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Unrar not extracting archive

I received a rar-archive, probably created on Win10, that I could not extract with unrar on CentOS 6.

Is it possible that the version of unrar available for CentOS 6 does not support potentially new archiving algorithms used by some newer archiving program (don't know which one was used) on Win 10? I was later able to extract the files using another program on a WinXP computer. Defeat...

CentOS-announce Digest, Vol 155, Issue 5

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Today's Topics:

1. CESA-2018:0101 Important CentOS 6 bind Security Update
(Johnny Hughes)
2.

failure to start httpd after today update

Hello,

I ran today update of my CentOS 6.9 running on Dell T105 (AMD OPTERON) and httpd failed to start. Any idea what could cause that? I never had a problem after CentOS 6.x update. Web server runs since March 2017. I do updates usually once in a week.

Thank you

Mikhail Utin

Document/collaboration server advise needed

Dear All,

Three groups of scientists need to write documents collaboratively. They
are going to use MS PowerPoint, Word, also store PDF files. They want to
be able to add external people from other groups they collaborate with
and give them access to some areas or "projects". In other words, they
want some collaborative work environment, mostly to work on documents.

In the past scientists were using TeX, and one of version control
systems (CVS, subversion,...).

repodata out of sync for centos6-updates

Hi,

I wanted to update the bind package on our centos-6 servers, and the
package is there for the mirrors I've checked, but the repodata dates
back from January 18. May be I'm too fast and the repodata update comes
later. If so how long can it take?

Cheers, Christian.

virt-manager change to bridged networking on CentOS 7.4

Hi All,

I have virt-manager running just fine currently using NAT.

I want to "change" it to bridged network. The GUI is not letting me change
anything on the network section.

How do I change it to be bridged ?

Thanks,

Jerry

best centos server setup for graphics intensive kvm vms?

Hallo list

I've been running fedora for donks as my production laptop os, but now
I want to set up one of those old laptops to run as a home server
running a number of home type vm appliances.

How to upgrade CentOS 6.9 KVM host to 7.4.1708 and not re-install guests

I have a Windows 7 KVM guest running on a Centos 6.9 KVM host. I would
like to upgrade the host system to CentOS 7.4.1708 without having to
re-install from scratch the KVM guest. What procedure should I use to
move the guest off the host system, upgrade the CentOS version and then
move the KVM Guest back to the host? For example, Is there a recommended
way to move the KVM Guest to a USB stick and then move it back to the
upgraded host? Thank you for your help.

An rpm specfile quesstion

I've built an rpm package to distribute an executable and datafiles, but I
need to link to the executable, with the symlink with a different name,
into /usr/sbin/

If I make the symlink in the %post, it doesn't show if you do rpm -ql, and
/usr/sbin/link gives "not owned by any package".

CentOS-announce Digest, Vol 155, Issue 4

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Today's Topics:

1.

Minor problem with yum-cron

Hello everyone -

I have a minor problem with yum-cron. It has been doing this for a long time,
and finally today I got annoyed enough to want to fix it.

The problem: When yum-cron sends an email notification, the message is sent
without a date field. Therefore it shows up in my inbox as "date: Unknown"
and sorts to the opposite end of the list.

The system is CentOS 7.4.1708 with all patches.

CentOS-announce Digest, Vol 155, Issue 3

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Today's Topics:

1.

/lib/firmware/microcode.dat update on CentOS 6

Dear All,

An update just brought on my CenOS 6 boxes updated microcode.dat files:

/lib/firmware/microcode.dat

Does anybody know off hand what (how critical) is that, as, if it is
related to most famous these days trouble with CPU hardware, I will need
to reboot relevant boxes to have new microcode loaded.

sshfs mounting on Centos 6.9

Hi all,

I am trying to mount on boot a sshfs filesystem.

I have tried this in /etc/fstab

... at myserver dot com:/home/backup/myserver /backup fuse.sshfs
nonempty,allow_other 0 2

but only works when network works.

I have also tried this in my crontab:

@reboot sshfs -o idmap=backup myserver.com:/home/backup/myserver /backup

but doesn´t seem to work either.

What else can I try?

