Discuss January 2020

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72 discussions

Issues booting centos7 [dracut is failing to enable centos/root, centos/swap LVs]
by Yannis Milios 01 Feb '25

01 Feb '25

Hello, I'm having a strange problem booting a new centos7 installation. Below some background on this. [I have attached the tech details at the bottom of this message] I started a new CentOS7 installation on a VM, so far all good, o/s boots fine. Then I decided to increase VM disk size (initially was 10G) to 13G. Powered off the VM, increased the vhd via the hypervisor, booted from CentOS livecd, selected "recover my centos installation". Then I used the following sequence of commands to make the new vhd size "visible" to the o/s ... - ran fdisk /dev/sda and deleted partition 2. (This is the LVM partition where the o/s is stored. The first partition is /boot [xfs] partition *non lvm*.) - created a new partition with same starting sector as before deleting it, but a different ending sector (to reflect to the increased space). - set partition type to 8e (lvm), saved settings and exit. - ran pvresize and lvresize to make new space visible to the o/s.All good, I can see the space increase on 'lvdisplay centos/root'. - ran 'mount /dev/mapper/centos-root /mnt/root' to temporarily mount the o/s partition. - ran 'xfs_growfs /mnt/root' to resize the o/s fs to the new size. It was successful and I could actually chroot to the o/s and verify new disk size. - rebooted and tried to boot from hdd this time. Grub menu shows up and loads default kernel (3.10.0-862.9.1.el7.x86_64). - after initial kernel boot up process, booting continues to initrd and then it's where the problem starts... - looks like dracut has issues locating/enabling /dev/mapper/centos-root (lv) and as a result it cannot boot to the 'real' root fs (/). - while in dracut shell, I execute the following command sequence: 1. lvm lvchange -ay /dev/centos/root 2. lvm lvchange -ay /dev/centos/swap 3. ln -s /dev/mapper/centos-root /dev/root 4. exit ...and the o/s boots fine...so looks like the pv,vg,lv is detected properly while in initrd, but somehow dracut has difficulties enabling the root,swap LVs ? - While in o/s, I rebuild initrd by using: 'dracut -f -v -a lvm' Note, I have to use '-a lvm' as for some reason, if don't, the lvm utils (lvm,lvm_scan) are not being included to the initrd, not sure why this happens. After rebooting, same thing happens, I have to manually boot the system via dracut shell. I'm a bit stuck at this point, any clues what I'm doing wrong in here ? As I previously said, this is a new installation, so I could simply reinstall the whole thing, but I would rather try to find out some answer to why is this happening ... :-) [curiosity] Some additional details: ================== I've attached /run/initramfs/rdsosreport.txt file [generated while in inird] here: https://privatebin.net/?fdc4052c0c402884#gdB/QYR3IeR55SxUbjfrkZPQfJ7jMxiUxq… o/s ver=CentOS Linux release 7.5.1804 (Core) [root@localhost ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 13G 0 disk ├─sda1 8:1 0 500M 0 part /boot └─sda2 8:2 0 12.5G 0 part ├─centos-root 253:0 0 11.5G 0 lvm / └─centos-swap 253:1 0 1G 0 lvm [SWAP] [root@localhost ~]# cat /etc/default/grub GRUB_TIMEOUT=5 GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)" GRUB_DEFAULT=saved GRUB_DISABLE_SUBMENU=true GRUB_TERMINAL_OUTPUT="console" GRUB_CMDLINE_LINUX="rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rd.shell rhgb" GRUB_DISABLE_RECOVERY="true"

4 11

MATE 1.20 test build for CentOS 7 available
by Greg Bailey 14 Oct '21

14 Oct '21

Hi everyone, There's been discussions in the past about updating MATE RPMs in EPEL-7: https://bugzilla.redhat.com/show_bug.cgi?id=1436260 https://lists.centos.org/pipermail/centos/2019-August/173154.html (and lots of others...) As a proof-of-concept, I've written some scripts that clone specific commits from the Fedora master branches, and then runs a tool to re-apply RPM scriptlets that are required by EL7 but removed from the Fedora .spec files. The scripts are available at: https://github.com/gebailey/mate-rpms/tree/master/1.20/el7 There's also instructions there if you want to try upgrading to MATE 1.20 w/o rebuilding them yourself. If these packages work for others, perhaps we can revisit the idea of updating the epel7 branches of the Fedora git repos and submitting an official update. There's nothing here (yet) about building MATE 1.22 (which might require a newer gcc for EL7), or building anything on CentOS 8, but thought the CentOS 7 users might find this helpful. -Greg

6 17

Brother HL-L2360DW printing quality
by H 23 Jul '20

23 Jul '20

I have the above printer but have not been able to resolve issues with the printing quality in CentOS 7. The test page prints fine but when I print PDF-documents, most recently using Chinese fonts, it is lacking and the pages very hard to read. The settings in the Mate Cups configuration panel are fine and set to 600 dpi, the settings in the printer menu are all OK yet it prints more like maybe 150 or even 75 dpi. Any suggestion what might be wrong?

