/etc/systemd/system.confsudo vim /etc/systemd/system.conf
#DefaultTimeoutStartSec=90s
#DefaultTimeoutStopSec=90s
DefaultTimeoutStartSec=10s
DefaultTimeoutStopSec=10s
sudo systemctl daemon-reload
Ubuntu18关机时出现 A stop job is running for ...导致关机很慢
原文：https://www.cnblogs.com/convict/p/14876525.html