Useful Commands/Service Management

systemctl

Purpose	Command
List	systemctl -t service systemctl list-units -t service
Setup	sudo systemctl disable llama-swap sudo rm -f /etc/systemd/system/llama-swap.service sudo systemctl daemon-reload sudo ln -s /home/xxx/yyy/llama-swap.service llama.service sudo systemctl enable llama-swap sudo systemctl daemon-reload
Monitor	systemctl status llama-swap systemctl status llama-swap.service
Control	systemctl start nginx systemctl stop nginx systemctl reload nginx systemctl reload systemd-networkd

Run Level

Run Level	Description
0	halt
1	single user mode
2	Multi-user, without NFS
3	Full multi-user mode
4	unused
5	X11
6	reboot