JOURNALCTL Commands Cheat Sheet
Here is a cli commands cheat sheet for JOURNALCTL command, you can use this as a quick reminder for basic commands with a brief description for each of the commands.
What is JOURNALCTL command?
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# To actively follow log (like tail -f):
journalctl -f
# To display all errors since last boot:
journalctl -b -p err
# To filter by time period:
journalctl --since=2012-10-15 --until="2011-10-16 23:59:59"
# To show list of systemd units logged in journal:
journalctl -F _SYSTEMD_UNIT
# To filter by specific unit:
journalctl -u dbus
# To filter by executable name:
journalctl /usr/bin/dbus-daemon
# To filter by PID:
journalctl _PID=123
# To filter by Command, e.g., sshd:
journalctl _COMM=sshd
# To filter by Command and time period:
journalctl _COMM=crond --since '10:00' --until '11:00'
# To list all available boots:
journalctl --list-boots
# To filter by specific User ID e.g., user id 1000:
journalctl _UID=1000
# To filter by specific SYSLOG_INDENTIFIER:
journalctl -t systemd-resolved
Check out the JOURNALCTL command documentation .
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