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	Submitted by: lvo
coolcommand /etc/nologin - stop all users from logging in except root
Description To stop users from logging in to your server, with the exception of root, create a file called /etc/nologin. Put whatever message you want in this file as it will be displayed to your users who attempt to login. Remove /etc/nologin when maintenance is complete.
Example /etc/nologin

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