To  check   user account is lock or not:-

First create user account by using following command:-

Useradd username

Passwd  “password”

Example:-

 [root@linuxnotes~]# useradd swapnil

[root@linuxnotes~]# passwd swapnil

 Changing password for user swapnil.

 New password:*******

 BAD PASSWORD: it is based on a dictionary word

 BAD PASSWORD: is too simple

 Retype new password:********

 passwd: all authentication tokens updated successfully.

 [root@linuxnotes~]#

 Command to lock user account :-

[root@linuxnotes~]# passwd -l swapnil

Locking password for user swapnil.

passwd: Success

To test useraccount is lock or not :-

login as: swapnil

swapnil@linuxnotes.co.in password:

Access denied

swapnil@linuxnotes.co.in password:

To unlock the useraccount:-

[root@linuxnotes~]# passwd -u swapnil

Unlocking password for user swapnil.

passwd: Success

[root@linuxnotes~]#

**Note:- Any type of changes in linux you should login by useraccount root.

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