date:20190805


On Tue, 6 Aug 2019, Peter wrote:


On 6/08/19 3:44 AM, Michael Hennebry wrote:

In any case, Centos 7 has not always been this slow.
Presumably something has changed.


Websites have gotten more resource-intensive.  You've run "yum updates" and 
now have a newer version of Firefox and/or Chrome.  Your browsing habits have 
changed and you browse with more tabs open now.


More bloated browsers are not hard to believe in.
My habits haven't change much, though. 
Mostly I use a browser for things I want

to read and things I want to download.
Maybe that is why I'd been getting along with 2GB.


I have two suggestions for you:

1.  Run a lightweight desktop such as XFCE instead of Gnome or KDE.


I'll try it.

2.  Run out and buy more RAM.  Max your system out at 4G or 8G or whatever it 
will take.  You will need it and appreciate it.


Maybe.
I open the case with fear and trepidation.
The first time I opened a PC case,
I zapped my video card installing a disk drive.
Under the impressing that memory was the most ststic-sensitive
thing in a PC, I had a friend install the DDR2 memory I'd bought.
'Twas frightening to watch: like wathing The Cat in the Hat
play with one's grandmother's favorite china.
So far as I could tell, he totally ignored the
possbility that static could do bad things.
It worked and I did not have a heart attack.

Also, what is it with DDR2 prices?
When I bought DDR2,
DDR3 was the norm and I paid hundreds of dollars for DDR2.
Do not remember for how much.
Now I suspect DDR4 is the norm and am seeing 8GB of DDR2 for less than $30.
Huh? DDR3 isn't much more.

I'll need to do some digging to discover whether my box needs DDR2 or DDR3.DDR3 
I doubt it's DDR4.



--
Michael   henne...@web.cs.ndsu.nodak.edu
"Sorry but your password must contain an uppercase letter, a number,
a haiku, a gang sign, a heiroglyph, and the blood of a virgin."
 --  someeecards
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Re: [CentOS] Peculiar process name in /proc

2019-08-05 Thread Mark Milhollan


On Mon, 5 Aug 2019, John Horne wrote:


lrwxrwxrwx. 1 xymon xymon 0 Aug  2 14:07 /proc/58032/exe -> 
/usr/sbin/xymond;5d44410e (deleted)

I am aware of what the 'deleted' part means, but have no idea what the
';5d44410e' part means. Is this some sort of thread reference?


IIRC that's the inode of the file, that still exists until the last 
reference goes away.  Restarting the service, perhaps as part of a 
reboot, will end the reference and free the inode causing the new file 
to be used.



/mark
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Re: [CentOS] browsers slowing Centos 7 installation to a crawl


On Mon, 5 Aug 2019, Richard wrote:


Does the system slow down when you have your internet connection
enabled, but aren't explicitly using it (i.e., not using a browser)?


The slowdown only happens when the browser is open,
but I do not have to be using it.


If so, look at the netstat output (as root) to see what's going on.
You may have some process that runs when the connection is enabled
that is taking up system/network resources.

Separately, turn off javascript in the browser you are using and see
if that has an effect.


--
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"Sorry but your password must contain an uppercase letter, a number,
a haiku, a gang sign, a heiroglyph, and the blood of a virgin."
 --  someeecards
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Re: [CentOS] gem install reel on Centos 7

Thanks John,

I did the yum remove on rh-ruby22*
did a yum install rh-ruby23-ruby
then I found the rh-ruby23-ruby-devel  and now it works.

Jerry

>
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Re: [CentOS] browsers slowing Centos 7 installation to a crawl

2019-08-05 Thread Pete Biggs



> In any case, Centos 7 has not always been this slow.
> Presumably something has changed.

Firefox especially, and to some extent Chrome, have both started using
much more memory recently (as in the last six months or so).  I run 50+
desktops on CentOS and I've noticed more and more of them getting low
on memory more often and almost always Firefox is the culprit. These
are systems with 8Gb that are struggling.

P.


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Re: [CentOS] browsers slowing Centos 7 installation to a crawl

Peter wrote:
> On 6/08/19 6:33 AM, Richard wrote:
>
>>> Javascript - if you're using firefox, install NoScript last week.
>>>
>>
>> NoScript selectively blocks javascript, it doesn't turn it off --
>> which for testing purposes, at least, is the goal.
>>
>> In ff -- about:config - then enter "javascript" in the search line
>> and set "javascript.enabled" to false.
>>
>> With chrome this can be done in the advanced settings section, under
>> "site settings".
>>
>
> This will cause almost complete breakage of an increasing number of
> modern websites.  The vast majority of sites nowadays absolutely rely on JS
> and will not run or display correctly without it.

Horse hockey. I read a lot of news, and other stuff. Lessee, slashdot, I
enable itself, and fsdn, I think it is, and I'm fine. WaPo is fine.

Just pick and choose. I will admit to being aggravated since google
*requires* gstatic to be enabled - I assume that's where they're tracking
me.

 mark

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Re: [CentOS] gem install reel on Centos 7

2019-08-05 Thread John Pierce

On Mon, Aug 5, 2019 at 5:01 AM Jerry Geis  wrote:

> Thanks John for the info... I did that and now I'm missing a file.
> I tried to ask yum what package I need - but It did not know.
>
>
> Building native extensions.  This could take a while...
> ERROR: Failed to build gem native extension.
>
> /opt/rh/rh-ruby22/root/usr/bin/ruby -r
> ./siteconf20190805-94063-1gebs0u.rb extconf.rb
> mkmf.rb can't find header files for ruby at
> /opt/rh/rh-ruby22/root/usr/share/include/ruby.h

most typically .h files are included in a -dev package, but I dunno about
this one.   googling rh-ruby22, I find, oops, its EOL, and replaced with
rh-ruby23

https://www.softwarecollections.org/en/scls/rhscl/rh-ruby23/

btw, with the SCL stuff, note the "scl enable rh-ruby23 bash" command, that
spawns you a shell with that packages directories in the path... that might
make this work. see that page for more details, including a gem run.

