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

[John Pierce]

On Tue, Dec 8, 2020 at 11:02 AM Phelps, Matthew 
wrote:

> Please sign this petition if you don't want the CentOS Board to implement
> this decision:
>
>
> https://www.change.org/p/centos-governing-board-do-not-destroy-centos-by-using-it-as-a-rhel-upstream
>
> Or... don't if you are happy with the change.
>
>
>
CentOS is wholly owned by Red Hat.   What they say goes.


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Re: [CentOS] unsubscribe

[John Pierce]

On Tue, Dec 8, 2020 at 9:12 AM Daniel Worden  wrote:

> Could you please unsubscribe this email address. I was not aware of the
> volume of messages this would create and I would like to resubscire using a
> different email address.
>
> Thank you,
> Daniel Worden
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see that link right there?  ^^

self service!!

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Re: [CentOS] Thanks a lot for 8.3 Update

[John Pierce]

very odd, DNF/YUM should *never* downgrade a package.its possible the
mirror it chose to use was lagging on replication and didn' thave the 8.3
latest packages yet (this is a regular issue with the centos mirrors)., but
really it should have errored rather than downgrading.

On Mon, Dec 7, 2020 at 12:51 AM Thomas Stephen Lee 
wrote:

> Hi,
>
> Thanks a lot for the 8.3 update.
> I would like to point out one thing I faced.
> I downloaded the iso from one mirror.
> After installing, I installed a package (rsync).
> Then some packages, including dnf, got downgraded to 8.2.
> Just a test server, not production.
>
> Thanks.
>
> ---
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Re: [CentOS] ntpdate past CentOS 7

[John Pierce]

On Wed, Dec 2, 2020 at 11:17 AM Jerry Geis  wrote:

> ...
> ntpdate was "nice" in that I could just run once a day as "ntpdate name"


the problem with that sort of time sync is that if your systems clock is
running fast, then those once a day time syncs cause the clock to be set
BACK a few seconds or whatever (in bad cases a few minutes).

I have always run ONE primary ntp server on my internal network, given it
firewall access to the ntp ports, then had all my other systems ntp sync
off that one server.This only requires a single port OUTBOUND
connection from that one server.   I generally avoid the 'pool' servers,
and instead manually  chose a set of regional stratum I or II NTP servers
that are listed as being offered to the public.




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Re: [CentOS] Physical position of swap partition on the disk

[John Pierce]

On Tue, Dec 1, 2020, 2:53 AM Roberto Ragusa  wrote:

>
> Finally, swap throughput really matters when hibernating to disk.
>
> 



And that's really the only time it should matter on a modern system,. I
rarely see /any/ swap in use for normal server or workstation operations
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Re: [CentOS] Replacing SW RAID-1 with SSD RAID-1

[John Pierce]

zpool create newpool mirror sdb sdc mirror sdd sde mirror sdf sdg mirror
sdh sdi spare sdj sdk
zfs create -o mountpoint=/var/lib/pgsql-11 newpool/postgres11


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

[John Pierce]

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] Intel RST RAID 1, partition tables and UUIDs

[John Pierce]

the main advantage I know of for bios fake-raid is that the bios can boot
off either of the two mirrored boot devices.usually if the sata0 device
has failed, the BIOS isn't smart enough to boot from sata1

the only other reason is if you're running MS Windows desktop which can't
do mirroring on its own

On Mon, Nov 16, 2020 at 10:23 AM Jonathan Billings 
wrote:

> On Sun, Nov 15, 2020 at 07:49:09PM -0500, H wrote:
> >
> > I have been having some problems with hardware RAID 1 on the
> > motherboard that I am running CentOS 7 on. After a BIOS upgrade of
> > the system, I lost the RAID 1 setup and was no longer able to boot
> > the system.
>
> The Intel RST RAID (aka Intel Matrix RAID) is also known as a
> fakeraid.  It isn't a hardware RAID, but instead a software RAID that
> has a fancy BIOS interface.  I believe that the mdadm tool can examine
> the RAID settings, and you can look at /proc/mdstat to see its status,
> although from what I remember from previous posts, it's better to just
> let the BIOS think it's a JBOD and use the linux software RAID tools
> directly.
>
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Re: [CentOS] (C8) root on mdraid

[John Pierce]

On Mon, Nov 16, 2020, 2:29 AM Tony Mountifield  wrote:

>
> I thought it was much more usual to partition both disks to give sda1,2,3
> and sdb1,2,3, and then create /dev/md0 from sda1/sdb1, /dev/md1 from
> sda2/sdb3,
> and so on.
>

What I always did was to mdraid a single full disk partition then use lvm
for any file systems.Boot disks did need a separate /boot partition.

>
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Re: [CentOS] mdadm raid-check

[John Pierce]

FWIW, on a 4 x 8TB ZFS RaidZ1, I run a ZFS scrub every night at 2:30am.
 if I had more disks in a raidz2 (equiv to raid6) then I might do it weekly
rather than daily, but since a raidz1 is only singly redundant, I figure
daily scrubs increases the chance I'll catch a failing  drive sooner than
than later
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Re: [CentOS] ssacli start rebuild?

[John Pierce]

On Sat, Nov 14, 2020 at 6:32 PM hw  wrote:

>
> I don't like the idea of flashing one.  I don't have the firmware and I
> don't
> know if they can be flashed with Linux.  Aren't there any good --- and cost
> efficient --- ones that do JBOD by default, preferably including 16-port
> cards
> with mini-SAS connectors?
>
>
the firmware is freely downloadable from  lsi/broadcom, and linux has
sas2flash or sas3flash (for 2x08/3008 respectively) command line tools to
do the flashing.

pretty much standard procedure for the ZFS crowd to flash those...  the
2x08 cards often come with "IR" firmware that does limited raid, and its
preferable to flash them with the IT firmware that puts them in plain HBA
mode, stands for Initiator-Target.


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Re: [CentOS] ssacli start rebuild?

[John Pierce]

On Sat, Nov 14, 2020, 4:57 AM hw  wrote:

> On Wed, 2020-11-11 at 16:38 -0700, Warren Young wrote:
>
> > > And where
> > > do you get cost-efficient cards that can do JBOD?
> >
> > $69, 8 SATA/SAS ports: https://www.newegg.com/p/0ZK-08UH-0GWZ1
>
> That says it's for HP.  So will you still get firmware updates once
> the warranty is expired?  Does it exclusively work with HP hardware?
>
> And are these good?
>

That specific card is a bad choice, it's the very obsolete SAS1068E chip,
which was SAS 1.0, with max 2gb per disk.

Cards based on the SAS 2008, 2308, and 3008 chips are a much better choice.

Any oem card with these chips can be flashed with generic LSI/Broadcom IT
firmware.
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Re: [CentOS] ssacli start rebuild?

[John Pierce]

On Wed, Nov 11, 2020 at 5:47 PM Valeri Galtsev 
wrote:

> I’m sure you can reflash LSI card to make it SATA or SAS HBA, or MegaRAD
> hardware RAID adapter. Is far as I recollect it is the same electronics
> board. I reflashed a couple of HBAs to make them MegaRAID boards.
>

you can reflash SOME megaraid cards to put them in IT 'hba' mode, but not
others.


>
> One thing though bothers me about LSI, now after last it was bought by
> Intel its future faith worries me. Intel pushed 3ware which it acquired in
> the same package with LSI already into oblivion…
>

Its Avago, formerly Aligent, and before that HP, which bought LSI, 3Ware,
and then Broadcom, and renamed itself Broadcom.


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Re: [CentOS] ssacli start rebuild?

[John Pierce]

in large raids, I label my disks with the last 4 or 6 digits of the drive
serial number (or for SAS disks, the WWN).this is visible via smartctl,
and I record it with the zpool documentation I keep on each server
(typically a text file on a cloud drive). zpools don't actually care
WHAT slot a given pool member is in, you can shut the box down, shuffle all
the disks, boot back up and find them all and put them back in the pool.

the physical error reports that proceed a drive failure should list the
drive identification beyond just the /dev/sdX kind of thing, which is
subject to change if you add more SAS devices.

I once researched what it would take to implement the drive failure lights
on the typical brand name server/storage chassis, there's a command for
manipulating SES devices such as those lights, the catch is figuring out
the mapping between the drives and lights, its not always evident, so would
require trial and error.



On Wed, Nov 11, 2020 at 5:37 PM Valeri Galtsev 
wrote:

>
>
> > On Nov 11, 2020, at 6:00 PM, John Pierce  wrote:
> >
> > On Wed, Nov 11, 2020 at 3:38 PM Warren Young  wrote:
> >
> >> On Nov 11, 2020, at 2:01 PM, hw  wrote:
> >>>
> >>> I have yet to see software RAID that doesn't kill the performance.
> >>
> >> When was the last time you tried it?
> >>
> >> Why would you expect that a modern 8-core Intel CPU would impede I/O in
> >> any measureable way as compared to the outdated single-core 32-bit RISC
> CPU
> >> typically found on hardware RAID cards?  These are the same CPUs, mind,
> >> that regularly crunch through TLS 1.3 on line-rate fiber Ethernet
> links, a
> >> much tougher task than mediating spinning disk I/O.
> >
> >
> > the only 'advantage' hardware raid has is write-back caching.
>
> Just for my information: how do you map failed software RAID drive to
> physical port of, say, SAS-attached enclosure. I’d love to hot replace
> failed drives in software RAIDs, have over hundred physical drives attached
> to a machine. Do not criticize, this is box installed by someone else, I
> have “inherited” it.To replace I have to query drive serial number, power
> off the machine and pulling drives one at a time read the labels...
>
> With hardware RAID that is not an issue, I always know which physical port
> failed drive is in. And I can tell controller to “indicate” specific drive
> (it blinks respective port LED). Always hot replacing drives in hardware
> RAIDs, no one ever knows it has been done. And I’d love to deal same way
> with drives in software RAIDs.
>
> Thanks for advises in advance. And my apologies for “stealing the thread"
>
> Valeri
>
> > with ZFS you can get much the same performance boost out of a small fast
> > SSD used as a ZIL / SLOG.
> >
> > --
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Re: [CentOS] ssacli start rebuild?