Thanks,

Miguel

Squid + wccp + firewalld

Hi Everyone,

I'm trying to get squid + wccp on a Centos 7 box working with a Cisco
router. I've done this before several times using Centos 6 and
iptables, but never on Centos 7 with firewalld.

I've searched far and wide for clear, concise instructions on how to do
what I want in Centos 7. I've pieced together what I've found to come
up with what I thought should work. Unfortunately, squid simply refuses
to respond.

At the moment, it looks like squid isn't forwarding the requests it's
receiving from the router over the GRE tunnel interface.

Hello!

To whom it may concern,

 Hello,I am Hideki Momokita,I joined last time.
 I work in IT Security at The MRC Foundation. I am Japanese. I was
sending it from Osaka in Japan. Sorry,I am poor at English.

Best regards,
Hideki Momokita.

el7 systemd :: usage of AssertPathExists

Hi! I am trying to use AssertPathExists in a systemd unit but it seems
it not working.

Is kernel-3.10.0-693.11.6.el7 tested with old hardware?

Today we tried to update machines w/ Core2 Duo E6750 from
3.10.0-693.11.1.el7.centos.plus to 3.10.0-693.11.6.el7.centos.plus and
the machines did not boot due to a kernel panic.

Before we dig any further I wanted to know if the 11.6 kernel has been
tested on old hardware, too, or if the problem is well known but not
documented (yet).

Thank you in advance!

Gerhard Schneider

lshw in centos 7

Folks

I've been running lshw for years in both Centos 6 and Centos 7, yet
just recently it started hanging. Neither a Control^C nor a "kill"
of the process cured the hang; only a reboot.

When I run it by hand from the command line, it displays stuff on the
next line overwriting it with things like PCI, USB. And USB is the
last thing I see. A Control-C does not unlock it.

I am running lshw-B.02.18-7.el7.x86_64. The CPU is an Intel
I7-3770K, running CentOS 7.4.1708

Is there any idea?

CentOS 7 autofs flakyness

I have a user who couldn't get in via WinSCP to a server. Got him to log
in via putty, and that was fine. But he still couldn't get in the other
way. At my manager's suggestion, I restarted autofs... and everything
worked.

Note that his home director5y was already automounted via NFS, after he
logged in via putty. We've seen other, similar oddities with NFS.

1600x900 not available

My laptop is a Dell XPS-13 running CentOS 7.  It has a 13" 1920x1080
screen and it's a bit difficult for my mid-40s eyesight.  Fedora and
Debian, on this laptop, give me the option of choosing 1600x900 which is
much easier for me to read but CentOS doesn't show this resolution as
available.

I followed the steps I found in a post on stackexchange using xrandr,
substituting 1600x900 where applicable and it worked but, once I
rebooted, it went back to 1920x1080 with no 1600x900 option in
settings-display.

Is there a way I can add 1600x900 resolution the list of available
resolutions in

soft lockup after set multicast_router of bridge and it's port to 2

After I set multicast_router of bridge and it's port to 2, like following:
echo 2 > /sys/devices/virtual/net/eth81/bridge/multicast_router
echo 2 > /sys/devices/virtual/net/bond2/brport/multicast_router
Then soft lockup occured:
Message from syslogd@node-0 at Jan 9 15:47:12 ...
kernel:BUG: soft lockup - CPU#0 stuck for 61s!

FreeIPA - client/replica errors

hi, free IPA everyone?

I wanted to ask if you maybe seen below errors.

CentOS Linux 7 (1708) AltArch i386 Kernel

Red Hat no longer maintains the i386 kernel for RHEL 7.4.  We have been
using a modified kernel until this latest meltdown / spectre  release
(*kernel-3.10.0-693.11.6.el7*).

This latest release does not build on i386/i686 and we can't figure out
how to make it work. 

