Useful Commands/Service Management

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systemctl

Purpose Command
List
systemctl -t service
systemctl list-units -t service
Setup
sudo systemctl enable llama-swap
sudo systemctl disable llama-swap

sudo rm -f /etc/systemd/system/llama-swap.service
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