[John Pierce]

On Wed, Nov 11, 2020 at 3:38 PM Warren Young  wrote:

> On Nov 11, 2020, at 2:01 PM, hw  wrote:
> >
> > I have yet to see software RAID that doesn't kill the performance.
>
> When was the last time you tried it?
>
> Why would you expect that a modern 8-core Intel CPU would impede I/O in
> any measureable way as compared to the outdated single-core 32-bit RISC CPU
> typically found on hardware RAID cards?  These are the same CPUs, mind,
> that regularly crunch through TLS 1.3 on line-rate fiber Ethernet links, a
> much tougher task than mediating spinning disk I/O.


the only 'advantage' hardware raid has is write-back caching.

with ZFS you can get much the same performance boost out of a small fast
SSD used as a ZIL / SLOG.

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Re: [CentOS] USB External video

[John Pierce]

they seem to only have binary drivers for Ubuntu 14+, with no source links
on the vendor's website,  and I looked up the chip it uses, DisplayLink
DL-5500, that too says it only supports Ubuntu, and had no source download
links either, further, the Ubuntu driver consists of 3 separate giant .run
files for 14.04, 17.10, 16+18+20, so even you are running Ubuntu, you're
dependent on the vendor supplying drivers for future releases in a timely
manner.



On Fri, Nov 6, 2020 at 12:40 PM Jerry Geis  wrote:

> Hi All  - Has anyone tried using a USB 4K adapter ? Something like
> Startech USB32HD4K?
>
> Are these devices on option for linux ? Thanks
>
> Jerry
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Re: [CentOS] BIOS RAID0 and differences between disks

[John Pierce]

is it RAID 0 (striped) or raid1 (mirrored) ??

if you wrote on half of a raid0 stripe set, you basically trashed it.
blocks are striped across both drives, so like 16k on the first disk, then
16k on the 2nd then 16k back on the first, repeat (replace 16k with
whatever your raid stripe size is).

if its a raid 1 mirror, then either disk by itself has the complete file
system on it, so you should be able to remirror the changed disk onto the
other drive.   you MUST do that re-mirror because your two disks are no
longer identical, and reads will alternate between them, so some reads will
get new data and others will get old data, which will be highly chaotic.



On Wed, Nov 4, 2020 at 6:18 PM H  wrote:

> My computer running CentOS 7 is configured to use BIOS RAID0 and has two
> identical SSDs which are also encrypted. I had a crash the other day and
> due to a bug in the operating system update, I am unable to boot the system
> in RAID mode since dracut does not recognize the disks in grub. After
> modifying the grub command line I am able to boot the system from one of
> the harddisks after entering the LUKS password, seemingly without any
> problems but am obviously not running in RAID0 mode. When I booted in
> single-disk mode I am sure there were some new files created on the single
> SSD the system sees but I fairly quickly shut it down until this can be
> fixed.
>
>
>
> My question is: once the operating system fix has been released and I can
> once again boot in BIOS RAID0 mode and decrypting both SSDs (same password
> entered only once of course), how will the BIOS RAID0 react? How will it
> handle new files on one disk, altered timestamps etc.?
>
>
> Thanks.
>
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Re: [CentOS] Run as root on reboot

[John Pierce]

On Wed, Oct 28, 2020 at 8:53 PM david  wrote:

>
> By "initial setup", I meant during the initial install of the
> operating system, starting from "net-install".  Maybe one user is
> defined.  The reboot command is issued from a script that was
> initiated by hand.
>

so you want this script run /before/ the manually issued reboot ?   why not
just run the script and have IT initiate the reboot when its done ?


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Re: [CentOS] NFS Client to Server User Mapping / how to configure for user-IDs

[John Pierce]

All nodes participating in NFSv3 should have the same UID and GID for the
same usernames.

With NFSv4, the users/groups are identified by name rather than UID/GID



On Thu, Oct 15, 2020 at 10:27 PM Ralf Prengel 
wrote:

>
> Hallo,
> we ve a central Cent7 system working as NFS server.
> Everything works fine with simple configurations like one client is
> mapping  a share and several clients are mapping a share to edit one
> or more files wotling as root
>
> The problem:
> fpr a projekt we ve 4 elk-nodes sharing one share on this server to
> use the same files.
> This doesn t work.
> My guess is that the  reason is that elk is using an own user.
> What ist the best way to solve the problem. We have no central
> user-managemnt for linux-logins.
>
>
> Thanks
> Ralf
>
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Re: [CentOS] External harddisk

[John Pierce]

On Tue, Sep 29, 2020, 8:33 AM H  wrote:

> I have an old external harddisk, Toshiba 320 Gb, with a USB connector that
> I wanted to check for contents. It did not start up when connected and I
> could not hear the motor spinning. After leaving it in the freezer
> overnight the motor spins but it is not recognized by my computer. I
> disassembled it and could see that the head assembly rests outside the disk
> but when it is powered on, the head first moves to the center of the disk,
> then to the periphery and finally back to the resting position. This
> happens every few seconds and leaving it connected overnight changed
> nothing.
>

That repeated seeking suggests it's not passing its self test, and is
constantly retrying.   It's probably searching for servo data on the disks,
and not finding it.

>
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Re: [CentOS] Logitech C922 webcam

[John Pierce]

do you have another computer, perhaps a Windows system, you can plug this
camera into to see if it works at all?

On Tue, Sep 29, 2020 at 7:22 PM H  wrote:

> On 09/29/2020 10:01 PM, Bruce Ferrell wrote:
> > On 9/29/20 6:50 PM, H wrote:
> >> On 09/29/2020 09:09 PM, John Pierce wrote:
> >>> do other USB 3 (XHCI) devices work on this system ?
> >>>
> >>> On Tue, Sep 29, 2020 at 5:27 PM H  wrote:
> >>>
> >>>> On 09/29/2020 02:11 PM, Bruce Ferrell wrote:
> >>>>> Try
> >>>>>
> >>>>> lsusb -v
> >>>>>
> >>>>> and
> >>>>>
> >>>>> sudo dmesg
> >>>>>
> >>>>> ... Be aware, systemd deals with udev and it may be malfunctioning
> >>>>>
> >>>>>
> >>>>> On 9/29/2020 10:30 AM, H wrote:
> >>>>>> Just installed the above USB webcam but it is not recognized by
> dmesg |
> >>>> grep usb, nor does Zoom recognize it. I was under the understanding it
> >>>> should not require a driver, or?
> >>>>>> I am running CentOS 7.
> >>>>>>
> >>>>>> Thanks.
> >>>>>>
> >>>>>> ___
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> >>>>> ___
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> >>>>> https://lists.centos.org/mailman/listinfo/centos
> >>>> I'll bite, systemd and its interaction with udev is beyond my
> paygrade.
> >>>> How do I investigate this?
> >>>>
> >>>> ___
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> >>>>
> >> Not sure I have any. I tried two different USB 3.0 connectors with the
> same result.
> >>
> >> Is there any way I can test this?
> >
> > I just checked my C922 it's plugged into a USB2 port and works fine
> >
> > Try ANY usb device in your ports and see if it shows up in lsusb
> >
> > You may have a bad port
> >
> >
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> I have tried three different ports, two USB-3 and one USB-2 port...
>
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Re: [CentOS] Logitech C922 webcam

[John Pierce]

try the camera in a USB 2 port, it should work just fine at usb 2 speeds.
  most systems, the USB 3 ports hve a 'blue' tongue, while the 2 ports are
black or another color.

On Tue, Sep 29, 2020 at 6:50 PM H  wrote:

> On 09/29/2020 09:09 PM, John Pierce wrote:
> > do other USB 3 (XHCI) devices work on this system ?
> >
> > On Tue, Sep 29, 2020 at 5:27 PM H  wrote:
> >
> >> On 09/29/2020 02:11 PM, Bruce Ferrell wrote:
> >>> Try
> >>>
> >>> lsusb -v
> >>>
> >>> and
> >>>
> >>> sudo dmesg
> >>>
> >>> ... Be aware, systemd deals with udev and it may be malfunctioning
> >>>
> >>>
> >>> On 9/29/2020 10:30 AM, H wrote:
> >>>> Just installed the above USB webcam but it is not recognized by dmesg
> |
> >> grep usb, nor does Zoom recognize it. I was under the understanding it
> >> should not require a driver, or?
> >>>> I am running CentOS 7.
> >>>>
> >>>> Thanks.
> >>>>
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> >>> ___
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> >>> CentOS@centos.org
> >>> https://lists.centos.org/mailman/listinfo/centos
> >> I'll bite, systemd and its interaction with udev is beyond my paygrade.
> >> How do I investigate this?
> >>
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> >
> Not sure I have any. I tried two different USB 3.0 connectors with the
> same result.
>
> Is there any way I can test this?
>
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Re: [CentOS] Logitech C922 webcam

[John Pierce]

do other USB 3 (XHCI) devices work on this system ?

