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Issue with "ExecStartPost" attribute in systemd daemon faile
by Gestió Servidors 22 Nov '19

22 Nov '19

Hello, I'm trying to configure a daemon (I'm doing tests with "crond" daemon) to send me an email after daemon restart. My "crond.service" file is: # /etc/systemd/system/crond.service [Unit] Description=Command Scheduler After=auditd.service systemd-user-sessions.service time-sync.target #OnFailure=crond-notify-email(a)%i.service [Service] EnvironmentFile=/etc/sysconfig/crond ExecStart=/usr/sbin/crond -n $CRONDARGS ExecReload=/bin/kill -HUP $MAINPID KillMode=process Restart=on-failure RestartSec=10s ExecStartPost=/bin/sh -c "/etc/systemd/system/test.sh" [Install] WantedBy=multi-user.target My "test.sh" is very simple: #!/bin/sh echo "CROND is restarting" | /usr/bin/mailx -s "crond failure notification" myemailaddress@mydomain As you can see, I have added lines "Restart=on-failure", "RestartSec=10s" and " ExecStartPost=/bin/sh -c "/etc/systemd/system/test.sh"" to the original crond.service daemon file. Then, I run "systemctl daemon-reconfigure" and, from one console, I run "kill -9 `pidof cron`" for restarting crond daemon. After it, I receive an email... But now, if I run again ""kill -9 `pidof cron`", I don't receive any mail... I have notice that if I run "systemctl daemon-reload" and then kill crond process, mail is sent perfectly... but if I don't run "systemctl daemon-reload", mail is sent ONLY first time... Why? Thanks.

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Is there an sshguard script for logwatch?
by Adrian van Bloois 22 Nov '19

22 Nov '19

Hi all, I wonder if there is a script to analyze logfiles for llogwatch and sshguard? Anyone knows? Adrian -- Adri P. van Bloois "Elegance is not a dispensable luxury but a factor that decides between success and failure." Edsger W. Dijkstra

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can't login as subsequent FreeIPA users
by Carson Chittom 21 Nov '19

21 Nov '19

When I set up a machine with CentOS 8, I used the "Enterprise Login" in the initial setup wizard to authenticate against my FreeIPA server. This worked fine, and I have no issues logging in with that initial user. However, I am unable to use GDM or the console to login as any *other* valid user from FreeIPA. From GDM I get something like "Sorry, that didn't work" and "Permission denied" on the console. I've verified that the credentials are correct, and that I am able to manually get a ticket via kinit for one of those other users from this machine. With CentOS 7, I didn't have to do any additional configuration in this regard after the initial wizard. Not sure whether this is a CentOS configuration issue or a FreeIPA one, but I figured I'd start here. I'm also not terribly familiar with FreeIPA, so I could be missing something obvious; but this worked without issue when the machine in question ran CentOS 7. Can somebody point me in the right direction?

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C8 and NetworkManager problem
by Alessandro Baggi 21 Nov '19

21 Nov '19

Hi list, I've installed C8 on my workstation. I configured my network devices (two bridges, two nics) using nmcli. Now that NM is the default I tried it. On C7 I always disabled it. I noticed some problem: 1) During the boot, also if NetworkManager-wait-online.service status is OK, I noticed that opening a terminal and ping some address it needs some time to perform ping and any operation on a network connection. So seems that in the first 30sec/1min there isn't an available network connection. After this time if I run a ping or whatever network is available. 2) Due to the problem 1, It cannot mount samba shares on boot saying "Not suitable address found". After the network is available I can mount samba shares. 3) I noticed that with NetworkManager a bridge must have an address. If I don't specify an address for the bridge, NM will try to assign some address, enable the connection forever (reporting errors in messages and on notification bar). 4) NetworkManager-wait-online slow down boot time and network availability. To solve this problem I installed network-scripts and disabled NetworkManager but I don't understand why NetworkManager need so much time to enable a connection. Can someone point me in the right direction? Thanks in advance.

