systemd

Really interesting reading https://en.wikipedia.org/wiki/Systemd


For instance, I didn't know that systemd has PID = 1

ps -ef | grep systemd
root 1 0 0 Dec16 ? 00:10:38 /usr/lib/systemd/systemd --switched-root --system --deserialize 2

and that other daemons like journald, logind and networkd (if running), have parent PID = 1

ps -ef | grep journald
root 499 1 0 Dec16 ? 00:02:41 /usr/lib/systemd/systemd-journald


ps -ef | grep logind
root 727 1 0 Dec16 ? 00:01:00 /usr/lib/systemd/systemd-logind