Service Logs

Core Idea

Logs are the service telling you what happened.

Practice Alone

Break a safe unit file, read the journal error, fix it, and restart.

Done When

You read logs before changing the next line.

Go Deeper

• Logging explains logs beyond service-specific journal output.
• Service explains network services, systemd services, user services, and system services.
• Time zones explains timestamp confusion.
• journalctl is the command card for reading service logs.