List all socket units systemd
All socket-activated units and their state
systemctl list-units --type=socket --all
more systemd
all 26 commands →
Mask a service
systemctl mask snapd.service
Show environment of service
systemctl show myapp.service -p Environment
Boot critical chain
systemd-analyze critical-chain <unit>
Boot timeline SVG
systemd-analyze plot > boot.svg
Drop-in override
systemctl edit <unit> # writes /etc/systemd/system/<unit>.d/override.conf