Build try:
<a href="https://buildlogs.centos.org/c7.1708.u.i386/kernel/20180109171431/3.10.0-693.11.6.el7.centos.plus.i386/" title="https://buildlogs.centos.org/c7.1708.u.i386/kernel/20180109171431/3.10.0-693.11.6.el7.centos.plus.i386/">https://buildlogs.centos.org/c7.1708.u.i386/kernel/20180109171431/3.10.0...</a>

SRPM:
<a href="http://people.centos.org/hughesjr/kernel-3.10.0-693.11.6.el7.centos.plus.src.rpm" title="http://people.centos.org/hughesjr/kernel-3.10.0-693.11.6.el7.centos.plus.src.rpm">http://people.centos.org/hughesjr/kernel-3.10.0-693.11.6.el7.centos.plus...</a>

In the mean time, people running the altarch i386 distribution can the
latest i386 experimental kernel ..

update to Centos7.4: Failed to open \EFI\BOOT\grubx64.efi - Not Found

Hello All,

updating from Centos7.3 to Centos7.4 rendered one of our laptops unbootable.
EM:
Failed to open \EFI\BOOT\grubx64.efi - Not Found
Failed to load image \EFI\BOOT\grubx64.efi: Not Found
start_image() returned Not Found

How could this occur because of an update and how to fix this?

What I tried is booting from centos usb, chroot to /mnt/sysimage and gave command:
efibootmgr --create --label CentOS --disk /dev/sda1 --loader "\EFI\centos\shim.efi"

This gave no EM, but booting remains impossible.

I have to say I don't know whether to try grub2 of efibootmgr commands.

CentOS-announce Digest, Vol 155, Issue 2

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<a href="mailto:centos- ... at centos dot org">centos- ... at centos dot org</a>

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or, via email, send a message with subject or body 'help' to
<a href="mailto:centos-announce- ... at centos dot org">centos-announce- ... at centos dot org</a>

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than "Re: Contents of CentOS-announce digest..."

Today's Topics:

1.

Cent OS 7.3 Shared library issue

Hi Guys,

I am using my native library to run but during runtime, its picking the
default library i.e. /usr/lib/libssl. Due to this, my application crashes.

But after adding the Soft link for my native library, its working fine.

Can anybody Please let me know why its not working without adding softlink
in cent os 7.3.

C6 KPTI cpuinfo flag?

Noticed C6 had a kernel update on Friday.
2.6.32-696.18.7.el6.x86_64
What is the flag in /proc/cpuinfo that indicates the KPTI patch for
Meltdown CVE-2017-5754 for C6?

Some distros are using "kaiser" some like Fedora are using "pti". Also
noticed some (like Fedora) are displaying "cpu_insecure" under the
bugs: heading of cpuinfo.

CentOS 7.4 fails to boot as Xen PV guest: resurfaces (now also) with centosplus kernel 693.11.6.el7

Dear all,

Maybe I'm the only one - so before filing it as a bug: it appears that
the latest set of kernel patches in 3.10.0-693.11.6.el7 makes issue
0013763 "CentOS 7.4 kernel (3.10.0-693*) fails to boot as Xen PV guest"
re-surface *also* with the CentOS PLUS kernel.

Bug in gnome-control-center and network edit module in Centos 7.4

Everyone,

I have been having a problem in setting up gateway/routers with Centos
7.4 machine and finally figured out the problem today. I am not sure
if this bug occurred first in 7.3 but it is definitely in 7.4.

CentOS-announce Digest, Vol 155, Issue 1

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<a href="mailto:centos- ... at centos dot org">centos- ... at centos dot org</a>

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or, via email, send a message with subject or body 'help' to
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Today's Topics:

1.

CVE-2017-5715, CVE-2017-5753 and CVE-2017-5754

Hello,

will there be updates for these CVEs for CentOS 6?

Thanks,
Walter

possible issue with nvidia and new patches?

Twitter user stintel, in this thread:

<a href="https://twitter.com/stintel/status/948499157282623488" title="https://twitter.com/stintel/status/948499157282623488">https://twitter.com/stintel/status/948499157282623488</a>

mentions a possible problem with the new patches and the
nvidia driver:

"As if the @Intel bug isn't bad enough, #KPTI renders @nvidia driver
incompatible due to GPL-only symbol 'cpu_tlbstate'. #epicfail"

Also:

<a href="https://twitter.com/tomasz_gwozdz/status/948590364679655429" title="https://twitter.com/tomasz_gwozdz/status/948590364679655429">https://twitter.com/tomasz_gwozdz/status/948590364679655429</a>

