1、使用passwd命令锁定与解锁账号     [root@rhel7 ~]# passwd -l testuser --- -l 锁定 Locking password for user testuser. passwd: Success [root@rhel7 ~]# passwd -S testuser --- 查看状态 testuser LK 2016-06-20 0 99999 7 -1 (Password locked.) [root@rhel7 ~]#  [root@rhel7 ~]# passwd -u testuser --- 解锁 Unlocking password for user testuser. passwd: Success [root@rhel7 ~]# passwd -S testuser testuser PS 2016-06-20 0 99999 7 -1 (Password set, SHA512 crypt.)   2、使用usermod命令锁定与解锁账号     [root@rhel7 ~]# usermod -L testuser [root@rhel7 ~]# passwd -S testuser testuser LK 2016-06-20 0 99999 7 -1 (Password locked.) [root@rhel7 ~]# usermod -U testuser [root@rhel7 ~]# passwd -S testuser testuser PS 2016-06-20 0 99999 7 -1 (Password set, SHA512 crypt.) [root@rhel7 ~]#