youtube https://youtu.be/UHBqSCaPZF8

1. commit
● Configuration command
● Activate and save current configuration
● Junos can automatically save the last 50
active configurations
○ The current active and the last 3 configurations are
stored uder /config
○ The remaining 46 configurations are stored under
/var/db/config

2. commit and-quit Move to operational mode after commit
commit check Check the validity of configurations
commit comment Add comments
● show system commit: Confirm the comments
commit at Set time to commit
● Time format is yyyy-mm-dd hh:mm:ss
● show system uptime: show the current time
● clear system commit: cancellation
commit confirmed Roll back the previous configuration
automatically