How to ensure a Ubuntu 16 systemd unit waits for ntpd to sync before starting?
97635
Systemd dependencies and boot order
104178
Unable to synchronize time using NTP
5216
What is the most CPU efficient way to ensure that NumLock is on?
92960
How do I setup user autostart and properly configure systemd user services?
150456
Writing basic systemd service files
7883
How do I run a single command at startup using systemd?
102546
How to force a clock update using ntp?
35739
Conditionally enabling systemd files through Debian packaging
26854
Slow boot issue due to plymouth-quit-wait.service + ubuntu 18.04
105472
Why doesn't systemctl\ {restart,status}\ sshd\; work?
755
What should I do to force the root filesystem check (and optionally a fix) at boot?
63868
How to disable X server autostart in Debian Jessie?
52552
Systemd is really slow in comparison to upstart
114175
How do I test if another installation is already in progress?
119559
How do I setup a local NTP server?
116909
Debian 10 systemd, how to disable autostart of graphical environments
153657
TIME_WAIT in netstat of Apache processes