Which command is used to check the system logs in Junos?

The command used to check the system logs in Junos is "show log messages." This command displays the contents of the messages log, which is one of the key logs that contain information about system events, warnings, and errors. The messages logged include a wide variety of system activity, allowing network administrators to troubleshoot and monitor the device's health and performance.

Accessing the messages log is essential for diagnosing issues and understanding operational status, as it provides insights into activities such as configuration changes, security events, and hardware status. This log is verbose and includes timestamps, making it easier for administrators to correlate events and identify patterns or problems.

Other log files exist within Junos, such as the "show log router" for router-specific messages or logs for various services. However, "show log messages" serves as a catch-all command for essential system-level logging information, making it the primary command for checking system logs in a Junos environment.