A quick reference for managing and troubleshooting services with systemctl and journalctl.

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Action	Command
Start a service	sudo systemctl start <service>.service
Stop a service	sudo systemctl stop <service>.service
Restart a service	sudo systemctl restart <service>.service
Reload service config	sudo systemctl reload <service>.service
Enable at boot	sudo systemctl enable <service>.service
Disable at boot	sudo systemctl disable <service>.service
Check service status	systemctl status <service>.service

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Action	Command
Show all loaded services	systemctl list-units --type=service
Show all services (incl. inactive)	systemctl list-units --type=service --all
Show enabled/disabled service files	systemctl list-unit-files --type=service
Show failed services	systemctl --failed

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Action	Command
Show logs for a service	journalctl -u <service>.service
Show last 50 log lines	journalctl -u <service>.service -n 50
Follow logs live	journalctl -u <service>.service -f
Logs since last boot	journalctl -u <service>.service -b
View recent logs with errors	journalctl -xe

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✅ Tip: You can tab-complete service names with <Tab> after typing part of the name with systemctl or journalctl.