What is the minimum system-defined user class required to issue clear commands in Junos?

To issue clear commands in Junos, the user must belong to the admin user class. This class has full access to the system and allows users to perform all administrative tasks, including executing clear commands, which are essential for resetting certain functionalities or clearing specific states of the device. The admin class encompasses comprehensive privileges, including the ability to manage configurations, monitor system performance, and conduct troubleshooting through various commands, such as clear command.

The other user classes, while having distinct privileges, do not grant sufficient permissions for executing clear commands. The read-only class provides minimal access, allowing only monitoring capabilities without any command execution permissions. The operator class offers a step up from read-only but still lacks the full range of privileges found in the admin class. Lastly, the super-user designation is typically associated with system controls at an even higher level but may not be a defined user class within the typical operational roles in Junos for executing clear commands.

Thus, recognizing that the admin class is specifically required for executing clear commands is critical for effective system management.