<a href="https://twitter.com/BitsAndChipsEng/status/948578609761054721" title="https://twitter.com/BitsAndChipsEng/status/948578609761054721">https://twitter.com/BitsAndChipsEng/status/948578609761054721</a>

Cheers,
Zube

Issues with qt-creator from EPEL 7

Hi,

Is anyone here using the "EPEL" package for qt-creator on CentOS 7? I'm
having a few issues with it, and I though I'd run them by the list
before I try Qt Forums or whatever (since they could be specific to the
above mentioned build.) Most notably,

1. If I click on an error message in the "Issues" list after
compilation (to display source code related to the error), I
sometimes get a "File not found" message *if the file in question is
already open*. If I close the file and repeat, the same file opens
just fine.
2.

Nvidia maximum pixel clock issue in kmod-nvidia-384.98

Hi everyone,

On CentOS 7 I'm running into an issue with the latest nvidia driver
from elrepo: kmod-nvidia-384.98-1.el7_4.elrepo.x86_64
This driver version seem to introduce issue in detecting video modes
when a monitor is connected using DVI. As soon as the machine attempts
to start X, nothing happens and the monitor goes into sleep mode
reporting that it has 'no signal'.

It is interesting because it occurs with several monitors, but only
when they are connected through DVI.

Identifying Official CentOS AWS AMIs

I'm trying to automate identification of CentOS AWS images. It appears
that official CentOS AMIs have an OwnerID value of 410186602215, but
I'm not sure if that value is transient or specific to one or more
AWS regions.

Is there a maintainer lurking here that can confirm or deny?

Here's the base query I'm testing:

aws ec2 describe-images \
--owners 410186602215 \
--output text \
--query 'reverse(sort_by(Images, &CreationDate))[?starts_with(Description, `CentOS Linux 7`)].[ImageId, CreationDate, Description]'

DHCP timeout and mysteriously dropping IP address

Hi everyone,

I'me having trouble with a CentOS 7 guest running on a Hyper-V host. For
some reason, the CentOS guest randomly drops its IP address. Running
"systemctl restart NetworkManager" on the console will restore IP
connectivity without a reboot. I think that DHCP is timing out, but I'm not
sure what to do about it.

Gtkcdlabel + cdlabelgen on CentOS 7 ?

Hi,

I've been using the nifty little application Gtkcdlabel for making CD
and DVD covers since 2005, if I remember correctly. Later versions are
written in Python, and it's a graphical frontend to the cdlabelgen utility.

The application doesn't look very well maintained, since the 1.15
release dates back to 2011. Nevertheless, I've been successfully running
it on Slackware Linux until the latest 14.2 release.

I'm currently trying to install it on CentOS 7, and I'm only having a
partial success, with a showstopper.

CentOS 7 + KDE : post-installation script

Hi,

I just spent two rainy days writing and fine-tuning a post-installation
script for CentOS 7 and KDE.

<a href="https://github.com/kikinovak/centos-7-desktop-kde" title="https://github.com/kikinovak/centos-7-desktop-kde">https://github.com/kikinovak/centos-7-desktop-kde</a>

I've just tested it on three different machines here, and it works quite
nicely. Feel free to give it a spin and make some suggestions.

Cheers,

Niki

OpenVPN server and firewalld

How do I insert the iptables rule below using firewalld?

I'm moving up from CentOS 6 to 7 on an office gateway and I'm trying to get
OpenVPN working to allow home workers to access PCs at the office. I've got
it all working but only by manually inserting an ACCEPT rule in the FORWARD
iptables chain:

iptables -I FORWARD 3 -i tun+ -j ACCEPT

This rule was extracted from my iptables firewall under CentOS6. The 3 puts
it after the accepts for established connections and loopback connections,
but before any firewalld sub-chains.

Centos 7 and btrfs

I am setting up a new test server. Doing a fresh install from CD onto
a couple 4TB drives. Would like to try btrfs in a RAID 1 format. Are
there any how to's on how to do that?

