How do I create and modify user accounts to have a nologin shell?
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For security reasons, sometimes you would require that your users are not able to login to the server. The simple solution is to configure their accounts such that their login shell is set to /sbin/nologin. To modify an existing user, execute the command:
usermod -s /sbin/nologin <username >
For new users, you may use the command:
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