On Tue, Sep 29, 2020 at 5:27 PM H  wrote:

> On 09/29/2020 02:11 PM, Bruce Ferrell wrote:
> > Try
> >
> > lsusb -v
> >
> > and
> >
> > sudo dmesg
> >
> > ... Be aware, systemd deals with udev and it may be malfunctioning
> >
> >
> > On 9/29/2020 10:30 AM, H wrote:
> >> Just installed the above USB webcam but it is not recognized by dmesg |
> grep usb, nor does Zoom recognize it. I was under the understanding it
> should not require a driver, or?
> >>
> >> I am running CentOS 7.
> >>
> >> Thanks.
> >>
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> > https://lists.centos.org/mailman/listinfo/centos
>
> I'll bite, systemd and its interaction with udev is beyond my paygrade.
> How do I investigate this?
>
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Re: [CentOS] Logitech C922 webcam

[John Pierce]

On Tue, Sep 29, 2020 at 10:30 AM H  wrote:

> Just installed the above USB webcam but it is not recognized by dmesg |
> grep usb, nor does Zoom recognize it. I was under the understanding it
> should not require a driver, or?
>
> I am running CentOS 7.
>
>
absolutely nothing at the end of dmesg when you plug it in ?



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Re: [CentOS] Question regarding cent OS 7.8.2003 compatibility with large SAS disks

[John Pierce]

On Thu, Sep 24, 2020 at 9:26 PM Amey Abhyankar  wrote:

> Hello,
>
> I have a blade server with SAS HDD's of 12TB in total.
> 3 HDD's of 4TB each.
>
> Is it possible to install Cent OS  7.8.2003 on 12TB disk space?
> I will be installing Cent OS on the bare metal HW.
>
>
the SAS hardware has to be SAS2 or newer, as SAS1 had a maximum physical
drive size of around 2tb

and the boot volume has to be GPT as MBR has a 2TB limit.

otherwise, sky is the limit, however, what the other guys say, I do NOT put
my OS on my data raids,  its usually on its own mirror of two small drives.

I also tend to avoid "hardware" raid cards, and prefer HBA cards that
present the drives as plain SAS devices, then use the OS's native storage
management for raid (mdraid + LVM for Linux, ZFS on FreeBSD, etc)..   I
generally spec raid 10 for performance data, and raid 6 or 60 for bulk
data.   raid5 is frowned on these days, disks are so big, and rebuild times
are long enough that the risk of a double failure is fairly high.
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Re: [CentOS] CentOS 8 LSI SAS2004 Driver

[John Pierce]

On Sun, Sep 20, 2020 at 1:03 AM John Pierce  wrote:

>
>
> On Sun, Sep 20, 2020 at 12:24 AM John Pierce  wrote:
>
>>
>> strikes me, MPT2 support should find its home in the CentOSPlus kernel
>> for 8.
>>
>
>
> ooof.  IS there a CentOSplus 8 ??
> https://wiki.centos.org/AdditionalResources/Repositories/CentOSPlus
> doesn't say anything about it.
>

ok, yes there is.  found by changing 7 to 8 in the URL ...
http://mirror.centos.org/centos/8/centosplus/

that should be linked here,
https://wiki.centos.org/AdditionalResources/Repositories/CentOSPlus



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Re: [CentOS] CentOS 8 LSI SAS2004 Driver

[John Pierce]

On Sun, Sep 20, 2020 at 12:24 AM John Pierce  wrote:

>
> strikes me, MPT2 support should find its home in the CentOSPlus kernel for
> 8.
>


ooof.  IS there a CentOSplus 8 ??
https://wiki.centos.org/AdditionalResources/Repositories/CentOSPlus doesn't
say anything about it.

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Re: [CentOS] CentOS 8 LSI SAS2004 Driver

[John Pierce]

On Sat, Sep 19, 2020 at 8:17 PM Akemi Yagi  wrote:

> On Sat, Sep 19, 2020 at 8:04 PM William Markuske 
> wrote:
> >
> > Hello,
> >
> > I ... have come to find out that RedHat deprecated support for a number
> of HBAs for 8 including all running the SAS2004 chip.
> >
> > Does anyone know if there is a driver available for this chip...
>
> It is ELRepo, not EPEL. :)
>
>
> http://elrepoproject.blogspot.com/2019/08/rhel-80-and-support-for-removed-adapters.html
>
>
strikes me, MPT2 support should find its home in the CentOSPlus kernel for
8.




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Re: [CentOS] CentOS 8 LSI SAS2004 Driver

[John Pierce]

that chip should use the MPT2SAS driver, same as the more common SAS2008.
 a complication for both of those is they can be flashed to be either IT
(initiator-terminator mode, a pure SAS HBA), or IR (integrated raid, a
rather weak implementation of hardware raid).AFAIK, the MPT2 driver is
for IT mode, so if the board identifies itself as IR, I believe it uses a
different 'megaraid' driver.

On Sat, Sep 19, 2020 at 8:04 PM William Markuske 
wrote:

> Hello,
>
> I've recently been given domain over a number of supermicro storage
> servers using Broadcom / LSI SAS2004 PCI-Express Fusion-MPT SAS-2
> [Spitfire] (rev 03) to run a bunch of SSDs. I was attempting to do fresh
> installs of CentOS 8 and have come to find out that RedHat deprecated
> support for a number of HBAs for 8 including all running the SAS2004 chip.
>
> Does anyone know if there is a driver available for this chip from a
> third party repo? My google searches have led me to believe that EPEL 8
> has a kmod-mpt3sas package but it does not seem to exist though multiple
> blogs have stated otherwise. If anyone knows if there is a solution for
> CentOS 8 that would be great or if I have to roll back to CentOS 7 for
> card support.
>
> Thanks,
>
> William
>
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Re: [CentOS] erasing a disk

[John Pierce]

I've never run into a system yet where using dd to write zeros on the first
few megabytes didn't completely wipe the disk as far as the OS and existing
file systems are concerned..

dd if=/dev/zero of=/dev/sde bs=65536 count=1024
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Re: [CentOS] A Request to Add module to CentOS Linux (3.10.0-1127.18.2.el7.x86_64) 7 (Core)

[John Pierce]

On Thu, Sep 10, 2020, 11:08 PM Dedoep  wrote:

> Hello,
>
> Is it possible to add the mac802154_hwsim module to CentOS Linux
> (3.10.0-1127.18.2.el7.x86_64) 7 (Core), so that its part of the OS?


If that module is not part of red hat Enterprise 7 then it will never be
part of CentOS.

>

I googled the module name, it appears to be something new from kernel 5.x
?   Backporting that to 3.10 is likely a massive job.

>
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Re: [CentOS] changing subscribed email address?

[John Pierce]

On Wed, Sep 2, 2020, 12:21 PM Jake Shipton 
wrote:

>
>
> Attached to the footer of every message on the list features the
> following link:
>
> https://lists.centos.org/mailman/listinfo/centos
>
> You can use this to manage your subscription (Scroll down the page).
>


there's no option on that page to change the address which the original
poster was asking about. As far as I know the only method is to unsubscribe
the old address and subscribe the new address.

>
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Re: [CentOS] How to Migrate Wordpress Website from 32-bit CentOS Linux 6.3 to 64-bit CentOS Linux 8.2 (2004)

[John Pierce]

On Mon, Aug 31, 2020, 6:31 AM Turritopsis Dohrnii Teo En Ming <
ceo-teo-en-m...@outlook.com> wrote:

> Subject: How to Migrate Wordpress Website from 32-bit CentOS Linux 6.3 to
> 64-bit CentOS Linux 8.2 (2004)
>
> ...
>
> Host operating system is Windows Server 2008 R2 Standard
>
> Host Processor: Intel Xeon CPU E5620 @ 2.40 GHz
>
> Host Memory: 24 GB RAM
>
> Old Oracle VirtualBox version is 4.1.18
>

obsolete proprietary OS, obsolete hardware, obsolete VirtualBox   Even if
you didn't get all kind of things wrong in your instructions (see previous
replies), its OFF TOPIC on this list.

your Wordpress upgrade could have been simplified to...

1)  install and secure new OS on new system or VM
2)  install and configure mysql or mariadb from OS distribution
3) mysql dump old database, restore on new server
4) tar up old wordpress and restore on new server
5) configure old wordpress to use new database, start it up
6) run sttandard wordpress upgrade.

done.

but this all is standard Wordpress administration, completely off topic for
CentOS lists.
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Re: [CentOS] Replacement for KMail V1

[John Pierce]

On Mon, Aug 17, 2020, 2:16 AM Gary Stainburn 
wrote:

>
> I am currently limping along using Thunderbird but I find the lack of
> useful keystroke functions (such as next unread message, next folder
> with an unread message) annoying. Having to move my hand from keyboard
> to mouse is more exercise than I'm used to.
>

I ran Thunderbird on Windows for years, I believe control N is next new
message, and will skip to a new folder too.
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Re: [CentOS] Teo En Ming's Learning Achievements on 14 August 2020 Friday

[John Pierce]

On Fri, Aug 14, 2020 at 4:24 PM Turritopsis Dohrnii Teo En Ming <
c...@teo-en-ming.com> wrote:

> Subject: Teo En Ming's Learning Achievements on 14 August 2020 Friday
>
> [1] Activate Cisco AnyConnect SSL VPN License on Cisco ASA 5506-X
> Firewall
>
> Today I discovered that the base license for Cisco ASA 5506-X Firewall
> only allows 
>

this has NOTHING to do with CentOS, and is way off topic here.

I suggest you post things like this on a personal blog, or facebook, or
something ... and don't bother to announce it here, as we really don't care.




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Re: [CentOS] Docker swarm service misconfigured in FirewallD / CentOS 7

[John Pierce]

Who packaged this docker swarm thing?


