.  See the sample file for an example.

HTH,

Martin

On 04/12/18 00:51, John Horne wrote:
> Hello,
> 
> For many years we have modified the '/etc/named.conf' file to include local
> settings. The disadvantage with this is of course that when bind is updated, 
> it
> creates an '/etc/named.conf.rpmnew' file. We then have to determine what is
> new, and apply the relevant changes to our modified named.conf file.
> 
> There is, however, an '/etc/named' directory which I assumed was for local
> configuration settings. The main '/etc/named.conf' file makes no mention of
> this directory, so (I suspect) any config files in '/etc/named' would, by
> default, just be ignored.
> 
> As far as I can tell we could put our local configuration settings into a file
> in '/etc/named', but we would then, once again, have to modify
> '/etc/named.conf' to tell it to include config files in '/etc/named'. We would
> then be back at square one in that any bind update would create an 'rpmnew'
> file.
> 
> I admit I haven't actually tested this, but has anyone used the '/etc/named'
> directory and not had to modify the main '/etc/named.conf' file?
> 
> I suspect, if not, then this should be raised as a possible bug since it would
> make sense not to have to modify the main configuration file at all.
> 
> 
> 
> 
> Thanks,
> 
> John.
> 
> --
> John Horne | Senior Operations Analyst | Technology and Information Services
> University of Plymouth | Drake Circus | Plymouth | Devon | PL4 8AA | UK
> 
> [http://www.plymouth.ac.uk/images/email_footer.gif]
> 
> This email and any files with it are confidential and intended solely for the 
> use of the recipient to whom it is addressed. If you are not the intended 
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> contained is strictly prohibited and you should not rely on it. If you have 
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> delete it from your system(s). Internet emails are not necessarily secure. 
> While we take every care, University of Plymouth accepts no responsibility 
> for viruses and it is your responsibility to scan emails and their 
> attachments. University of Plymouth does not accept responsibility for any 
> changes made after it was sent. Nothing in this email or its attachments 
> constitutes an order for goods or services unless accompanied by an official 
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Re: [CentOS] Red Hat is Planning To Deprecate KDE on RHEL By 2024

[J Martin Rushton via CentOS]

On 03/11/18 22:49, Robert Heller wrote:
> At Sat, 3 Nov 2018 14:38:03 + J Martin Rushton 
> ,  CentOS mailing list  
> wrote:
> 
>>
>>
>> From: J Martin Rushton 
>> To: centos@centos.org
>> Message-ID: <8a7a2aea-33da-9f3c-00a1-c6471fa02...@btinternet.com>
>> Subject: Re: [CentOS] Red Hat is Planning To Deprecate KDE on RHEL By 2024
>> References: <20181102200256.ga18...@mutt.melvilletheatre.net>  
>> <20181102203540.6de5326c2...@sharky3.deepsoft.com>  
>>   
>> <20181103023156.b332d26c2...@sharky3.deepsoft.com>
>> In-Reply-To: <20181103023156.b332d26c2...@sharky3.deepsoft.com>
>>
>> On 03/11/18 02:31, Robert Heller wrote:
>>
>> 
>>
>>> Yeah, there are very few of us that completely skipped 
>>> MS-DOS/MS-Windows/MacOS-Clasic and *never* used a graphical file manager or 
>>> any of the eye-candy that people now believe is "standard" or "normal".  I 
>>> went from VMS on a VT to a VAXStation 2000 to a VAXStation 3000, 
>>> to 
>>> DECStation 5000, to Linux, with some time spent on CP/M-68K and OS-9/68000, 
>>> as 
>>> well as SunOS, IRIX, etc.  *I* have never owned a machine running any 
>>> verison 
>>> of MS-Windows (I did have a box that dual booted MS-DOS and Linux).
>>>
>>
>> VTs?  How about a VAX 11/782 with two LA120s, one per CPU. :-)
>>
>> There were advantages in hardcopy consoles when dealing with system
>> crashes or boot problems.
> 
> I did use a LA120 on a PDP-15...

Ah, I only ran RSX on a PDP-11.  Did you ever come across the SB "Shoe
Box"-11 systems?  We used them as graphics processors on CAD
workstattions linked to the VAX by RS232 serial lines.

>>
>> Oh, I will confess to once owning W95 and W98 machines, but I do
>> remember finally issuing the command "# rm -r /C".
>>
> 

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Re: [CentOS] Red Hat is Planning To Deprecate KDE on RHEL By 2024

[J Martin Rushton via CentOS]

On 03/11/18 02:31, Robert Heller wrote:



> Yeah, there are very few of us that completely skipped 
> MS-DOS/MS-Windows/MacOS-Clasic and *never* used a graphical file manager or 
> any of the eye-candy that people now believe is "standard" or "normal".  I 
> went from VMS on a VT to a VAXStation 2000 to a VAXStation 3000, to 
> DECStation 5000, to Linux, with some time spent on CP/M-68K and OS-9/68000, 
> as 
> well as SunOS, IRIX, etc.  *I* have never owned a machine running any verison 
> of MS-Windows (I did have a box that dual booted MS-DOS and Linux).
> 

VTs?  How about a VAX 11/782 with two LA120s, one per CPU. :-)

There were advantages in hardcopy consoles when dealing with system
crashes or boot problems.

Oh, I will confess to once owning W95 and W98 machines, but I do
remember finally issuing the command "# rm -r /C".

-- 
J Martin Rushton MBCS



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Re: [CentOS] 2038 year Problem

[J Martin Rushton via CentOS]

If you do that make sure it's a system you're happy to junk and
reinstall.  I have painful memories of trying to sort out systems we
rolled forward over Y2K.  Amongst other things the license manager
became convinced we were trying to fiddle things. :-(


On 02/10/18 20:07, Gordon Messmer wrote:
> On 10/2/18 10:41 AM, Johann Fock wrote:
>> Ist the 2038 year Problem solved in CentOS 7.5 64 bit Version
> 
> 
> If you define the problem as the limitations of system clock based on a
> 32-bit representation of seconds relative to the epoch, then the answer
> is "yes."  The Linux kernel uses a 64-bit clock on 64-bit systems.
> 
> Any given application may store dates in a format of its own choosing,
> though, so its possible that applications running on CentOS 7 could
> still have a problem.
> 
> It's probably easier and faster to simply set the system clock of a test
> host to the year 2040 and test the system and its applications than it
> is to ask for opinions, though.
> 
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Re: [CentOS] OT: Linux recommendations for old Pentium PC

[J Martin Rushton via CentOS]

On 31/08/18 16:47, Yves Bellefeuille wrote:
> Gary Stainburn  wrote:

> "Old Pentium" isn't very precise; the first Pentiums were in 1993!

They were the ones nicknamed "i586.01" see
https://en.wikipedia.org/wiki/Pentium_FDIV_bug

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Re: [CentOS] odd popups

[J Martin Rushton via CentOS]

No image found.

This may be due to ABRT.  Expand the details at the bottom of the pop-up
and if the Vendor is "The ABRT Team", then the pop-up is benign.  You
can read problems you have encountered, but if a daemon or any other
user hits a problem you do not have the authority to look at their
processes.

To further check this, go to Applications>System Tools>Automatic Bug
Reporting Tool.  You can look at the "My" tab, but looking at the
"System" tab (for example) will trigger the pop-up.  Enter the root
password (if you know it) and you will see a list of System's problems.

On 21/07/18 01:41, Fred Smith wrote:
> Occasionally and without any action on my part, I get a popup
> saying I need to authenticate in order to read others' actions.
> I have no clue what this is for, so I always reject them.
> Anyone got a clue?
> 
> Image attached.
> 



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