passwd命令

passwd命令用于修改用户密码、过期时间、认证信息等；

[root@snow ~]# passwd 
[root@snow ~]# passwd zc
[root@snow ~]# passwd -l snow     锁定
Locking password for user snow.
passwd: Success
[root@snow ~]# passwd -S snow    查看是否锁定 
snow LK 2017-03-01 0 99999 7 -1 (Password locked.)
[root@snow ~]# passwd -u snow     解锁
Unlocking password for user snow.
passwd: Success
[root@snow ~]# passwd -S snow
snow PS 2017-03-01 0 99999 7 -1 (Password set, SHA512 crypt.)