Can't see register value in crash vmcore

Kernel crashed by panic("string"), but I can't see any register in vmcore:

crash> bt
PID: 53331 TASK: ffff880c523ed540 CPU: 2 COMMAND: "bw_sd-ar-7-0_2"
#0 [ffff880c4f12f978] machine_kexec at ffffffff81038ed9
#1 [ffff880c4f12f9d8] crash_kexec at ffffffff810c5a82
#2 [ffff880c4f12faa8] panic at ffffffff815113b2
#3 [ffff880c4f12fb28] sd_submit_bio at ffffffffa0747a02 [sd]
#4 [ffff880c4f12fb68] submit_clone_bio at ffffffffa0747d2b [sd]
#5 [ffff880c4f12fb78] split_and_submit_bio_for_cbd at ffffffffa0747ec9 [sd]
#6 [ffff880c4f12fbf8] sd_make_request at ffffffffa074c812 [sd]
#7 [ffff880c4

An rpmbuild spec question

I'm trying to build a package to create a directory and install some
files. My rpmbuild keeps failing, unable to cd into the directory, "no
such". Now, in the tmpfile, I *see* it cd'ing into BUILD/opt, and the
source was unzipped and untared into BUILD/opt/smipmicfg-1.27.0. In the
spec file, I've even added a cd $RPM_BUILD_ROOT/opt, and I see it cd to
there... and then it says it fails cd'ing into the directory under it.

I've been doing a lot of googling, but nothing seems to fix this.

(Dovecot) Package repository now available (fwd)

If you use CentOS as a mail server, you can now get the latest version of
Dovecot (the IMAP and POP3 server) at the new Dovecot repo.

Dovecot now has package repository for Debian, CentOS and Ubuntu available
at <a href="https://repo.dovecot.org/" title="https://repo.dovecot.org/">https://repo.dovecot.org/</a>

Packages are provided for 2.3 series and forward.

CentOS-announce Digest, Vol 154, Issue 4

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<a href="mailto:centos- ... at centos dot org">centos- ... at centos dot org</a>

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than "Re: Contents of CentOS-announce digest..."

Today's Topics:

1.

Does anyone know how to get clipboard and mouse integration in Centos vm?

Hi,

I am running a Centos 7 vm under FreeBSD, and it works very well now,
with KDE installed from DVD iso.

But there's a couple of things missing, which happens only with Centos
vm (Virtualbox):

1) Despite clipboard sharing enabled, copy-paste just does not work
between host and guest

2) Mouse integration does not work. So I have to repeatedly capture
mouse manually both in the host and in the guest.

If anyone could provide me tips how to tweak the above, it shall help me
a lot.

firewalld

I have two VMs, both with firewalld installed.

Unable to run TeamViewer 13 under Centos 7 (amd64)

Hi,

I am writing a book about Unix (Linux / FreeBSD) and my book needs
documentation for TeamViewer13 running under Centos 7 (64-bit).

Unfortunately, running TeamViewer does not get me a GUI -- the install
went smoothly and teamviewerd daemon is running.

This happens only under Centos. Under Manjaro, the same tarball
(teamviewer_13.0.5494_amd64.tar.xz) gets me a nice TeamViewer window.
But I need documentation for Centos.

I have tried reinstalling via rpm (teamviewer_13.0.5693.x86_64.rpm), but
that does not improve things.

CentOS-announce Digest, Vol 154, Issue 3

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<a href="mailto:centos- ... at centos dot org">centos- ... at centos dot org</a>

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Today's Topics:

1.

kernel: blk_cloned_rq_check_limits: over max segments limit., Device Mapper Multipath, iBFT, iSCSI COMSTAR

Hi,

WARNING: Long post ahead

I have an issue when starting multipathd. The kernel complains about "blk_cloned_rq_check_limits:
over max segments limit".

The server in question is configured for KVM hosting. It boots via iBFT to an iSCSI volume. Target
is COMSTAR and underlying that is a ZFS volume (100GB). The server also has two infiniband cards
providing four (4) more paths over SRP (SCSI RDMA Protocol).

broadcom and centos 7

Hi all,

A year or two ago, I installed CentOS 7.0 (or 7.1) on an old MacBook
Pro, and compiled the Broadcom drivers as documented here:

<a href="https://wiki.centos.org/HowTos/Laptops/Wireless/Broadcom" title="https://wiki.centos.org/HowTos/Laptops/Wireless/Broadcom">https://wiki.centos.org/HowTos/Laptops/Wireless/Broadcom</a>

After not using it for a while, I recently resurrected it, and updated
to 7.4. Unfortunately that page has not been updated in a while, so
only documents compiling for 7.3.