On Thu, Aug 13, 2020, 1:27 AM Nicolas Kovacs  wrote:

> Hi,
>
> I'm currently fiddling with Docker Swarm on three sandbox servers running
> CentOS 7.
>
> Unfortunately I couldn't get even the most basic configuration running.
> After
> some experimenting and investigating, it turns out there's a problem with
> FirewallD.
>
> Here's what I did first on every single node.
>
> # firewall-cmd --permanent --add-service=docker-swarm
> # firewall-cmd --reload
>
> I launched a simple web service like this:
>
> # docker service create --name web -p 80:80 nginx
>
> My three nodes appear correctly with 'docker node ls'.
>
> From here, I should be able to open the Nginx default web page in a web
> browser
> using any node's hostname.
>
> But nothing happens. No page is loaded.
>
> On a whim, I turned off FirewallD, and suddenly everything worked as
> expected.
>
> Now here's the list of ports that have to be open on every single node for
> Docker Swarm to work:
>
>   * 2376/tcp
>   * 2377/tcp
>   * 7946/tcp
>   * 7946/udp
>   * 4789/udp
>
> And here's what docker-swarm.xml looks like under CentOS 7:
>
> # cat /usr/lib/firewalld/services/docker-swarm.xml
> 
> 
>   Docker integrated swarm mode
>   Natively managed cluster of Docker Engines (>=1.12.0),
> where you
> deploy services.
>   
>   
>   
>   
>   
> 
>
> So it looks like TCP port 2376 was forgotten in that service definition.
>
> I opened it up manually on every node:
>
> # firewall-cmd --permanent --add-port=2376/tcp
> # firewall-cmd --reload
>
> And now Docker Swarm works correctly.
>
> Cheers from the sunny South of France,
>
> Niki Kovacs
>
>
> --
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> 7, place de l'église - 30730 Montpezat
> Site : https://www.microlinux.fr
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Re: [CentOS] python problem

[John Pierce]

On Sun, Aug 9, 2020 at 1:40 PM Chuck Campbell  wrote:

> ...
> dnf copr enable abn/throttled
> dnf install -y throttled
>
> but I get this output:
> Error:
>   Problem: conflicting requests
>- nothing provides python3-configparser needed by throttled0.7-1.x86_64
>
> I have no guess what to do about this.


Well, that dependency is being invoked by this third party package,
abn/throtted from the COPR collection of Fedora...  I have no idea what
repos it might be in



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Re: [CentOS] Boot failed on latest CentOS 7 update

[John Pierce]

On Sun, Aug 2, 2020 at 7:14 PM Chris Adams  wrote:

> Once upon a time, Jonathan Billings  said:
> > On Aug 2, 2020, at 14:43, Pete Biggs  wrote:
> > > You don't have to use UEFI secure booting - most machines can fall back
> > > to legacy booting using BIOS settings. If you do that, you won't use
> > > any Microsoft signed code.
> >
> > Back in 2017, Intel said that it was going to deprecate the “Legacy” CSM
> by 2020. They might have changed their schedule but I suspect we’ll start
> seeing hardware without anything but UEFI.
>
> I believe that is still Intel's plan.
>
> However, as happens often, people are confusing UEFI and Secure Boot.
> UEFI is a replacement for the ages-old BIOS - Secure Boot is an
> extension to UEFI to create a "trusted" (for whatever that may mean)
> boot chain to get to the OS.  You can have UEFI without having Secure
> Boot enabled (that's what I do on my systems).
>

Legacy BIOS has its own set of issues, like no GPT support, MBR disks are
max 2TB.



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Re: [CentOS] Boot failed on latest CentOS 7 update

[John Pierce]

On Sun, Aug 2, 2020 at 3:54 PM Gordon Messmer 
wrote:

> On 8/2/20 1:19 PM, John Pierce wrote:
> > One of the things that bugs me about PKI trust chains like this, what
> > happens if the unthinkable happens, and Microsoft's RootCA gets
> compromised
> > and has to be revoked... does that mean every single piece of UEFI
> > hardware  out there needs a BIOS upgrade?
>
>
> Yes.  They'll be vulnerable to malware signed by the old CA until
> they're updated.
>
> That's better than systems without a PKI trust chain, which are
> vulnerable all of the time.


isn't it more that they simply won't work with newer boots that were signed
by the new keys?  and the updated BIOS's won't boot older OS versions that
weren't signed by the new keys?

BIOS updates are often not available for sligthly older hardware, once it
goes out of production most vendors lose all interest.

>
>


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Re: [CentOS] Boot failed on latest CentOS 7 update

[John Pierce]

On Sun, Aug 2, 2020 at 1:01 PM Phil Perry  wrote:

> I believe Microsoft signs the shim which then becomes the trusted
> authority and embeds RH (or CentOS) signing cert, so (I believe) every
> release of the shim needs to be signed by Microsoft. So it's not quite
> as efficient as MS signing a RH/CentOS CA key, but is not far off.
>


One of the things that bugs me about PKI trust chains like this, what
happens if the unthinkable happens, and Microsoft's RootCA gets compromised
and has to be revoked... does that mean every single piece of UEFI
hardware  out there needs a BIOS upgrade?  and don't UEFI bios updates
have to be signed too?



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Re: [CentOS] Boot failed on latest CentOS 7 update

[John Pierce]

On Sun, Aug 2, 2020 at 11:45 AM Phil Perry  wrote:

> On 02/08/2020 16:26, Valeri Galtsev wrote:
> >
> > On the side note: it is Microsoft that signs one of Linux packages now.
> We seem to have made one more step away from “our” computers being _our
> computers_. Am I wrong?
> >
> > Valeri
> >
>
> Microsoft are the Certificate Authority for SecureBoot and most
> SB-enabled hardware (most x86 hardware) comes with a copy of the
> Microsoft key preinstalled allowing binaries that are signed by
> Microsoft to work. In the case of linux, that is the shim which becomes
> the root of trust to load everything else. If you are not happy with
> that you can always become your own certificate authority by generating
> your own keys, install your signing keys in the hardware's firmware (MOK
> list) and sign stuff yourself to use on your own machine(s).
>
> However if you wish to distribute stuff to others and have it work
> seamlessly on hardware outside of your direct control and without the
> need for every user to import your CA SecureBoot signing key into the
> MOK list on every device, you would rely on Microsoft to sign SB related
> content.
>
>
now, does Microsoft have to sign each released module themselves, or will
they issue a CA  cert to an authorized OS creator, like RH, then let RH
sign their own modules?

EG,Microsoft RootCA -> Signed Package
vs,  Microsoft RootCA -> RH Child CA -> Signed Package 





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Re: [CentOS] USB-serial adapter for CentOS 7

[John Pierce]

On Wed, Jul 8, 2020 at 8:46 AM H  wrote:

>
> I believe I mentioned that the UPS has the serial port, the computer thus
> has USB.
>
>
yes, but is it 'basic serial UPS' or is it 'enhanced serial UPS' ?the
former do NOT use the rx/tx data of the serial port at all, they ONLY use
the serial port control  signals, and they probably will NOT work with a
USB port because they require very specific behavior from those signals at
power up and reboot times.

the latter DO use the serial data, and may work with USB serial.


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Re: [CentOS] USB-serial adapter for CentOS 7

[John Pierce]

If it is an older APC UPS, that uses basic serial signaling, it's not
actually a serial port, it's a criss-cross special serial cable that
manages the control lines with DSR DTR CTS and so forth. these are very
fussy cables that have to be exactly the right one or the UPS may just
abruptly shut off.

As far as USB serial cables go, the FTDI ones have always worked well for
me,at least for applications that actually use the serial port for serial
data

On Wed, Jul 8, 2020, 8:14 AM H  wrote:

> I need to connect an older APS UPS unit to a machine running CentOS 7.
> Unfortunately the UPS only has a serial port whereas the computer does not.
> I am aware that there are USB-serial adapters but that the hardware or the
> drivers might fall short of expectations.
>
> Does anyone have positive experience with such an adapter? Or, conversely,
> would recommend avoid a particular adapter?
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Re: [CentOS] [OT] Bacula offsite replication

[John Pierce]

On Thu, Jul 2, 2020, 1:51 AM Alessandro Baggi 
wrote:

> Hi John,
>
> thank you for your answer, I already take in consideration DRBD but I
> need some test before start.
>
> Reading you seems that this solution is not anymore available. What do
> you use for this?
>

That system was surplused 2 years ago when my group was shut down and I
retired.

>
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Re: [CentOS] [OT] Bacula offsite replication

[John Pierce]

I setup drbd to replicate a ~50TB backuppc hive to the DR copy, an
identical box in a different DC on the same campus, with approximately gigE
speeds, and ran this for a year or two.   It worked well enough but
required babysitting from time to time.   Both nodes were mdraid lvm
logical volumes formatted as a single huge xfs on centos.  I never
automated the failover as it never failed, and as a dev/test backup, 8 hour
response seemed adequate

On Thu, Jul 2, 2020, 1:22 AM Alessandro Baggi 
wrote:

> Il 01/07/20 17:13, Leroy Tennison ha scritto:
> > I realize this shouldn't happen, the file is a tgz and isn't being
> modified while being transmitted.  This has happened maybe three times this
> year and unfortunately I've just had to deal with it rather than invest the
> time to do the research.
> >
> >
> > Harriscomputer
> >
> > Leroy Tennison
> > Network Information/Cyber Security Sp
>
> Hi Leroy,
>
> I think that in my case I could not use a tgz archive. I'm speaking
> about full backups that reach 600/700GiB, compressing them and then
> rsync them could take so much time that it will be useless.
>
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Re: [CentOS] fdisk boot partition

[John Pierce]

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.



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Re: [CentOS] Unable to find the used space

[John Pierce]

On Mon, Jun 29, 2020 at 1:23 PM Michael Hennebry <
henne...@web.cs.ndsu.nodak.edu> wrote:

>
> Though rather unlikely, it is possible that none of /*
> are in the same filesystem as / ,
> hence the need for / rather than /* .


as /dev, /proc, and /sys are mounted on nearly every linux system, and
those are places you don't want du poking around, you do need to avoid that.