-- 
-john r pierce
  recycling used bits in santa cruz
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Re: [CentOS] browsers slowing Centos 7 installation to a crawl

Richard wrote:
>> Date: Monday, August 05, 2019 13:38:49 -0400
>> From: mark 
>
>>> Richard wrote:
>>>
>>> Does the system slow down when you have your internet connection
>>> enabled, but aren't explicitly using it (i.e., not using a browser)? If
>>> so, look at the netstat output (as root) to see what's going on. You
>>> may have some process that runs when the connection is enabled that is
>>> taking up system/network resources.
>>>
>>> Separately, turn off javascript in the browser you are using and
>>> see if that has an effect.
>>>
>> Javascript - if you're using firefox, install NoScript last week.
>>
> NoScript selectively blocks javascript, it doesn't turn it off --
> which for testing purposes, at least, is the goal.
>
> In ff -- about:config - then enter "javascript" in the search line
> and set "javascript.enabled" to false.
>
> With chrome this can be done in the advanced settings section, under
> "site settings".

Right... but it also prevents the site's javascript from loading 15 other
pages, including doubleclick, or gigya (really?) or adserver

  mark

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Re: [CentOS] browsers slowing Centos 7 installation to a crawl

2019-08-05 Thread Peter


On 6/08/19 6:33 AM, Richard wrote:

Javascript - if you're using firefox, install NoScript last week.


NoScript selectively blocks javascript, it doesn't turn it off --
which for testing purposes, at least, is the goal.

In ff -- about:config - then enter "javascript" in the search line
and set "javascript.enabled" to false.

With chrome this can be done in the advanced settings section, under
"site settings".


This will cause almost complete breakage of an increasing number of 
modern websites.  The vast majority of sites nowadays absolutely rely on 
JS and will not run or display correctly without it.



Peter
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Re: [CentOS] browsers slowing Centos 7 installation to a crawl

2019-08-05 Thread Peter


On 6/08/19 3:44 AM, Michael Hennebry wrote:

In any case, Centos 7 has not always been this slow.
Presumably something has changed.


Websites have gotten more resource-intensive.  You've run "yum updates" 
and now have a newer version of Firefox and/or Chrome.  Your browsing 
habits have changed and you browse with more tabs open now.


Firefox for me has always had some amount of RAM leakage and when I used 
to run with 4G of RAM I had to restart it frequently (but I browse with 
a lot of tabs open).  I currently have my system maxed at 8G and still 
have to restart FF every couple of days or so to stop the system from 
swapping.  2G wouldn't even give me enough RAM to not run a browser on 
my system, so I can only imagine that your usage to date has been 
extremely simple.


I have two suggestions for you:

1.  Run a lightweight desktop such as XFCE instead of Gnome or KDE.

2.  Run out and buy more RAM.  Max your system out at 4G or 8G or 
whatever it will take.  You will need it and appreciate it.



Good Luck,


Peter
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Re: [CentOS] Question on server speed

2019-08-05 Thread Jon Pruente

On Mon, Aug 5, 2019 at 2:01 PM Jerry Geis  wrote:

> Anyway to use "nice" command to help with responiveness?   I was just using
> "rsync . /media/external" to do the copy.
>

You need to discover where it is blocking before deciding which solution
will work. Something like iotop, atop, or other more wide system monitoring
util will be more valuable than top/htop at this point since you seem to be
sure that's it's not the processor usage that is the issue. nice will only
work for scheduling processor use. There is the ionice command that can be
used to set I/O priority. It really doesn't sound like you have a problem
with process scheduling, so it's is probably more down the line of what you
would want to try depending on what a system util tells you.
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Re: [CentOS] Question on server speed

There are no errors in dmesg.

Top was showing 88% idle.

If something is blocking somewhere as Stephen suggested - that's a major
bummer.
The keyboard is USB attached and the external SSD disk is USB attached.
The mother board is an X299 UD4 Pro
Anyway to use "nice" command to help with responiveness?   I was just using
"rsync . /media/external" to do the copy.

Thanks,

Jerry
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Re: [CentOS] Question on server speed

2019-08-05 Thread Gordon Messmer


On 8/5/19 10:17 AM, Jerry Geis wrote:

Do I need to 'tweak' something to no see GUI freezes... Waiting on
characters to show - even remoted in with SSH experiences the same thing -
so its not just X.



Look at the output of "dmesg" and see if there are errors there.

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Re: [CentOS] browsers slowing Centos 7 installation to a crawl

2019-08-05 Thread Richard




> Date: Monday, August 05, 2019 13:38:49 -0400
> From: mark 

>> Richard wrote: 
>> 
>> Does the system slow down when you have your internet connection
>> enabled, but aren't explicitly using it (i.e., not using a
>> browser)? If so, look at the netstat output (as root) to see
>> what's going on. You may have some process that runs when the
>> connection is enabled that is taking up system/network resources.
>> 
>> Separately, turn off javascript in the browser you are using and
>> see if that has an effect.
>> 
> Javascript - if you're using firefox, install NoScript last week.
> 
>   mark
> 

NoScript selectively blocks javascript, it doesn't turn it off --
which for testing purposes, at least, is the goal.

In ff -- about:config - then enter "javascript" in the search line
and set "javascript.enabled" to false.

With chrome this can be done in the advanced settings section, under
"site settings".

