What is the purpose of the journalctl command in Linux?

The journalctl command is used to view and manage system logs. It can read and filter systemd logs, providing a simple way to check system events, service status, error messages, and other log entries. The journalctl command supports various filtering options, allowing logs to be filtered based on time range, service name, log level, and more. Additionally, it can output logs in specific formats and offer useful features such as real-time log monitoring and tracking logs of specific units. In conclusion, journalctl is a very useful log tool in the Linux system.