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How to prevent a user from login in Linux

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How to prevent a user from login in Linux

Introduction

In this article, you will learn how to prevent a user from login in Linux.

The rights that are associated with an account (also known as permissions, user groups, bits, or flags) determine the level of access that a user has to a resource. Access levelling can be either automatic or requested, depending on the situation.

First, using the useradd command, we will create four users and set their passwords using the passwd command.

# useradd microhost1
passwd microhost1
command output

Then we do the same things for the next three users, that is, microhost2, microhost3, and microhost4.

We see the users' list from the below command.

# cat /etc/passwd
command output

If you want to prevent a user from logging in, then you should change the path to /bin/bash to /sbin/nologin

To change the path, use the below command.

# vi /etc/passwd
command output

To save the file,press escape colon wq.

Then try to login as a microhost1 user and you will see "This account is currently not available".

command output

If you want to login as a microhost1 user, then you would change the path /sbin/nolgin to /bin/bash.

# vi /etc/passwd
command output

Then try to login as a microhost1 user.

# su - microhost1
command output

Conclusion

Hopefully, you have learned how to prevent a user from login in Linux.

Also read: How to Install Varnish Cache with Apache on CentOS 7

Thank You 🙂

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