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Re: [CentOS] CentOS 7 system running out of available memory, then unusable, network interfaces probably involved

[John Pierce]

On Mon, Jun 29, 2020 at 12:47 PM wwp  wrote:

>
> Nothing jumps to my eyes looking at /var/log/messages but this, many
> occurrences:
>   kernel: nf_conntrack: falling back to vmalloc.
>

nf_conntrack is only involved if you are doing some form of NAT routing on
this system and/or fairly complex iptables kind of rules  you mentioned
two different network interfaces, one wired, one wireless, how are you
using these, what sort of routing between the two networks ?



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

[John Pierce]

Re ink jets.   I have one, a Canon Pro wide carriage photo printer, that
uses like 8 colors and makes gorgeous full color prints.Its connected
to a Windows workstation.   Its the first inkjet I've had that can go
months of disuse, then fire up and print a glossy 11x17 or whatever right
the first time.

We use the networked Brother laser for 99%
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Re: [CentOS] HP vs. Brother Printers: Use with Centos/Fedora

[John Pierce]

On Sat, Jun 27, 2020 at 2:44 PM Frank Cox  wrote:

>
> Any Brother printer that I've ever had the misfortune to have to deal with
> either didn't work at all or if could be made to work, it didn't work for
> long.
>
> If it's a Brother, run away as fast as you can.  They're the cheapest
> crappiest thing you can possibly imagine.
>

odd, I've had very good luck with Brother B laser printers.   Supplies
are far cheaper than HP or whatever, my MFC-8810DW sits on my LAN (via
ethernet although it has wifi too) and lets everything in the house print
to it, and it can scan to a SMB file server without needing any special
software, just push a few buttons on the printer, it scans either flatbed
or sheet fed (single or double sided) and a PDF appears on the file share a
few seconds later.Brother supports both LPR and CUPS.


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Re: [CentOS] firewall questions

[John Pierce]

On Sun, Jun 21, 2020 at 12:33 PM Chuck Campbell 
wrote:

> I'm running Centos 7.8.2003, with firewalld.
>
> I was getting huge numbers of ssh attempts per day from a few specific
> ip blocks.
>
> The offenders are 45.0.0.0/24, 49.0.0.0/24, 51.0.0.0/24, 111.0.0.0/24
> and 118.0.0.0/24,
>


so just 45.0.0.0 through 45.0.0.255 and not other 45.x.y blocks ?  ditto
your other networks?sure you didn't mean /8 or another sized subnet on
there?

doing some whois,  the actual 45.0.0.0 block has a netmask of /15, which is
45.0.0.0 through 45.1.255.255, and belongs to Interop, the IT trade show.
45.2.0.0/16 belongs to Frontier Networks in Ontario, CA
45.3.0.0/19 belongs to Start Cable in Ontario
45.3.32.0/19 belongs to someone in Los Vegas.
45.3.64.0/18 belongs to Virginia Polytechnic
45.3.128.0/17 belongs to Charter Cable (formerly Bright House Networks)
45.4.0.0/14 is LANIC, and further diced into a multitude of Latin America
networks.
45.8.0.0/13 is RIPE, and diced into various european networks.
etc etc etc.


anyways, I didn't see your rules explicitly blocking 22/tcp, which is ssh...

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Re: [CentOS] Blog article about the state of CentOS

[John Pierce]

On Sun, Jun 21, 2020 at 2:01 AM Simon Matter via CentOS 
wrote:

> > On 21/06/20 1:23 pm, John Pierce wrote:
> >> but the build process should be the same, no?I can't believe RH
> >> would
> >> use a completely different build process for the release than for the
> >> beta/development stuff.
> >
> > The packages still have to be built as a whole, they need to go through
> > QA testing, isos need to be built and tested.  The only thing that I can
> > think of that Stream benefits this process is to help Red Hat find the
> > odd bug here and there before their final release (after which CentOS
> > still has to do everything listed above).
>
> As I understand it the whole full build and QA and whatever may still be
> done again. The big difference is that the whole work of how to build and
> setting up the build infrastructure has already been done and is known and
> tested. So the complete build is going quite fast and the big delays are a
> thing of the past.
>
> If it's going to be like that it sounds very good.
>
>
exactly, that was my point.I remember 8.0 was very delayed by how much
harder and different the build process was.


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Re: [CentOS] Blog article about the state of CentOS

[John Pierce]

but the build process should be the same, no?I can't believe RH would
use a completely different build process for the release than for the
beta/development stuff.



On Sat, Jun 20, 2020 at 5:36 PM Peter  wrote:

> On 21/06/20 9:15 am, John Pierce wrote:
> > On Sat, Jun 20, 2020 at 4:08 AM Tom Bishop  wrote:
> >
> >> +1 Streams is not for a production workload, if I wanted that I can
> easily
> >> deploy an Arch instance if I want or need a rolling distro (it's not
> Redhat
> >> etc but still). If Redhat wanted CentOS to be released near the same
> time
> >> line they could help make that happen, although that wouldn't be in
> there
> >> best financial interest.
> >
> >
> > think of it this way ... when the rolling beta is done, the final release
> > will be done with no further delay.
>
> No, Stream and the core OS are built form a completely separate set of
> sources.  I highly doubt that we could use binaries built from stream to
> populate the final release.  The whole thing has to be rebuilt for the
> final release regardless of the status of Stream.
>
>
> Peter
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Re: [CentOS] Blog article about the state of CentOS

[John Pierce]

On Sat, Jun 20, 2020 at 4:08 AM Tom Bishop  wrote:

> +1 Streams is not for a production workload, if I wanted that I can easily
> deploy an Arch instance if I want or need a rolling distro (it's not Redhat
> etc but still). If Redhat wanted CentOS to be released near the same time
> line they could help make that happen, although that wouldn't be in there
> best financial interest.


think of it this way ... when the rolling beta is done, the final release
will be done with no further delay.




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Re: [CentOS] Amd es1000

[John Pierce]

On Thu, Jun 18, 2020 at 1:55 PM Valeri Galtsev 
wrote:

>
> Ah, I love your good answer. I remember this from the past:
>
> Why my $20 adaptec RAID card (they were "software" RAID) doesn't work as
> well (if at all) as your $700 3ware or LSI (megaraid) or Areca card?
>
>

actually, I prefer the LSI 'HBA' cards in IT mode, with the raid
functionality completely disabled, and use the host OS's storage
management, ZFS on FreeBSD or mdraid+lvm on Linux.Only place I would
use a 'true' RAID controller would be on a Windows Server as Windows
software raid is awful, ok, and on a VMware ESXi server, as its storage
management is awful, too.   But on that latter, I would MUCH rather use
NAS/SAN storage.   And on the Windows server, I would much rather it be
virtualized.


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Re: [CentOS] Amd es1000

[John Pierce]

On Thu, Jun 18, 2020 at 11:04 AM paride desimone  wrote:

> The throuble is the radeon driver. I've already tried to install the gui,
> but the system hung on start gui.
> The es1000 is a shit gpu.
>
>

those are just intended to provide a minimal VGA for initial installation
and configuration of a server, they were never intended for use as a
workstation.  They are a Rage 6, not really a Radeon, they have very
limited 3D capability, with no shaders.


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Re: [CentOS] firewall help request

[John Pierce]

On Tue, Jun 16, 2020 at 1:26 PM david  wrote:

>
> ...  I'm assuming
> that your advice about LAN represents the internal network because on
> most routers, it is, and WAN is the internet connection.
>
>
>
yeah, LAN == Local Area Network,  WAN == Wide Area Network, generally
meaning the internet.


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Re: [CentOS] firewall help request

[John Pierce]

On Tue, Jun 16, 2020 at 12:26 PM david  wrote:

>
> Examples of what I've tried, and then tested.  None of them stopped
> an outgoing SSH from an internal system.
>
>iptables -I INPUT -p tcp --dport 22 -s 10.0.0.0/24 -j DROP
>iptables -I INPUT -p tcp --dport 22 -s 10.0.0.0/24 -j DROP
>
>
>
which interface is that bound to?   I don't see a -i eth0 or whatever, but
you want that rule on your LAN interface.

note these rules will also prevent any host on 10.0.0.0/24 from ssh'ing to
the gateway machine itself.


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Re: [CentOS] Missing Quote from latest Update

[John Pierce]

On Tue, Jun 16, 2020 at 8:56 AM Natassia S  wrote:

> Received these error message during update 16Jun2020.
>
> Running scriptlet: kmod-kvdo-6.2.1.138-58.el8_1.x86_64
> 750/1181
>
> /etc/sysconfig/network-scripts/ifcfg-eno1: line 21: unexpected EOF while
> looking for matching `"'
>
> /etc/sysconfig/network-scripts/ifcfg-eno1: line 22: syntax error:
> unexpected end of file...
>

um, what does your /etc/sysconfig/network-scripts/ifcfg-eno1 file look like
?

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Re: [CentOS] Centos7 and Vlan

[John Pierce]

Did you setup outbound NAT for both vlans via iptables?

Policy routing to multiple wan interfaces is a bit tricky,.  It's been
years since I did it, what I remember was using ip rules to categorize and
tag the traffic, then alternate named ip route tables to direct the
different tags at different gateways.

On Tue, Jun 16, 2020, 1:57 AM Alfredo De Luca 
wrote:

> Hi all.
> I wonder if you can help me here.
>
> I have centos7 with 1 network interface and on that IFwe have 2 vlan.
> From both vlan we'd like to reach the internet independently so basically
> with 2 different gateways.
>
> we tried with all the routes,rules etc but only on one vlan we are able to
> ping 8.8.8.8 for instance.
>
> Any suggestions/ideas?
> Cheers
>
>
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Re: [CentOS] Apache (httpd) fails to start at boot - Centos 8.1

[John Pierce]

Just a wild guess, but it sounds like Apache is being started before the
network is online.Is this host simple static Ethernet or DHCP, or is it
something more complicated like WiFi?

