systemd loads up Linux faster than its the older sysvinit.
It manages Linux services
Use this to see the boot services
systemd-analyze
You can even put it into a graphic
systemd-analyze plot > SystemBoot.svg
Check the state of a service:
systemctl --state bluetooth
List the services:
systemctl -t service
Start and stop a service
systemctl start ssh
systemctl stop ssh
N.B. don't need the ".service" suffix
Check the status of a service
systemctl status ssh.service
Control groups set limits on the system resources of services
An attacker trying to run crypto-mining software on your server might check and modify these limits
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