   - Richard



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Re: [CentOS] C7 Kernel module compilation

On Mon, Aug 5, 2019 at 9:21 AM Alessandro Baggi
 wrote:
>
> Il 05/08/19 18:07, Akemi Yagi ha scritto:
> > On Mon, Aug 5, 2019 at 9:01 AM Alessandro Baggi
> >  wrote:

> > Do you have secureboot enabled? Then yes, that requires a proper key.
> >
> > Akemi
>
> Yes I have secureboot enabled. If usefull to others in list this could
> helps:
>
> https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Kernel_Administration_Guide/sect-signing-kernel-modules-for-secure-boot.html
>
> I think also that  centos's wiki must be updated because steps are valid
> for centos 5 and because key-signing is required for secure boot I think
> that a proper section must be inserted.

Update not finished yet but the above link has been added near the top
of the wiki article.

Akemi
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Re: [CentOS] Question on server speed

Jerry Geis wrote:
>
> I have a customer server with 32 cores, 128G ram i7960X. So nice box...
>
> Why is it that "all" I am really doing at the moment is copying things to
>  an external SSD disk USB3 connected and the machine "freezes"... Why is
> that?
>
> clearly plenty of CPU RAM everything... I can see "blocking" to write data
> to the external disk - but there are 31 other cores and plenty of memory
> to make it "seem" as nothing is happening right now.
>
> Do I need to 'tweak' something to no see GUI freezes... Waiting on
> characters to show - even remoted in with SSH experiences the same thing -
>  so its not just X.
>
> Thanks for any suggestions.
>
What's top show? And maybe iostat?

 mark

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Re: [CentOS] browsers slowing Centos 7 installation to a crawl

Richard wrote:
>> Date: Monday, August 05, 2019 10:44:00 -0500
>> From: Michael Hennebry 
>>
>> To be clear, by "Centos 7 installation",
>> I meant a PC on which Centos 7 was installed.
>>
>> In any case, Centos 7 has not always been this slow.
>> Presumably something has changed.
>> I've been living with this for several months,
>> but not forever. I can run compilers and stuff without an internet
>> connection, so I could get some work done.
>>
>> To get that output, I had free running in a loop and waited for
>> the freeze before copy and pasting.
>>
>> I wasn't surprised by the result.
>> Occasionally top shows kswap0 (I think) in a D state.
>>
>
> Does the system slow down when you have your internet connection
> enabled, but aren't explicitly using it (i.e., not using a browser)? If so,
> look at the netstat output (as root) to see what's going on. You may have
> some process that runs when the connection is enabled that is taking up
> system/network resources.
>
> Separately, turn off javascript in the browser you are using and see
> if that has an effect.
>
Javascript - if you're using firefox, install NoScript last week.

  mark

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Re: [CentOS] Question on server speed

2019-08-05 Thread Stephen John Smoogen

On Mon, 5 Aug 2019 at 13:17, Jerry Geis  wrote:

> Hi all,
>
> I have a customer server with 32 cores, 128G ram i7960X. So nice box...
>
> Why is it that "all" I am really doing at the moment is copying things to
> an external SSD disk USB3 connected and the machine "freezes"... Why is
> that?
>
>
You may have a motherboard which is routing a lot through a single USB
controller. When that happens your graphical workstation will slow down
because your keyboard and mouse events and some other polling has to
complete before it can do the next thing. THis has nothing to do with the
amount of RAM or cores in the system.. the hardware itself has been
designed to have a blocking unit on it as can be seen by the fact that
network logins are also freezing.




> clearly plenty of CPU RAM everything...
> I can see "blocking" to write data to the external disk - but there are 31
> other cores and plenty of memory to make it "seem" as nothing is happening
> right now.
>
>
Those 31 cores are waiting for the hardware backbus to be opened up for
writing. Until that happens they are just spinning. Some of this depends on
how the motherboard is designed and some of this may be x86 architecture
issues.



> Do I need to 'tweak' something to no see GUI freezes... Waiting on
> characters to show - even remoted in with SSH experiences the same thing -
> so its not just X.
>
> Thanks for any suggestions.
>
> Jerry
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[CentOS] Question on server speed

Hi all,

I have a customer server with 32 cores, 128G ram i7960X. So nice box...

Why is it that "all" I am really doing at the moment is copying things to
an external SSD disk USB3 connected and the machine "freezes"... Why is
that?

clearly plenty of CPU RAM everything...
I can see "blocking" to write data to the external disk - but there are 31
other cores and plenty of memory to make it "seem" as nothing is happening
right now.

Do I need to 'tweak' something to no see GUI freezes... Waiting on
characters to show - even remoted in with SSH experiences the same thing -
so its not just X.

Thanks for any suggestions.

Jerry
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Re: [CentOS] browsers slowing Centos 7 installation to a crawl

2019-08-05 Thread Richard




> Date: Monday, August 05, 2019 10:44:00 -0500
> From: Michael Hennebry 
> 
> To be clear, by "Centos 7 installation",
> I meant a PC on which Centos 7 was installed.
> 
> In any case, Centos 7 has not always been this slow.
> Presumably something has changed.
> I've been living with this for several months,
> but not forever.
> I can run compilers and stuff without an internet connection,
> so I could get some work done.
> 
> To get that output, I had free running in a loop and waited for
> the freeze before copy and pasting.
> 
> I wasn't surprised by the result.
> Occasionally top shows kswap0 (I think) in a D state.

Does the system slow down when you have your internet connection
enabled, but aren't explicitly using it (i.e., not using a browser)?
If so, look at the netstat output (as root) to see what's going on.
You may have some process that runs when the connection is enabled
that is taking up system/network resources.

Separately, turn off javascript in the browser you are using and see
if that has an effect.

