WP-CLI offers a command to enable, disable maintenance mode and check if maintenance mode is
enabled or not.
Step 1 – Check the status
$ wp maintenance-mode status
Maintenance mode is not active.
Step 2 – Enable maintenance mode
$ wp maintenance-mode activate
Enabling Maintenance mode...
Success: Activated Maintenance mode.
Step 3 – Disable maintenance mode
$ wp maintenance-mode deactivate
Disabling Maintenance mode...
Success: Deactivated Maintenance mode.