I believe you can set service dependencies with systemd, ideally your
apache service isn't started before the network is online.

If you are using WiFi, running a webserver is a bit ugly, perhaps
configuring Apache to listen to 0.0.0.0 (all interfaces) would be a better
choice?
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Re: [CentOS] /etc/networks file

[John Pierce]

On Mon, Jun 15, 2020 at 4:39 AM Stephen John Smoogen 
wrote:

>
> This is an archaic file which is equivalent to /etc/hosts and can be  used
> by various network tools instead of DNS.
> https://linux-audit.com/the-purpose-of-etc-networks/
>
> Other than getent, this file seems to be little use in a default EL7/EL8
> system as route and netstat were 'deprecated' and have to be installed
> outside of default installs.
>


IIRC, the names in /etc/networks would be used in places like ip.wrappers
and NFS exports.   The earliest Solaris networks I worked with made pretty
extensive use of that archaic kinda stuff.


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Re: [CentOS] halt versus shutdown

[John Pierce]

On Sun, Jun 14, 2020 at 6:19 PM Pete Biggs  wrote:

>
> > I'm quite sure that in original Berkeley Unix, as on the VAX 11/780, halt
> > was an immediate halt of the CPU without any process cleanup or file
> system
> > umounting or anything.   Early SunOS (pre-Solaris) was like this, too.
> >
> The SunOS 4.1.2 man page for halt says
>
>NAME
>   halt - stop the processor
>SYNOPSIS
> /usr/etc/halt [ -oqy ]
>DESCRIPTION
> halt writes out any information pending to the disks and then
> stops the processor.
>  halt normally logs the system shutdown to the system log
>   daemon, syslogd(8), and places a shutdown record in the
>   login accounting file Ivar/admlwtmp.
>   These actions are inhibited if the -0 or -q options are present.
>
> The BSD 4.3 (that ran on VAXen) man pages say largely similar things:
>
>
> https://www.freebsd.org/cgi/man.cgi?query=halt=0=0=4.3BSD+Reno=default=html
>
>
ok, so it does a sync then hard halts, but it doesn't gracefully exit
services, or unmount file systems.


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Re: [CentOS] halt versus shutdown

[John Pierce]

On Sun, Jun 14, 2020 at 5:20 PM Pete Biggs  wrote:

>
> > fwiw, i've always used 'init 0' to shut down all sorts of unix/linux
> > systems.
>
> In EL7/EL8, init is now a symlink as well because everything is
> controlled by systemd.
>
> >   On old school unix, and I think even early Linux, halt was an
> > /immediate/ halt, as in catch fire.   might as well hit the power switch.
> >
> Not quite. Shutdown is a timed thing so you can tell it to shutdown or
> reboot at a certain time or after a certain delay and it can broadcast
> messages to the users - it's useful on multi-user systems to be able to
> warn users that the system is about to go down. Halt is an immediate
> thing without any broadcast messages or delay but it does do the halt
> cleanly.  There is an option to halt to not sync the disks - this is
> not a wise thing to do and is an emergency option - certainly the
> original man pages for halt said something like "only do this if your
> disks are on fire".



I'm quite sure that in original Berkeley Unix, as on the VAX 11/780, halt
was an immediate halt of the CPU without any process cleanup or file system
umounting or anything.   Early SunOS (pre-Solaris) was like this, too.




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Re: [CentOS] halt versus shutdown

[John Pierce]

On Sun, Jun 14, 2020 at 4:32 PM Leon Fauster via CentOS 
wrote:

> Working with different OSs can be quite challenging (mentally :-)).
>
> I wonder why the command "halt" has not same result between EL6 and EL8.
>
> To shutdown the vm or workstation in EL8 i must use "shutdown now".
>


fwiw, i've always used 'init 0' to shut down all sorts of unix/linux
systems.   On old school unix, and I think even early Linux, halt was an
/immediate/ halt, as in catch fire.   might as well hit the power switch.
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Re: [CentOS] Postfix restrictions

[John Pierce]

yeah, then don't use a backup MX server at all.  I dropped using one when I
realized most spam prevention would just end up at the backup which didn't
have the same rules

as long as your server has a decent uptime and is never down more than a
few hours and that very rarely, then you really don't need a backup server
at all.


On Mon, Jun 8, 2020 at 7:57 PM Jon LaBadie  wrote:

> On Sun, Jun 07, 2020 at 05:53:28AM -0700, John Pierce wrote:
> > On Sun, Jun 7, 2020, 2:47 AM Nicolas Kovacs  wrote:
> >
> > > 
> > > My aim is simply to eliminate as much spam as possible (that is, before
> > > adding
> > > SpamAssassin) while keeping false positives to a minimum.
> > >
> >
> > The one thing that stopped the most spam on my last mailserver was
> > greylisting.   Any mta that connects to you to send you mail, you check
> > against a white list, and if they are not on it, you reject the
> connection
> > with a 'try again later' code and add them to a grey list that will let
> > them in after 10 minutes or so.   The vast majority of spambots don't
> queue
> > up retries, they just move on to the next target.
> >
> > The downside of greylisting is delayed delivery of mail from non white
> > listed servers, dependent on their retry cycle.
>
> I hit another limitation.  My backup MX handler is a 3rd party who
> will not use greylisting.  Thus all the 1st timers I rejected just
> delivered to my alternate MX address and were not blocked at all.
>
> Jon
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Re: [CentOS] Postfix restrictions

[John Pierce]

On Sun, Jun 7, 2020, 2:47 AM Nicolas Kovacs  wrote:

> 
> My aim is simply to eliminate as much spam as possible (that is, before
> adding
> SpamAssassin) while keeping false positives to a minimum.
>

The one thing that stopped the most spam on my last mailserver was
greylisting.   Any mta that connects to you to send you mail, you check
against a white list, and if they are not on it, you reject the connection
with a 'try again later' code and add them to a grey list that will let
them in after 10 minutes or so.   The vast majority of spambots don't queue
up retries, they just move on to the next target.

The downside of greylisting is delayed delivery of mail from non white
listed servers, dependent on their retry cycle.

I finally gave up on running my own email services and use Gmail which has
excellent spam filtering

>
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Re: [CentOS] yum/dnf diff

[John Pierce]

On Fri, Jun 5, 2020 at 12:35 PM Kenneth Porter 
wrote:

> On 6/5/2020 12:21 PM, Johnny Hughes wrote:
> > if you click on the six digit number, for example, e52775 for the
> > current latest "import 389-ds-base-1.3.10.1-9.el7_8".  The result is
> > every diff of every change for the rpm.
>
> That's quite handy! But not what I'm looking for. I'm trying to figure
> out what edits I made to my config files.
>
>
>
don't most packages create a .rpmnew file if you've modified the previous
package file ?


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Re: [CentOS] Logitech webcam for use with CentOS 7

[John Pierce]

I've used those with Windows w zoom with excellent results...   They don't
require any special driver's so probably work w Linux as is

On Wed, Jun 3, 2020, 4:29 PM H  wrote:

> I am thinking of buying a Logitech C920S Pro HD or C922 webcam for the
> necessary video conferencing.
>
> Is anyone using that with Zoom or perhaps with Jitsi? Do I need drivers?
> Any issues?
>
> Thank you.
>
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Re: [CentOS] Help needed for installing MT7601U Linux driver

[John Pierce]

are you building that driver for use on a Synology DSM ?   if so, thats not
CentOS.

if not, then why are you using a synology fork of the atmel driver?


On Tue, Jun 2, 2020 at 1:14 AM Harsh chopra <
serviceprovider.tes...@gmail.com> wrote:

> Hi everyone,
>
> My PC don't have an integrated WLAN card, so I bought an USB WIFI device
> which use the MediaTek MT7601U chip(image 'dongle.jpg').
>
> --
> My PC specification-
> OS = CentOS 7.8.2003.
> Processor = AMD Ryzen 5 1600.
> Mother-Board = GA-Gigabyte A320M-S2H
>
> ---
> The lsusb lists devices- It is in the attachments below (ls_usb)
>
> Under /lib/modules/3.10.0-1127.el7.x86_64/kernel/driver/net/wireless/ - It
> is in the attachments below (wireless_list)
>
> Under
>
> /lib/modules/3.10.0-1127.el7.x86_64/kernel/driver/net/wireless/ralink/rt2x00
> - It is in the attachments below (ralink_list)
>
> lsmod list - It is in the attachments below (ls_mod)
>
> --
> I found the github page for installing MT7601U Linux driver
> "https://github.com/imZack/mt7601;
>
> I am having trouble in building the driver as the installation process
> requires Synology toolchain
> 
> and kernel source
> <
> http://sourceforge.net/projects/dsgpl/files/Synology%20NAS%20GPL%20Source/5004branch/
> >
>
> But I don't know which toolchain and Kernel source to install also I had to
> manually load the modules rt2800usb.So if anyone have any suggestion
> please let me know.
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Re: [CentOS] ip6tables equivalent for NAT?

[John Pierce]

yes, outbound UDP through the NAT layer adds an entry to the tracking table
which expires after some time.

this sorta explains it...
https://www.linuxtopia.org/Linux_Firewall_iptables/x1544.html


On Tue, May 26, 2020 at 12:59 PM Kenneth Porter 
wrote:

> I figure that TCP is easy: Add a rule to the forward chain to allow SYN
> packets. There's already connection tracking to handle established
> connections. Does connection tracking handle UDP? If I allow all UDP
> from the LAN interface and one sends a DNS query from LAN to WAN, will
> the reply get back? I don't want to blanket authorize all UDP. ICMPv6,
> maybe, to allow traceroutes. Unless that's also handled by the tracking
> system.
>
>
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Re: [CentOS] ip6tables equivalent for NAT?

