How to Lock and Unlock User account in Linux Easily

Shan August 07, 2016
This post will show you How to Lock and Unlock User account in Linux Easily.


How to Lock and Unlock User account in Linux Easily


In this post, we will show you how to lock and unlock user account in Linux. Before locking or unlocking the users, we should know how to check the status of the users.

How to lock users in Linux?

Option 1: Use the command "passwd -l username".
[root@localhost ~]# passwd -l username
Locking password for user username.
passwd: Success

Option 2: Use the command "usermod -l username".
[root@localhost ~]# usermod -l username

How to unlock users in Linux?

Option 1: Use the command "passwd -u username".
[root@localhost ~]# passwd -u username
Unlocking password for user username.
passwd: Success

Option 2: Use the command "usermod -U username".
[root@localhost ~]# usermod -U username

How to check the status of the users is locked or not?

Find the user in the /etc/shadow file for exclamation(!) sign after the username.

If the user is locked using "passwd -l username" command, we could see a single exclamation as below.
[root@localhost ~]# grep username /etc/shadow
username:!$6$pmQO0ZPH$CodOZ5xfPHmgdR8czIFFL07wPipBpczjeXz5wapGUNj1NLsnrlCEzxOyk6/oL.WIFSoCCppwbCi7bQ//HJAn8.:16052:0:99999:7:::

If the user is locked using the "usermod -l username", then we could see double exclamation as below.
root@localhost ~]# grep username /etc/shadow
username:!$6$pmQO0ZPH$CodOZ5xfPHmgdR8czIFFL07wPipBpczjeXz5wapGUNj1NLsnrlCEzxOyk6/oL.WIFSoCCppwbCi7bQ//HJAn8.:16052:0:99999:7:::

Hope this post helped you to know How to Lock and Unlock User account in Linux Easily.

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