   - Richard



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Re: [CentOS] C7 Kernel module compilation

Il 05/08/19 18:07, Akemi Yagi ha scritto:

On Mon, Aug 5, 2019 at 9:01 AM Alessandro Baggi
wrote:

Il 05/08/19 17:49, Akemi Yagi ha scritto:

On Mon, Aug 5, 2019 at 8:42 AM Alessandro Baggi
wrote:

Il 05/08/19 17:30, Akemi Yagi ha scritto:

On Mon, Aug 5, 2019 at 6:46 AM Alessandro Baggi
wrote:

Hey there,
I'm trying to compile a single module following this guide:

https://wiki.centos.org/HowTos/BuildingKernelModules#head-d2e4c05886f94c701e4ae74387d41d8c40c25d01

and

https://wiki.centos.org/HowTos/I_need_the_Kernel_Source

I tried to compile a module for novuton led controller supplied by
thirdparty and I got several error.

To check if this is the wrong procedure I tried to compile cifs module
as listed in howto but when loading with modprobe I get "Exec format
error", and from dmesg "cifs: no symbol version for module_layout
", the same errors when compiling novuton module and I don't know why I
get this error.

When following the instructions in BuildingKernelModules, which kernel
version did you use? Also, after the "depmod -a" step, what is the
output from:

$ modinfo cifs | grep filename

I noticed that modules in centos are compressed in .xz but after running
make M=fs/cifs I got only a .ko kernel module and then I run xz to
compress the new module.

Compressing modules is optional. Uncompressed form is functionally the
same (of course it saves some disk space).

Can someone help me please?

Thanks in advance.

Akemi

Hi Akemi,
thank you for your answer.

Kernel version used is 3.10.0-957.27.2.el7.x86_64

[root@c7-test SPECS]# modinfo cifs | grep filename
filename: /lib/modules/3.10.0-957.27.2.el7.x86_64/extra/cifs.ko

Looking good. I assume your running kernel is 3.10.0-957.27.2.el7 ?

Akemi

Reading from dmesg seems that the module is not accepted by kernel due
to invalid signature. I need to sign the module with a key?

Do you have secureboot enabled? Then yes, that requires a proper key.

Akemi
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Yes I have secureboot enabled. If usefull to others in list this could
helps:

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Kernel_Administration_Guide/sect-signing-kernel-modules-for-secure-boot.html

I think also that centos's wiki must be updated because steps are valid
for centos 5 and because key-signing is required for secure boot I think
that a proper section must be inserted.

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Re: [CentOS] C7 Kernel module compilation

On Mon, Aug 5, 2019 at 9:01 AM Alessandro Baggi
 wrote:
>
> Il 05/08/19 17:49, Akemi Yagi ha scritto:
> > On Mon, Aug 5, 2019 at 8:42 AM Alessandro Baggi
> >  wrote:
> >>
> >> Il 05/08/19 17:30, Akemi Yagi ha scritto:
> >>> On Mon, Aug 5, 2019 at 6:46 AM Alessandro Baggi
> >>>  wrote:
> 
>  Hey there,
>  I'm trying to compile a single module following this guide:
> 
>  https://wiki.centos.org/HowTos/BuildingKernelModules#head-d2e4c05886f94c701e4ae74387d41d8c40c25d01
> 
>  and
> 
>  https://wiki.centos.org/HowTos/I_need_the_Kernel_Source
> 
>  I tried to compile a module for novuton led controller supplied by
>  thirdparty and I got several error.
> 
>  To check if this is the wrong procedure I tried to compile cifs module
>  as listed in howto but when loading with modprobe I get "Exec format
>  error", and from dmesg "cifs: no symbol version for module_layout
>  ", the same errors when compiling novuton module and I don't know why I
>  get this error.
> >>>
> >>> When following the instructions in BuildingKernelModules, which kernel
> >>> version did you use? Also, after the "depmod -a" step, what is the
> >>> output from:
> >>>
> >>> $ modinfo cifs | grep filename
> >>>
>  I noticed that modules in centos are compressed in .xz but after running
>  make M=fs/cifs I got only a .ko kernel module and then I run xz to
>  compress the new module.
> >>>
> >>> Compressing modules is optional. Uncompressed form is functionally the
> >>> same (of course it saves some disk space).
> >>>
>  Can someone help me please?
> 
>  Thanks in advance.
> >>>
> >>> Akemi
> >>
> >> Hi Akemi,
> >> thank you for your answer.
> >>
> >> Kernel version used is 3.10.0-957.27.2.el7.x86_64
> >>
> >> [root@c7-test SPECS]# modinfo cifs | grep filename
> >> filename:   /lib/modules/3.10.0-957.27.2.el7.x86_64/extra/cifs.ko
> >
> > Looking good. I assume your running kernel is 3.10.0-957.27.2.el7 ?
> >
> > Akemi

> Reading from dmesg seems that the module is not accepted by kernel due
> to invalid signature. I need to sign the module with a key?

Do you have secureboot enabled? Then yes, that requires a proper key.

Akemi
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Re: [CentOS] C7 Kernel module compilation

Il 05/08/19 17:49, Akemi Yagi ha scritto:

On Mon, Aug 5, 2019 at 8:42 AM Alessandro Baggi
wrote:

Il 05/08/19 17:30, Akemi Yagi ha scritto:

On Mon, Aug 5, 2019 at 6:46 AM Alessandro Baggi
wrote:

Hey there,
I'm trying to compile a single module following this guide:

https://wiki.centos.org/HowTos/BuildingKernelModules#head-d2e4c05886f94c701e4ae74387d41d8c40c25d01

and

https://wiki.centos.org/HowTos/I_need_the_Kernel_Source

I tried to compile a module for novuton led controller supplied by
thirdparty and I got several error.

