Journal

systemd has its own logging system called the journal; running a separate logging daemon is not required. To read the log, use journalctl(1).

• archlinux Wiki
• opensuse man

help:

journalctl -h --help

检索 pacman 相关日志

journalctl --grep=pacman

Show only the most recent journal entries, and continuously print new entries as they are appended to the journal.
显示最新日志，并连续输出

journalctl -f --follow

Reverse output so that the newest entries are displayed first
反转输出 以便先显示最新的日志

journalctl -r --reverse

Show all kernel logs from previous boot
显示上次启动的所有内核日志

journalctl -k -b -1

Show a live log display from a system service kubelet.service
实时显示 kubelet 日志

journalctl -f -u kubelet

查看 kubelet 日志

journalctl _SYSTEMD_UNIT=kubelet.service

查看进程号 28097 日志

journalctl _PID=28097

查看进程号 28097 的 kubelet服务的日志 交集

journalctl _SYSTEMD_UNIT=kubelet.service _PID=28097