systemd Service Management

Start service
sudo systemctl start nginx

Stop service
sudo systemctl stop nginx

Restart service
sudo systemctl restart nginx

Reload configuration
sudo systemctl reload nginx

Enable on boot
sudo systemctl enable nginx

Disable on boot
sudo systemctl disable nginx

Enable and start
sudo systemctl enable --now nginx

Check service status
systemctl status nginx

Check if active
systemctl is-active nginx

Check if enabled
systemctl is-enabled nginx

List all services
systemctl list-units --type=service

List running services
systemctl list-units --type=service --state=running

List failed services
systemctl list-units --type=service --state=failed

View service logs
journalctl -u nginx

Follow logs (tail -f)
journalctl -u nginx -f

Last 50 lines
journalctl -u nginx -n 50

Logs since today
journalctl -u nginx --since today

Logs between times
journalctl -u nginx --since "2024-01-01 10:00" --until "2024-01-01 12:00"

Clear journal logs
sudo journalctl --vacuum-time=7d // Keep 7 days
sudo journalctl --vacuum-size=1G // Keep 1GB

Reboot system
sudo systemctl reboot

Power off system
sudo systemctl poweroff

Suspend system
sudo systemctl suspend

Hibernate system
sudo systemctl hibernate

Reload systemd configuration
sudo systemctl daemon-reload

List all unit files
systemctl list-unit-files

Show service file
systemctl cat nginx