Linux命令(92)之passwd
linux命令之passwd
1.passwd介绍
linux命令passwd是用来设置/更改用户密码
2.passwd用法
passwd [参数] username
| 参数 | 说明 |
| --stdin | 非交互式密码设置 |
| -l | 停止用户使用 |
| -u | 启用停止的用户 |
| -d | 删除密码 |
[root@centos79-3 ~]# passwd ztj
Changing password for user ztj.
New password:
BAD PASSWORD: The password is shorter than 8 characters
Retype new password:
passwd: all authentication tokens updated successfully.
[root@centos79-3 ~]#
3.实例
3.1.交互式密码设置
命令：
passwd ztj
3.2.非交互式密码设置
命令：
echo "ztj" | passwd --stdin ztj
[root@centos79-3 ~]# echo "ztj" | passwd --stdin ztj
Changing password for user ztj.
passwd: all authentication tokens updated successfully.
[root@centos79-3 ~]#
3.3.停止用户使用
命令：
passwd -l ztj
[root@centos79-3 ~]# passwd -l ztj
Locking password for user ztj.
passwd: Success
[root@centos79-3 ~]# cat /etc/shadow | grep ztj
ztj:!!$6$wwjVQCW8$m2NKGYHU8lVDiQKFqUp0YPQ5j4wYsSLE1WFIp2Oi/fXyvdPf5csIQYYh.nEUwSqhnNY2JAc7w1l/p579RaUpR/:19626:0:99999:7:::
[root@centos79-3 ~]# 3.4.启用停止的用户
命令：
passwd -u ztj
[root@centos79-3 ~]# passwd -u ztj
Unlocking password for user ztj.
passwd: Success
[root@centos79-3 ~]# cat /etc/shadow | grep ztj
ztj:$6$wwjVQCW8$m2NKGYHU8lVDiQKFqUp0YPQ5j4wYsSLE1WFIp2Oi/fXyvdPf5csIQYYh.nEUwSqhnNY2JAc7w1l/p579RaUpR/:19626:0:99999:7:::
[root@centos79-3 ~]#
3.5.删除用户密码
命令：
passwd -d ztj
[root@centos79-3 ~]# passwd -d ztj
Removing password for user ztj.
passwd: Success
[root@centos79-3 ~]# cat /etc/shadow | grep ztj
ztj::19626:0:99999:7:::
[root@centos79-3 ~]#
3.6.查看passwd帮助
命令：
passwd --help
OR
man passwd
[root@centos79-3 ~]# passwd --help
Usage: passwd [OPTION...] <accountName>-k, --keep-tokens keep non-expired authentication tokens-d, --delete delete the password for the named account (root only)-l, --lock lock the password for the named account (root only)-u, --unlock unlock the password for the named account (root only)-e, --expire expire the password for the named account (root only)-f, --force force operation-x, --maximum=DAYS maximum password lifetime (root only)-n, --minimum=DAYS minimum password lifetime (root only)-w, --warning=DAYS number of days warning users receives before passwordexpiration (root only)-i, --inactive=DAYS number of days after password expiration when an accountbecomes disabled (root only)-S, --status report password status on the named account (root only)--stdin read new tokens from stdin (root only)Help options:-?, --help Show this help message--usage Display brief usage message
[root@centos79-3 ~]#