When following the instructions in BuildingKernelModules, which kernel
version did you use? Also, after the "depmod -a" step, what is the
output from:

$ modinfo cifs | grep filename

I noticed that modules in centos are compressed in .xz but after running
make M=fs/cifs I got only a .ko kernel module and then I run xz to
compress the new module.

Compressing modules is optional. Uncompressed form is functionally the
same (of course it saves some disk space).

Can someone help me please?

Thanks in advance.

Akemi

Hi Akemi,
thank you for your answer.

Kernel version used is 3.10.0-957.27.2.el7.x86_64

[root@c7-test SPECS]# modinfo cifs | grep filename
filename: /lib/modules/3.10.0-957.27.2.el7.x86_64/extra/cifs.ko

Looking good. I assume your running kernel is 3.10.0-957.27.2.el7 ?

Akemi
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Reading from dmesg seems that the module is not accepted by kernel due
to invalid signature. I need to sign the module with a key?

Thanks in advance
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Re: [CentOS] C7 Kernel module compilation

On Mon, Aug 5, 2019 at 8:42 AM Alessandro Baggi
 wrote:
>
> Il 05/08/19 17:30, Akemi Yagi ha scritto:
> > On Mon, Aug 5, 2019 at 6:46 AM Alessandro Baggi
> >  wrote:
> >>
> >> Hey there,
> >> I'm trying to compile a single module following this guide:
> >>
> >> https://wiki.centos.org/HowTos/BuildingKernelModules#head-d2e4c05886f94c701e4ae74387d41d8c40c25d01
> >>
> >> and
> >>
> >> https://wiki.centos.org/HowTos/I_need_the_Kernel_Source
> >>
> >> I tried to compile a module for novuton led controller supplied by
> >> thirdparty and I got several error.
> >>
> >> To check if this is the wrong procedure I tried to compile cifs module
> >> as listed in howto but when loading with modprobe I get "Exec format
> >> error", and from dmesg "cifs: no symbol version for module_layout
> >> ", the same errors when compiling novuton module and I don't know why I
> >> get this error.
> >
> > When following the instructions in BuildingKernelModules, which kernel
> > version did you use? Also, after the "depmod -a" step, what is the
> > output from:
> >
> > $ modinfo cifs | grep filename
> >
> >> I noticed that modules in centos are compressed in .xz but after running
> >> make M=fs/cifs I got only a .ko kernel module and then I run xz to
> >> compress the new module.
> >
> > Compressing modules is optional. Uncompressed form is functionally the
> > same (of course it saves some disk space).
> >
> >> Can someone help me please?
> >>
> >> Thanks in advance.
> >
> > Akemi
>
> Hi Akemi,
> thank you for your answer.
>
> Kernel version used is 3.10.0-957.27.2.el7.x86_64
>
> [root@c7-test SPECS]# modinfo cifs | grep filename
> filename:   /lib/modules/3.10.0-957.27.2.el7.x86_64/extra/cifs.ko

Looking good. I assume your running kernel is 3.10.0-957.27.2.el7 ?

Akemi
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Re: [CentOS] browsers slowing Centos 7 installation to a crawl


On Mon, 5 Aug 2019, Peter wrote:


On 5/08/19 10:42 AM, Michael Hennebry wrote:
Mem:    2020144 1454904   76140  204764  489100 
135004

Swap:   4883724  978480 3905244


free -h is generally more readable, but...

It's RAM.  You basically have a total of 2G ram on the system, you have 
less than 500M available and are into swap by nearly 1G, so you're 
swapping heavily.  2G is enough for a minimal install but browsers such 
as firefox and chrome can easily use a lot of memory fast and trying to 
run one on a 2G system while doing an install at the same time will get 
you swapping and slow the system to a crawl.


To be clear, by "Centos 7 installation",
I meant a PC on which Centos 7 was installed.

In any case, Centos 7 has not always been this slow.
Presumably something has changed.
I've been living with this for several months,
but not forever.
I can run compilers and stuff without an internet connection,
so I could get some work done.

To get that output, I had free running in a loop and waited for
the freeze before copy and pasting.

I wasn't surprised by the result.
Occasionally top shows kswap0 (I think) in a D state.

--
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a haiku, a gang sign, a heiroglyph, and the blood of a virgin."
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Re: [CentOS] C7 Kernel module compilation


Il 05/08/19 17:30, Akemi Yagi ha scritto:

On Mon, Aug 5, 2019 at 6:46 AM Alessandro Baggi
 wrote:


Hey there,
I'm trying to compile a single module following this guide:

https://wiki.centos.org/HowTos/BuildingKernelModules#head-d2e4c05886f94c701e4ae74387d41d8c40c25d01

and

https://wiki.centos.org/HowTos/I_need_the_Kernel_Source

I tried to compile a module for novuton led controller supplied by
thirdparty and I got several error.

To check if this is the wrong procedure I tried to compile cifs module
as listed in howto but when loading with modprobe I get "Exec format
error", and from dmesg "cifs: no symbol version for module_layout
", the same errors when compiling novuton module and I don't know why I
get this error.


When following the instructions in BuildingKernelModules, which kernel
version did you use? Also, after the "depmod -a" step, what is the
output from:

$ modinfo cifs | grep filename


I noticed that modules in centos are compressed in .xz but after running
make M=fs/cifs I got only a .ko kernel module and then I run xz to
compress the new module.


Compressing modules is optional. Uncompressed form is functionally the
same (of course it saves some disk space).


Can someone help me please?

Thanks in advance.


Akemi
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Hi Akemi,
thank you for your answer.