Centos7: backup with rsync problem: "rsync: rsync_xal_set: lremovexattr(""/tmp/test/etc/fstab"", "security.selinux") failed: Permission denied (13)"

If I run this command in order to backup /etc from remote server to
local dir I get a lot of this message:

[root@s-virt tmp]# rsync -a --delete --numeric-ids --relative --delete-excluded --compress --acls --xattrs rsync://server-dati/root/etc/ /tmp/test/ -v
receiving incremental file list
rsync: rsync_xal_set: lremovexattr(""/tmp/test/etc/fstab"","security.selinux") failed: Permission denied (13)
rsync: rsync_xal_set: lremovexattr(""/tmp/test/etc/resolv.conf"","security.selinux") failed: Permission denied (13)
rsync: rsync_xal_set: lremovexattr(""/tmp/test/etc/rsyncd.conf

Offsite hosted backup solutions

Given all the vendors that provide this service with both Windows and
Linux clients, Code42 is the only one I am aware of that supports sets.
For me, this was essential to prioritize urgent data over low risk changes
in the event a disaster occurs while a large directory is taking days to
upload.

Centos 7: avc: denied { reload } for auid=0 uid=0 gid=0 cmdline="/usr/bin/systemctl reload named-chroot.service" ....

How to resolve this SElinux problem?

type=USER_AVC msg=audit(1513478641.700:1920): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied { reload } for auid=0 uid=0 gid=0 cmdline="/usr/bin/systemctl reload named-chroot.service" scontext=system_u:system_r:logrotate_t:s0-s0:c0.c1023 tcontext=system_u:system_r:init_t:s0 tclass=service exe="/usr/lib/systemd/systemd" sauid=0 hostname=? addr=?

GUI/X11 login and shells other than bash?

Dear Experts,

After one of updates that was released some time ago (a Month ago or maybe
even earlier) I have noticed the following. On the machines with default
runlevel 5 (sorry about old terminology, the new one is still confusing
for me ;-) GUI/X11 login (display manager) lists only users whose default
shell is bash.

Traffic shaping on CentOS

I'm deploying a CentOS 7 box as a gateway and I'm trying to figure out how
to set up traffic shaping. Historically I've used the Wondershaper script
but apparently it's not deprecated in favor of superior queue management. I
haven't yet found a packaged solution and I'm wondering what others do to
configure this kind of thing.

Apparently the new modules are available in many appliance router products
(eg. OpenWrt and Streamboost).

Question on CentoS 7.4 on nvidia

I installed the elrepo kmod-nvidia and also the nvidia-detect and modules
(see below).

I had X working with the 3.10 from Centos - but video was freezing. SO I
thought I would try the elrepo kernel. I installed that and X does not come
up?

How do I re-make the nvidia module for 4.14.5 kernel? I want to make sure
the kmod kernel did it.

Some problemas working with network namespaces

Hi all,

I am trying to virtually connect two bridges on different network namespaces inside a CentOS KVM host.

Accessing crashed disk

Hi

I have a Centos server that crashed, it would no longer boot. I thought it was the disk with the OS that was the problem so I bought a new one and did a fresh install and now the computer is again up and running. But I'm having problems with accessing the old failed disk. I can see it with gnome-disk-utility and it says that the disk is OK but has 8 bad sectors. I can mount the boot partition from it and I can decrypt the main partition. But then I can see no way to mount the main partition. It is a LVM physical volume.

Centos 6 Samba 4 specific question

I am setting up a Samba 4 installation on CentOS 6.9. I have installed
the samba4, samba4-common, and samba4-libs with all of the dependencies
using YUM which appear to be all of the samba4 packages which are
available.

In the /usr/bin directory I can find smbcontrol and smbstatus but the
smbpasswd command is missing. Checking on a current CentOS 7 all three
of these commands are found.

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