CentOS8 CheatSheet fuer System Administratoren
Jump to navigation
Jump to search
1 SOS Report (Log Bundle)
This collects a log bundle which can be used for later debugging and analyzing.
Start this BEFORE you try to repair or change something, as well do not forget to snapshot/backup System/Application before debugging.
dnf -y install sos sosreport cp -av /var/tmp/sosreport* /root/
2 Events
2.1 Journal
- Follow all journal logs
journalctl -af
- Follow all journal logs with severity error or higher
journalctl --priority err --catalog --boot --follow
2.2 Log Files
- tail all currently open text files
lsof -F | sed '/^n\//!d;s/^n//;s/ .*//' | sort -u | xargs file | grep ' text$' | cut -d: -f1 | xargs tail -fn0
- tail all files under /var/log
tail -f -n0 /var/log/* /var/log/*/*
3 CentOS 8 Stream migration
CentOS8 will be discontinued by the Red Hat team. All the effort will go into CentOS Stream operating System which is a rolling release of CentOS.
You can directly migrate a CentOS8 into a CentOS8 Stream in place:
dnf install centos-release-stream dnf distro-sync cat /etc/centos-release reboot