Kernel version used is 3.10.0-957.27.2.el7.x86_64

[root@c7-test SPECS]# modinfo cifs | grep filename
filename:   /lib/modules/3.10.0-957.27.2.el7.x86_64/extra/cifs.ko

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Re: [CentOS] browsers slowing Centos 7 installation to a crawl


On Sun, 4 Aug 2019, John Pierce wrote:


So you need to modify the source file that NetworkManager is using.
somewhere in /etc/network or /etc/networking-scripts, a config file has
DNS0=192.168.0.1  or sokmething, or your system is getting that from DHCP


Will check on that.


the web login on 192.168.0.1 is undoubtably your modem/router.


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Re: [CentOS] C7 Kernel module compilation

On Mon, Aug 5, 2019 at 6:46 AM Alessandro Baggi
 wrote:
>
> Hey there,
> I'm trying to compile a single module following this guide:
>
> https://wiki.centos.org/HowTos/BuildingKernelModules#head-d2e4c05886f94c701e4ae74387d41d8c40c25d01
>
> and
>
> https://wiki.centos.org/HowTos/I_need_the_Kernel_Source
>
> I tried to compile a module for novuton led controller supplied by
> thirdparty and I got several error.
>
> To check if this is the wrong procedure I tried to compile cifs module
> as listed in howto but when loading with modprobe I get "Exec format
> error", and from dmesg "cifs: no symbol version for module_layout
> ", the same errors when compiling novuton module and I don't know why I
> get this error.

When following the instructions in BuildingKernelModules, which kernel
version did you use? Also, after the "depmod -a" step, what is the
output from:

$ modinfo cifs | grep filename

> I noticed that modules in centos are compressed in .xz but after running
> make M=fs/cifs I got only a .ko kernel module and then I run xz to
> compress the new module.

Compressing modules is optional. Uncompressed form is functionally the
same (of course it saves some disk space).

> Can someone help me please?
>
> Thanks in advance.

Akemi
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Re: [CentOS] Strange apache problem

2019-08-05 Thread Gordon Messmer


On 8/5/19 5:01 AM, Nikos Gatsis - Qbit wrote:

On 8/2/2019 6:23 AM, Nikos Gatsis - Qbit wrote:

After update last centos packages, greek characters from sql request
look like question marks ?
After hours of tryingΒ  to find out what happens, I found out that 
updated freetds and after httpd update cause this problem. I add 
client charset = ISO-8859-7 in freetds.conf and everything seems to 
work fine.
I'm not sure if this is right, because all pages are in UTF8. But 
adding this set to .conf dont work correct.

Is there someone familiar with freetds to explain me



I'm not familiar with freetds specifically, but the solution you 
describe suggests that while your pages are encoded in UTF-8, data from 
the SQL server was using a different encoding, and the server was mixing 
data in the two encodings into a single response to the client 
(browser).  Indicating the SQL server encoding in freetds.conf might 
have given httpd the information it needed to convert the SQL data into 
UTF-8, creating a coherent response to the client.


If you have time to investigate further, I'd suggest looking for a way 
to request UTF-8 from the SQL server (which might mean changing the 
setting in freetds.conf, or removing it and requesting UTF-8 
elsewhere).  Your current situation will work for Greek characters, but 
you'll be unable to save or view characters from other languages.


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[CentOS] C7 Kernel module compilation


Hey there,
I'm trying to compile a single module following this guide:

https://wiki.centos.org/HowTos/BuildingKernelModules#head-d2e4c05886f94c701e4ae74387d41d8c40c25d01

and

https://wiki.centos.org/HowTos/I_need_the_Kernel_Source

I tried to compile a module for novuton led controller supplied by 
thirdparty and I got several error.


To check if this is the wrong procedure I tried to compile cifs module 
as listed in howto but when loading with modprobe I get "Exec format 
error", and from dmesg "cifs: no symbol version for module_layout
", the same errors when compiling novuton module and I don't know why I 
get this error.


I noticed that modules in centos are compressed in .xz but after running 
make M=fs/cifs I got only a .ko kernel module and then I run xz to 
compress the new module.


Can someone help me please?

Thanks in advance.
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Re: [CentOS] Peculiar process name in /proc




On 05/08/2019 13:44, John Horne wrote:

On Mon, 2019-08-05 at 13:06 +0100, Giles Coochey wrote:

On 05/08/2019 12:56, John Horne wrote:


I was going to say no to both of these, however the RPM package ('xymon') was
itself updated at around the time mentioned on Aug 02.
The hex number is equivalent to 1564754190 in decimal which, as an epoch time,
is '2019-08-02 14:56:30'. So it might be possible that '/usr/sbin/xymond' was
replaced and the hex number just indicates the time that occurred.
It might be explained that the file doesn't get deleted until its file 
handles are released?


The downside is that the package update was a bit earlier than 14:56 though, so
the numbers don't seem to quite match up. Secondly, the whole xymon process was
restarted, but the server itself not rebooted, so I would expect all the
processes to be using the new executables rather than an older/deleted one. (I
am a little loath to restart the service at the moment as I may well lose the
info currently in '/proc/.../exe'.)

Did you upgrade xymon, or perhaps install it from a different 
maintainers RPM from the original one, or perhaps the original one 
wasn't an RPM install at all?


In these cases, the old running process in /proc/pid/exe is probably the 
original one, which the new install tried to restart / but because of a 
discrepancy in what is in /var/run it didn't quite work out as planned.


I think to truly understand this we might need more background 
information and a journal of what tasks were carried out.


