tail -fと同等のことがjournalctl -fでもできるのはうれしい
$ cheat journalctl # Actively follow log (like tail -f) journalctl -f # Display all errors since last boot journalctl -b -p err # Filter by time period journalctl --since=2012-10-15 --until="2011-10-16 23:59:59" # Show list of systemd units logged in journal journalctl -F _SYSTEMD_UNIT # Filter by specific unit journalctl -u dbus # Filter by executable name journalctl /usr/bin/dbus-daemon # Filter by PID journalctl _PID=123 # Filter by Command, e.g., sshd journalctl _COMM=sshd # Filter by Command and time period journalctl _COMM=crond --since '10:00' --until '11:00' # List all available boots journalctl --list-boots # Filter by specific User ID e.g., user id 1000 journalctl _UID=1000
