Linux 如何鎖定/ 解鎖root account

Ref:

http://www.golinuxhub.com/2014/08/how-to-check-lock-status-of-any-user.html

 To lock the password

# passwd -l user1

Locking password for user user1.

passwd: Success

To unlock the password

# passwd -u user1

Unlocking password for user user1.

passwd: Success