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Re: [CentOS] Peculiar process name in /proc

2019-08-05 Thread John Horne

On Mon, 2019-08-05 at 13:06 +0100, Giles Coochey wrote:
> On 05/08/2019 12:56, John Horne wrote:
> > Hello,
> >
> > I was looking at a process through the '/proc' file system, and came across
> > a process name which seemed to contain a hex value:
> >
> > lrwxrwxrwx. 1 xymon xymon 0 Aug  2 14:07 /proc/58032/exe ->
> > /usr/sbin/xymond;5d44410e (deleted)
> >
> > I am aware of what the 'deleted' part means, but have no idea what the
> > ';5d44410e' part means. Is this some sort of thread reference?
> > The file '/usr/sbin/xymond' does exist and is running as a daemon.
> >
> > Anyone know what the ';5d44410e' is referring to? I have tried Googling
> > about this, but found no mention of it.
> >
> >
> I am not absolutely sure, but is it saying that /usr/sbin/xymond was
> deleted, but was located at that inode reference on the disk?
>
The hex number is quite large, and too big I suspect for the number of inodes
allowed on the partition.

> I know you say it exists, but perhaps it was deleted since running and
> then re-created? or perhaps it is an self-modifying executable?
>
I was going to say no to both of these, however the RPM package ('xymon') was
itself updated at around the time mentioned on Aug 02.
The hex number is equivalent to 1564754190 in decimal which, as an epoch time,
is '2019-08-02 14:56:30'. So it might be possible that '/usr/sbin/xymond' was
replaced and the hex number just indicates the time that occurred.

The downside is that the package update was a bit earlier than 14:56 though, so
the numbers don't seem to quite match up. Secondly, the whole xymon process was
restarted, but the server itself not rebooted, so I would expect all the
processes to be using the new executables rather than an older/deleted one. (I
am a little loath to restart the service at the moment as I may well lose the
info currently in '/proc/.../exe'.)

John.

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University of Plymouth | Drake Circus | Plymouth | Devon | PL4 8AA | UK

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Re: [CentOS] Peculiar process name in /proc




On 05/08/2019 12:56, John Horne wrote:

Hello,

I was looking at a process through the '/proc' file system, and came across a
process name which seemed to contain a hex value:

lrwxrwxrwx. 1 xymon xymon 0 Aug  2 14:07 /proc/58032/exe ->
/usr/sbin/xymond;5d44410e (deleted)

I am aware of what the 'deleted' part means, but have no idea what the
';5d44410e' part means. Is this some sort of thread reference?
The file '/usr/sbin/xymond' does exist and is running as a daemon.

Anyone know what the ';5d44410e' is referring to? I have tried Googling about
this, but found no mention of it.


I am not absolutely sure, but is it saying that /usr/sbin/xymond was 
deleted, but was located at that inode reference on the disk?


I know you say it exists, but perhaps it was deleted since running and 
then re-created? or perhaps it is an self-modifying executable?


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Re: [CentOS] Strange apache problem

2019-08-05 Thread Nikos Gatsis - Qbit



On 5/8/2019 1:20 μ.μ., Nikos Gatsis - Qbit wrote:


On 3/8/2019 3:00 ΞΌ.ΞΌ., centos-requ...@centos.org wrote:

On 8/2/2019 6:23 AM, Nikos Gatsis - Qbit wrote:

After update last centos packages, greek characters from sql request
look like question marks ?

Inspect the raw binary of the HTTP request.

What browser is doing the rendering?


After hours of tryingΒ  to find out what happens, I found out that 
updated freetds and after httpd update cause this problem.
I add client charset = ISO-8859-7 in freetds.conf and everything seems 
to work fine.
I'm not sure if this is right, because all pages are in UTF8. But 
adding this set to .conf dont work correct.
Is there someone familiar with freetds to explain me what the fuck is 
this?


Thank you an sorry for my language.
Nikos.


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Re: [CentOS] gem install reel on Centos 7

Thanks John for the info... I did that and now I'm missing a file.
I tried to ask yum what package I need - but It did not know.


Building native extensions.  This could take a while...
ERROR: Failed to build gem native extension.

/opt/rh/rh-ruby22/root/usr/bin/ruby -r
./siteconf20190805-94063-1gebs0u.rb extconf.rb
mkmf.rb can't find header files for ruby at
/opt/rh/rh-ruby22/root/usr/share/include/ruby.h

extconf failed, exit code 1

Gem files will remain installed in
/opt/rh/rh-ruby22/root/usr/local/share/gems/gems/nio4r-1.1.1 for inspection.
Results logged to
/opt/rh/rh-ruby22/root/usr/local/lib64/gems/ruby/nio4r-1.1.1/gem_make.out


yum provides /opt/rh/rh-ruby22/root/usr/share/include/ruby.h
Loaded plugins: fastestmirror, langpacks, nvidia
Loading mirror speeds from cached hostfile
 * base: mirror.tzulo.com
 * centos-sclo-rh: mirror.team-cymru.com
 * centos-sclo-sclo: mirror.fileplanet.com
 * elrepo: ord.mirror.rackspace.com
 * epel: ord.mirror.rackspace.com
 * extras: mirror.nodesdirect.com
 * updates: mirrors.liquidweb.com
centos-sclo-rh/x86_64/filelists_db


|  12 MB  00:00:01
elrepo/filelists_db


   |  34 kB  00:00:00
epel/x86_64/filelists_db


|  12 MB  00:00:00
google-chrome/filelists


   | 1.7 kB  00:00:00
updates/7/x86_64/filelists_db


   | 5.2 MB  00:00:00
No matches found

Thanks, What is next ?

Jerry

>
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[CentOS] Peculiar process name in /proc

2019-08-05 Thread John Horne

Hello,

I was looking at a process through the '/proc' file system, and came across a
process name which seemed to contain a hex value:

lrwxrwxrwx. 1 xymon xymon 0 Aug  2 14:07 /proc/58032/exe ->
/usr/sbin/xymond;5d44410e (deleted)

I am aware of what the 'deleted' part means, but have no idea what the
';5d44410e' part means. Is this some sort of thread reference?
The file '/usr/sbin/xymond' does exist and is running as a daemon.