[John Pierce]

with ipv6, you just allow the specific ports destined to the specific local
machine(s) in on your WAN side, they don't need translating.  same sort of
rule as if you had a internet-facing service running on the routing system

On Tue, May 26, 2020 at 11:55 AM Kenneth Porter 
wrote:

> I finally got an ISP connection with working IPv6 and now I need to add
> firewall rules for forwarding connections from my LAN to the WAN. I'm
> using
> firewalld to handle the high-level description that gets translated to
> iptables/ip6tables on CentOS 7.
>
> Of course, with IPv6, one doesn't do NAT, so the usual masquerade target
> doesn't make sense. But I want similar connection logic, with no inbound
> connections allowed to LAN clients and all outbound connections allowed.
> How does one express this in either firewalld or its ip6tables "direct
> rules"?
>
> I don't currently need port-forwarding to internal servers but, for
> completeness, what would such rules look like?
>
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Re: [CentOS] ether-wake

[John Pierce]

The WoL magic packet is only scanned for the string above, and not actually
parsed by a full protocol stack, it could be sent as any network- and
transport-layer protocol, although it is typically sent as a UDP
 datagram
 to port
 0,]
 7 or 9, or
directly over Ethernet as EtherType
 0x0842

- from Wikipedia

On Sun, May 17, 2020, 6:46 PM R C  wrote:

> Hello,
>
>
> what port does ether-wake use?  (I believe it is port 9? but not sure).
>
>
> Ron
>
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Re: [CentOS] Monitoring network traffic to a host

[John Pierce]

On Tue, May 12, 2020 at 4:44 PM Ian Pilcher  wrote:

> Background - I am having an issue with occassional pauses when streaming
> high-bitrate media across my home network to my smart TV.  I *suspect*
> that the root cause is the (incredibly lame) 100 Mbps Ethernet interface
> in the TV.
>


just looked in my video library, largest file I see is for a multi-language
1080p MP4/x.264 version of Parasite, 2h 11m long, 10GB.

thats 1.3 MB/sec, or about 10 Mbit/sec.   *easily* done on 100baseT.

is there any wireless between your server and the TV client ?

next largest file in 'recent' is The Irishman, also MP4 x.265 1080p, no
subtitles, english-only 5.1 AAC audio, 4.1GB for 3:29 long, thats only
335kByte/sec, or about 3Mbit/sec,  heck you could play that on 10baseT



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Re: [CentOS] no images from www.imdb.com

[John Pierce]

On Tue, May 12, 2020 at 12:37 PM Michael Hennebry <
henne...@web.cs.ndsu.nodak.edu> wrote:

> For some reason, I no longer seem to get images from
> www.imdb.com , i.e. Internet Movie DataBase.
> The effect is really weird.
> I get from Firefox, Konqueror and Chromium.


FWIW, many/most of the images on IMDB seem to come from
https://m.media-amazon.com/images and such...

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Re: [CentOS] Understanding VDO vs ZFS

[John Pierce]

Rather than dedupe at the file system level, I found the application level
dedupe in BackupPC works really well...   I've run BackupPC on both a big
ZFS volume, and on a giant XFS over LVM over MDRAID volume (24 x 3TB disks
organized as 2 x 11 raid6 plus 2 hot spares).   The backuppc server I built
at my last $job had 30 days of daily incrementals and 12 months of
monthlies of about 25 servers+VMs (including Linux, Solaris, AIX, and
Windows).   The dedupe is done globally on a file level, so no matter how
many instances of a file in all those backups ((30+12) * 25), there's only
one file in the 'hive'.Bonus, BackupPC has a nice web UI for retrieving
backups, I could create accounts for my various developers, and they could
retrieve stuff from any covered date on any of the servers they had access
to without my intervention.

about the only manual intervention I ever needed to do over the several
years this was running involved the Windows rsync client needing a PID file
deleted after an unexpected reboot.





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Re: [CentOS] nodejs version 14

[John Pierce]

On Wed, Apr 22, 2020 at 10:43 AM Jerry Geis  wrote:

> Hi All,
>
> I was following the instructions for installing nodejs version 14.
> https://github.com/nodesource/distributions
>
> First thing was:
> curl -sL https://rpm.nodesource.com/setup_14.x | bash -
>
> After that :
>  yum -y install nodejs
> ---> Package nodejs.x86_64 2:12.16.2-1nodesource will be installed
> --> Finished Dependency Resolution
>
> You can see its installing the OLD Version 12. not the 14. ??? Why ?
> (this errors actually)
>


ask "nodesource", the centos project has nothing to do with that repository.

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Re: [CentOS] Samba Status code returned 0xc000006d NT_STATUS_LOGON_FAILURE SessSetup = -13

[John Pierce]

Unix to unix within a data center, I prefer NFS

On Tue, Apr 14, 2020, 10:29 PM Ralf Prengel 
wrote:

>
> Zitat von John Pierce :
>
> > Mount.smb is way down-rev.  It doesn't support the newer smb options
>
> Hallo,
> thanks for the fast answer.
> What would be the right way to mount using /etc/fstab?
> Do you have an example?
>
> Ralf
>
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Re: [CentOS] Samba Status code returned 0xc000006d NT_STATUS_LOGON_FAILURE SessSetup = -13

[John Pierce]

Mount.smb is way down-rev.  It doesn't support the newer smb options




On Tue, Apr 14, 2020, 9:46 PM Ralf Prengel  wrote:

>
> Hallo,
> perhaps someone hat a hint vor me.
> My centos 7 samba Server ist working fine using Win10 Clienst with
> Domaine-Integration.
> Shares are browseable and access is possible with a sepearte login.
>
> My problem:
> I want to mount this shares from a centos7 client.
> This fails with the following mesages.
> I tried several variations in my fstab found in the internet.
> Can anyone give me a hint to to access an samba-server that is working
> fine against a Win2016  Domain-Cotroller?
>
> Thanks
> Rakf
>
>
>
> Apr 15 05:37:47 6805ca01a270 kernel: Status code returned 0xc06d
> NT_STATUS_LOGON_FAILURE
> Apr 15 05:37:47 6805ca01a270 kernel: CIFS VFS: Send error in SessSetup =
> -13
> Apr 15 05:37:47 6805ca01a270 kernel: CIFS VFS: cifs_mount failed
> w/return code = -13
> Apr 15 05:37:52 6805ca01a270 kernel: Status code returned 0xc06d
> NT_STATUS_LOGON_FAILURE
> Apr 15 05:37:52 6805ca01a270 kernel: CIFS VFS: Send error in SessSetup =
> -13
> Apr 15 05:37:52 6805ca01a270 kernel: CIFS VFS: cifs_mount failed
> w/return code = -13
>
>
> smb.conf
>
> [global]
>  Workgroup = COMLINE
>  security = ads
>  encrypt passwords = yes
>  passdb backend = tdbsam
>  realm = comline.de
>  printing = cups
>  printcap name = cups
>  load printers = yes
>  cups options = raw
>  map to guest = bad user
>
> [share_gov_srvgovrcpbuild_clients]
>  comment = share für gov projekt rcpbuild clients
>  path = /mnt/raid01/share_volumes_gov_srvgovrcpbuild_clients_smb
>  browseable = yes
>  comment = Share für alle
>  guest ok = yes
>  writeable = yes
>  read only = no
>  force user = root
>  create mask = 0777
>  directory mask = 0777
>  public = yes
>
>
>
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Re: [CentOS] CentOS 8 NIS

[John Pierce]

On Sun, Apr 12, 2020 at 6:43 PM Mark LaPierre  wrote:

> On 2020-04-12 08:13, Jonathan Billings wrote:
> > On Apr 12, 2020, at 05:47, Pete Biggs  wrote:
> >> There are other options than LDAP, and servers other than OpenLDAP, but
> >> LDAP is the de facto standard.
> >
> > Unfortunately,  OpenLDAP as a server is deprecated in C8, and isn’t
> packaged anymore.  Upstream they point customers to their directory
> service, which is based on 389 directory service.
> >
>
> Okay, I found
>
> https://directory.fedoraproject.org/docs/389ds/download.html.
>
> Thank you for the useful reply.
>
> It appears that they just pasted a new name on an old horse.  It's still
> LDAP.
>
>
yes, its the standardized LDAP protocol...

it is, however, a completely different implementation, so no, its not
OpenLDAP, which is a specific implementation.



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Re: [CentOS] CentOS 8 NIS

[John Pierce]

On Wed, Apr 8, 2020 at 8:48 PM Warren Young  wrote:

> On Apr 8, 2020, at 6:42 PM, Mark LaPierre  wrote:
> >
> > Does anyone know where I can get NIS for CentOS 8?
>
> $ dnf provides ypserv
> ...
> ypserv-4.0-6.20170331git5bfba76.el8.x86_64 : The NIS (Network Information
> Service) server
>
>
> do people really still use NIS ?!?   I mean, I remember using it in the
mid to late 90s on a network of Sun Solaris systems (after all, they
virtually invented it), but we got rid of it by the mid 2000s because its
simply not secure by any rational definition, and only really suitable on a
network where everyone trusts everything attached to the network, that
world simply doesn't exist anymore.

