Junos CLI basic

The root user must start the CLI from the shell.

user@router>    (the > character identifies operational mode which is to monitor and troubleshoot the device)
user@router#    (the # character identifies configuration mode which is to configure all properties of the Junos OS)

Press Spacebar to complete a command. Press Tab to complete system commands and user-defined variables.

Use configure exclusive to exclude other users from editing the configuration.Any uncommitted changes are discarded when the user exits. In contrast, uncommitted changes are retained when you use standard configure command.

Use configure private to allow multiple users to edit the configuration while committing only their private changes. If a private users issue a rollback 0 command, the software discards only their changes.

Moving between levels is like changing directories. Use up, up 2, top, exit commands.

Viewing differences

Using show | compare displays differences between the candidate config and active configuration also known as rollback 0.

Remember- the rollback command modifies only the candidate configuration. To activate the changes loaded through the rollback operation, issue the commit command.

Run command

The run command allows you to execute operational mode commands while in configuration mode. It is similar to the do command.