3 7

dbus/systemd failure on startup (CentOS 7.7)
by James Pearson 25 Feb '20

25 Feb '20

We are seeing a problem that occurs ~5% of the time when rebooting CentOS 7.7 where systemd gets a 'Connection timed out' to D-Bus just after the D-Bus service starts - from 'journalctl -x' : ... Jan 21 16:09:59 linux7-7.mpc.local systemd[1]: Started D-Bus System Message Bus. -- Subject: Unit dbus.service has finished start-up -- Defined-By: systemd -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- -- Unit dbus.service has finished starting up. -- -- The start-up result is done. Jan 21 16:10:24 linux7-7.mpc.local systemd[1]: Failed to register match for Disconnected message: Connection timed out Jan 21 16:10:24 linux7-7.mpc.local systemd[1]: Failed to initialize D-Bus connection: Connection timed out ... This then has a knock-on effect that causes other services to fail - e.g. -- Unit gdm.service has begun starting up. Jan 21 16:10:39 linux7-7.mpc.local dbus[817]: [system] Activating systemd to hand-off: service name='org.freedesktop.login1' unit='dbus-org.freedesktop.login1.service' Jan 21 16:10:50 linux7-7.mpc.local dbus[817]: [system] Failed to activate service 'org.freedesktop.systemd1': timed out Jan 21 16:10:50 linux7-7.mpc.local systemd-logind[1221]: Failed to enable subscription: Failed to activate service 'org.freedesktop.systemd1': timed out Jan 21 16:10:50 linux7-7.mpc.local systemd-logind[1221]: Failed to fully start up daemon: Connection timed out Jan 21 16:10:50 linux7-7.mpc.local systemd[1]: systemd-logind.service: main process exited, code=exited, status=1/FAILURE Jan 21 16:10:50 linux7-7.mpc.local systemd[1]: Failed to start Login Service. -- Subject: Unit systemd-logind.service has failed -- Defined-By: systemd -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- -- Unit systemd-logind.service has failed. -- -- The result is failed. Whatever the issue is, it appears that polkit might be involved - if we restart the polkit service, things appear to return to normal (e.g. gdm starts up etc) We can't find any similar reports of this happening elsewhere with CentOS 7.7 - but we were wondering if anyone else had come across a problem like this? Thanks James Pearson

3 6

Need info on adobe flash player plugin 32 for CentOS7
by Kay Schenk 19 Feb '20

19 Feb '20

Hello all-- I kept getting messages that my old Flash Player 31 was obsolete so I went in search of an update. I came across several references for getting flash plugin 32 that basically were the same as this page -- https://www.if-not-true-then-false.com/2010/install-adobe-flash-player-10-o… However, it seems the site -- |http://linuxdownload.adobe.com/ does NOT resolve. Does anyone have any insight into how to install Flash Player Plugin v 32 on CentOS 7? | -- "And in the end, only kindness matters." -- Jewel, "Hands" ______ MzK

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CentOS 7 kickstart repo directive
by isdtor 08 Feb '20

08 Feb '20

Is the kickstart repo directive broken under CentOS 7? Every attempt with a repo directive in the kickstart file fails during the software selection step. Removing the repo directives and the packages from those repos under %packages makes it work. On console 2, I have verified that the (NFS) repos specified in the kickstart file are mounted and that the repo metadata has been copied over to /tmp/yum.cache. One of the packages from one of the repos that is explicitly listed under the %packages section appears in packaging.log for dependency checking. The custom repos work fine with yum on a running machine, so there is no problem with the metadata. Logging is poor and does not log what is actually wrong.

2 2

UEFI on CentOS 8.1
by Jerry Geis 02 Feb '20

02 Feb '20

Are UEFI clients still not possible on 8.1 ? I was looking for a setup in the GUI and dont see it. Searching "suggests" that --boot-uefi may be a command line option - but again I see nothing on the GUI. Thanks Jerry

4 5

system-config-network centos altarch
by Richmond 31 Jan '20

31 Jan '20

Hi I have just installed centos 7 altarch on a 32 bit computer. I selected the minimal system install. I see that when I search with yum there is no command system-config-network, i.e. yum search system-config-network Does this command (system-config-network) still exist? Would I expect it to be in the repository even though I did a minimum install? Although I do not have X, I can run some X applications by using ssh -Y from another computer, although messing with the network settings could be tricky...

2 2

CentOS 8 on USB disk
by Jerry Geis 31 Jan '20

31 Jan '20

I did the dd if=CentOS-8.1.1911-x86_64-dvd1.iso of=/dev/sdd to a 16G USB disk then tried to use it on an install. The installer said invalid install media. Any way to verify if the "write" to disk was good ? I got no errors on the dd. I did re-download the iso and did a diff and there was no diff. So I think my iso is OK. Jerry

5 7

CentOS 8 lokkit
by Jerry Geis 31 Jan '20

31 Jan '20

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? Jerry

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Discuss January 2020