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Re: [CentOS] Upgrade from Centos 7 to Centos 8

[John Pierce]

Huh?I did remote installs all the time at my last $job.It's easiest
if it's either a VM or a physical server with IPMI

On Wed, Apr 8, 2020, 9:57 AM Stefano Simonucci <
stefanosimonucci@alice.it> wrote:

> OK. I understand. Unfortunately the server has been assigned to me
> remotely and I cannot physically reinstall Centos 8.
>
> Thank you very much.
>
> Stefano
>
> On 08/04/20 18:17, Jonathan Billings wrote:
> > On Wed, Apr 08, 2020 at 05:50:44PM +0200, Stefano Simonucci wrote:
> >> I followed the directions found on the web (by installing dnf and so
> on),
> >> but when I tried to install centos-release I get
> > Unfortunately, there are a lot of web sites out there with bad
> > information.
> >
> > There's no support for updating from C7 to C8.  It's likely to result
> > in a broken system even if you are careful and know what you're
> > doing.
> >
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Re: [CentOS] C8 and backup solution

[John Pierce]

On Fri, Apr 3, 2020 at 6:58 AM Chris Adams  wrote:

> It isn't just databases - there are other things that backing up
> individual files one at a time is not so good.  The best way to handle
> that is to freeze/snapshot the whole filesystem, and then back up the
> snapshot.  This can be scripted pretty easily if the filesystem is on
> LVM.
>

I tried this with a fairly busy and rather large database server (ok, it
was a database server running a simulation of a production workload) and
LVM (with either ext4 or xfs)  and found LVM snapshots to be completely
unworkable under busy 8K block random write workloads

now, ZFS does snapshots very nicely



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Re: [CentOS] C8 and backup solution

[John Pierce]

Do note, backup systems that use rsync or similar file by file copies of a
running system do not make coherent atomic snapshots, so things like
relational databases should be excluded from those, and backed by database
tools
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Re: [CentOS] CentOS 8 Gstreamer and Mplayer

[John Pierce]

On Mon, Mar 30, 2020 at 7:19 PM Mark LaPierre  wrote:

>
>
> Perhaps there's another repo like epel for CentOS 8 where these toys live?
>
>
yes, rpmfusion is that repo.




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Re: [CentOS] CentOS 8 Gstreamer and Mplayer

[John Pierce]

On Mon, Mar 30, 2020 at 3:16 AM Bob Marcan  wrote:

> vlc centos 8
>

yeah, I dig VLC, I use it on multiple platforms, and it consistently seems
to be able to play everything without any nonsense.

Looks like rpmfusion is the distro of choice for it on Centos/rhel 8




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Re: [CentOS] directfb on CentOS 7

[John Pierce]

On Fri, Mar 27, 2020 at 11:38 AM Jerry Geis  wrote:

> I have another package (baresip) that needs "directfb".
>

good luck.per
https://www.phoronix.com/scan.php?page=news_item=DirectFB-2017-Dormant
 directFB project has gone dormant and awol, its websites vanished.



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Re: [CentOS] Re-configuring BIND DNS Servers for CentOS Web Panel Web Hosting Control Panel on Amazon AWS Cloud

[John Pierce]

On Thu, Feb 27, 2020 at 6:40 AM Turritopsis Dohrnii Teo En Ming <
teo.en.ming.feb9...@gmail.com> wrote:

> Subject: Re-configuring BIND DNS Servers for CentOS Web Panel Web
> Hosting Control Panel on Amazon AWS Cloud..
>

please stop spamming this list with cPanel crap.



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Re: [CentOS] OwnCloud vs NextCloud

[John Pierce]

OwnCloud came first, but IIRC, when the business managers took it partially
commercial, the original developer split and forked it to make NextCloud as
he didn't like the OwnCloud policies [1]




[1]
https://karlitschek.de/2016/04/big-changes-i-am-leaving-owncloud-inc-today/



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Re: [CentOS] anybody runs HPE ProLiant DL385 Gen10 ?

[John Pierce]

in general, servers are pretty picky about their rams... I would only ever
use either real HP branded memory(especially if the machine is on service
contract), or certified compatible memory from the likes of Crucial.

the quickspecs of that server list the specific speeds it will use.   note
it slows down when you fully populate it with all 32 dimms, so the optimal
performance setup would be 16 dimms of the same size/type (assuming 2 CPUs
installed, of course, if only one CPU, then cut those numbers in half).
https://h20195.www2.hpe.com/v2/GetDocument.aspx?docname=a00026913enw

On Mon, Feb 17, 2020 at 9:34 AM lejeczek via CentOS 
wrote:

> hi guys,
>
> what I would like to ask is DDR4 3200Mhz in these server - has anybody
> tried?
>
> many thanks, L.
>
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Re: [CentOS] Kernel downgrade on Centos 8

[John Pierce]

>
> Kernel 3.10 in C7 is way to old to reliably support the 4.18 based C8
> runtime.


>
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Re: [CentOS] ntfs support

[John Pierce]

On Sat, Feb 1, 2020 at 1:31 AM wwp  wrote:

>
> Definitely, ntfs-3g is from the EPEL repo:
> # yum info ntfs-3g
> Installed Packages
> Name: ntfs-3g
> Arch: x86_64
> 


but is it available in x86 32 bit ?

me, I've never trusted ntfs on linux, and would rather have a windows
machine mount and serve it over SMB or whatever.


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Re: [CentOS] CentOS 8 lokkit

[John Pierce]

I think firewalld is the replacement.lokkit was pretty limited in
capabilities.

On Fri, Jan 31, 2020 at 10:19 AM Stephen John Smoogen 
wrote:

> On Fri, 31 Jan 2020 at 12:36, Jerry Geis  wrote:
>
> > hi All -
> >
> > I tried doing:
> > yum provides "/usr/sbin/lokkit"
> > on CentOS 8 and got No Matches found.
> >
> > Where can I get his for C8?
> >
> >
> As far as I know you can't. It was last supported in Fedora in
> F23 2015-03-02 and was removed in later releases. It would need a major
> rewrite to work with how things are 'different' between F18/19 (RHEL-7) and
> F28/29 (RHEL-8)
>
>
>
> > Jerry
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>
>
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Re: [CentOS] Twin HDMI

[John Pierce]

On Fri, Jan 17, 2020 at 8:53 AM Mark (Netbook)  wrote:

> I have an Intel NUC7PJYH running CentOS 6.8. This is a NUC with standard
> USB, 1GbE and 2*HDMI.


FWIW, that has a Pentium Silver J2005, which has Intel® UHD Graphics 605

thats fairly new stuff, and centos 6 is pretty old now.

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Re: [CentOS] Centos 8 and E1000 intel driver

[John Pierce]

On Fri, Jan 17, 2020 at 3:16 PM david  wrote:

> Folks
>
> I know that support for the network adaptors supported by the 'e1000'
> driver have been removed from the base distribution.  However, I have
> exactly that controller (Broadcom Gigabit Ethernet PCI, not
> PCIe).  Is there a way for me to add support for that on Centos
> 8.1?  Perhaps a driver in an RPM package?
>
>
e1000 is Intel, not Broadcom.   Broadcom drivers are generally BCM
something, like bcm5700



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Re: [CentOS] Centos 7 32 Bits install.

[John Pierce]

On Sun, Jan 12, 2020 at 7:55 AM Ger van Dijck 
wrote:

> Question : Can I install Centos7 32 Bits on a computer i386 32 bits
> little
> indian pentium III Copermine Model8 Cpufamily 6 CpuMhz 863.979 (lscpu)
> grep -i pae /proc/cpuinfo gives a flag pae .
>


Thats a 20 year old computer.   It likely uses a bunch of really obsolete
stuff like AGP video.

Personally, I wouldn't even try, C7 32 bit is something of a bastard child
in that RHEL 7 is 64 bit only, and there's very little usage or testing on
the centos-only 32 bit version.


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Re: [CentOS] Does Centos kernel support usb w/ UASP ?

[John Pierce]

On Sun, Dec 29, 2019 at 8:01 PM Fred Smith 
wrote:

> Looking to buy a new usb-attached RAID box for nightly backups, and
> I see that many of them now support usb 3.1 with UASP.
>

I'd rather have a NAS that supports NFS and/or SMB and lives on ethernet,
so any host on your LAN can use it as a backup target.

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Re: [CentOS] State of CentOS 8

[John Pierce]

On Tue, Dec 24, 2019 at 12:57 AM Nicolas Kovacs  wrote:

> That's missing the point.
>
> While it's perfectly understandable that there's always a certain lag
> between upstream RHEL and CentOS, seven weeks without security updates
> is a serious showstopper for production use.
>
> There's a difference between "use upstream Red Hat if you badly need
> those critical updates" and "don't use CentOS on your production servers".
>

on the other hand, 99% of those security updates are things that probably
don't affect most centos deployments.


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Re: [CentOS] State of CentOS 8

[John Pierce]

On Sun, Dec 22, 2019 at 5:30 PM Bill Maidment  wrote:

> > https://wiki.centos.org/About/Building_8
> >
> > https://wiki.centos.org/About/Building_8.x
> >
>
> This misses the point of where are the intermediate updates to 8.0 ? or
> can we only get point releases with no updates in between?
>
>
8.0 has to be updated to 8.1 to get any future updates.apparently 8.1
came out in early November before CentOS was able to get the update
pipeline moving, so incremental updates will resume after 8.1 is released,
which should be pretty soon now based on the schedule on that 8.x page
above.


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Re: [CentOS] Using Pulse Audio--question

[John Pierce]

On Sun, Dec 22, 2019 at 5:23 PM David G. Miller  wrote:

> I do something similar to what you're trying to do when I digitize my
> vinyl LPs.  I take output from my amp/turntable into my sound card and
> use Audacity to digitize it and write an appropriate sound file.  I also
> monitor the sound using Audacity by telling it to also route the sound
> to my speakers.  The point of all of this is that I think you need a
> piece of software (Audacity is probably overkill) to receive the input
> and play it back via the output.  You don't mention any "playback"
> software.
>

on many analog sound cards, the output mixer has a 'monitor' channel for
the input mixer, so if you crank up the Line IN on the input mixer, then
turn up the 'monitor' output on the output mixer, you should get
passthrough audio without any software getting involved in moving the sound
in realtime.

this is much less likely to work with a seperate USB audio source, as thats
not directly connected to your output.   ditto it won't work with  USB
speakers or headphones, as they are not directly connected to the source.

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