To add a new Command, follow this tutorial.
Go to the
/commands menu on your InstaWP dashboard.
You may need to click on the "::" menu on the navigation and "star" the Commands menu in order to view it.
Then, click on "Add Command"
Click on Add. Next, you need to enter the exact commands you want to execute on a Site. You can try with this
wp plugin install wp-file-manager --activate
Click on Save.
Updated 25 days ago