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qemu-kvm
by Jerry Geis 21 Nov '19

21 Nov '19

I am running this command /usr/libexec/qemu-kvm -no-acpi -smp 4 -m 2048 -drive file=myimg.img,format=raw -vga std -device rtl8139 and expecting a window to open up for the console. It does not. This is on CentOS 8. Do I have something missing/not installed - or something wrong on the command line. Jerry

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CentOS7 sometimes don't detect NIC after reboot
by Miroslav Geisselreiter 20 Nov '19

20 Nov '19

I have brand new PC with this components: CPU Intel® Pentium G5400, LGA1151 motherboard ASUS PRIME B360M-C 16 GB RAM HDD 2x ADATA SSD 256GB XPG GAMMIX S11, PCIe Gen3x4 M.2 2280 (RAID1) NIC Intel X550-T1 Ethernet Converged Network Adapter I installed CentOS 7 and two NICs were detected: eno1 (on motherboard) enp1s0 (Intel X550-T1) When I restart the machine sometimes enp1s0 is missing. It is not detected during boot. It looks like NIC card is not installed / not present. After next reboot everything is fine and I do not see any problems with NIC card. How can I avoid this problem with missing NIC? Can you help me, please? Miroslav Geisselreiter

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Mirroring two screens for all users?
by James Pearson 20 Nov '19

20 Nov '19

We would like to have one workstation (CentOS7 with Gnome3) set up that has mirrored/cloned screens for all users that may login The workstation is using an Nvidia (proprietary) driver for the graphics card. We have set up xorg to use cloned screens, but gdm/Gnome3 appears to ignore these setting and only use what is set in ~/.config/monitors.xml We've set up /var/lib/gdm/.config/monitors.xml with mirrored/cloned settings for the login screen, but when a user logs in, the display switches to spanning both screens Is there any way we can force all user logins to use cloned displays on this one workstation (but not affect any settings they may use on other workstations - all users has NFS mounted home directories) ? Thanks James Pearson

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Virtualizing on CentOS 8
by Jerry Geis 20 Nov '19

20 Nov '19

I am trying to get going with CentOS 8. In the past I would run qemu-system-x86_64 -hda myfile.img get a console and off we go. I dont with to use virt-manager and the gui and all - I just wish to have a similar command line to boot up and run my img. Is there something like that I'm not finding ? I have found virsh - but I dont see how to make it run with an image file from the command line. Perhaps I'm missing something. Thanks, Jerry

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CentOS 8 boot command line
by Jerry Geis 19 Nov '19

19 Nov '19

I am trying to boot a grub entry for CentOS 8 menuentry "Server Install CentOS 8" { linux /boot/vmlinuz noverifyssl ks= https://devgeis.LayeredSolutionsInc.com:443/kickstart/ks_update_to_server8.… biosdevname=0 net.ifnames=0 ksdevice=eth0 ip=192.168.1.13 gateway=192.168.1.1 netmask=255.255.255. 0 nameserver=192.168.1.1 inst.sshd sshd=1 initrd /boot/initrd.img } When booting it says that "ip=192.168.1.3" Sorry unknown value. This works on CentOS 7. How do I specify the IP/SN/GW for CentOS kernel line? Thanks, Jerry

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Post-installation setup script for CentOS 7 servers
by Nicolas Kovacs 19 Nov '19

19 Nov '19

Hi, I just sanded down the remaining edges of my CentOS 7 post-install configuration script and published it on a Github repository, along with some detailed instructions. * https://github.com/kikinovak/centos-setup Feel free to use it (and/or adapt it to your needs). Cheers from the sunny South of France, Niki -- Microlinux - Solutions informatiques durables 7, place de l'église - 30730 Montpezat Site : https://www.microlinux.fr Mail : info(a)microlinux.fr Tél. : 04 66 63 10 32 Mob. : 06 51 80 12 12

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