Anyone know what the ';5d44410e' is referring to? I have tried Googling about
this, but found no mention of it.


Thanks,

John.

--
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University of Plymouth | Drake Circus | Plymouth | Devon | PL4 8AA | UK

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Re: [CentOS] browsers slowing Centos 7 installation to a crawl

2019-08-05 Thread Jonathan Billings



> On Aug 5, 2019, at 4:12 AM, Peter  wrote:
> 
> On 5/08/19 10:42 AM, Michael Hennebry wrote:
>> Mem:2020144 1454904   76140  204764  489100  
>> 135004
>> Swap:   4883724  978480 3905244
> 
> free -h is generally more readable, but...
> 
> It's RAM.  You basically have a total of 2G ram on the system, you have less 
> than 500M available and are into swap by nearly 1G, so you're swapping 
> heavily.  2G is enough for a minimal install but browsers such as firefox and 
> chrome can easily use a lot of memory fast and trying to run one on a 2G 
> system while doing an install at the same time will get you swapping and slow 
> the system to a crawl.

Agreed, 2G of RAM for graphical logins and web browsers is not nearly enough.  
I was using 4G on a system running C7 and it was unusable, I can’t imagine 2G.

--
Jonathan Billings 


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Re: [CentOS] how to use an Adaptec RAID 51645

2019-08-05 Thread Alexander Dalloz


Am 2019-08-05 12:30, schrieb Alexander Dalloz:

Am 2019-08-05 12:24, schrieb Ralf Prengel:

Hallo,
has anyone a hint how to use an Adaptec RAID 51645 under Centos 7?

A volume is created using the controller interface but isn't active
under centos.

Thanks for hintsts
Ralf


That's a pretty old RAID controller. Kernel module support for such
old cards have been dropped by RHEL. Check the ELrepo for a matching
package.

https://elrepo.org/tiki/kmod-aacraid

should be a fit.

Alexander


It would be helpful to check the PCI IDs of that card using "lspci -n" 
or "lspci -nn". I just saw the current EL7 kernel provides


# ls -Al 
/lib/modules/3.10.0-957.27.2.el7.x86_64/kernel/drivers/scsi/aacraid/

total 56
-rw-r--r--. 1 root root 56884 Jul 29 20:07 aacraid.ko.xz

and "modinfo aacraid" shows a long list of supported devices.

According to 
https://adaptec.com/de-de/speed/raid/aac/linux/aacraid_linux_rpms_v1_1_7-29100_tgz.php 
the module should be a fit for the Adapted RAID 51645.


Alexander

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Re: [CentOS] how to use an Adaptec RAID 51645

2019-08-05 Thread Alexander Dalloz


Am 2019-08-05 12:24, schrieb Ralf Prengel:

Hallo,
has anyone a hint how to use an Adaptec RAID 51645 under Centos 7?

A volume is created using the controller interface but isn't active
under centos.

Thanks for hintsts
Ralf


That's a pretty old RAID controller. Kernel module support for such old 
cards have been dropped by RHEL. Check the ELrepo for a matching 
package.


https://elrepo.org/tiki/kmod-aacraid

should be a fit.

Alexander

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[CentOS] how to use an Adaptec RAID 51645

2019-08-05 Thread Ralf Prengel


Hallo,
has anyone a hint how to use an Adaptec RAID 51645 under Centos 7?

A volume is created using the controller interface but isn't active  
under centos.


Thanks for hintsts
Ralf

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Re: [CentOS] [OT] odd network question




On 05/08/2019 09:18, Pete Biggs wrote:

I've found the default 10min bans hardly bother some attackers.
So I've added the "recidive" feature of fail2ban.  After the
second 10min ban, the attacker is blocked for 1 week.


Oh definitely. My systems are set to "3 bans and you're out" - a
recidive ban is permanent after three other bans.  I have large parts
of some subnets in my ban list as attackers just move from one host to
another as they get banned.

P.

I worked for a company some time back that had an association with a 
South African company who wanted to host some infrastructure in our data 
centre, the network admin there wanted a specific configuration for 
outbound source NAT from a certain host that would scroll through a list 
of source NAT IP addresses (think a whole /24) for every connection 
attempt, pretty sure it was for sending unsolicited emails, in any case 
the association with that company didn't last and I took redundancy 
after less than a year there.

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Re: [CentOS] [OT] odd network question

2019-08-05 Thread Pete Biggs



> 
> I've found the default 10min bans hardly bother some attackers.
> So I've added the "recidive" feature of fail2ban.  After the
> second 10min ban, the attacker is blocked for 1 week.
> 

Oh definitely. My systems are set to "3 bans and you're out" - a
recidive ban is permanent after three other bans.  I have large parts
of some subnets in my ban list as attackers just move from one host to
another as they get banned.

P.


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Re: [CentOS] browsers slowing Centos 7 installation to a crawl

2019-08-05 Thread Peter


On 5/08/19 10:42 AM, Michael Hennebry wrote:
Mem:    2020144 1454904   76140  204764  489100  
135004

Swap:   4883724  978480 3905244


free -h is generally more readable, but...

It's RAM.  You basically have a total of 2G ram on the system, you have 
less than 500M available and are into swap by nearly 1G, so you're 
swapping heavily.  2G is enough for a minimal install but browsers such 
as firefox and chrome can easily use a lot of memory fast and trying to 
run one on a 2G system while doing an install at the same time will get 
you swapping and slow the system to a crawl.



Peter
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Re: [CentOS] [OT] odd network question