System Monitoring

A log is like your computer’s diary. ​It records events that happen on your system.

• when your system shuts down, ​when it starts up, when a driver is loaded, when someone logs in
• Logs tell you the exact time that an event occurred. Who caused the event and more
•  ​Logging: The act of creating log events 
•  ​In most systems, there’s a service that runs in the background and ​constantly writes events to logs.