Linux更改用户密码

环境

RedHat Linux 9 + VWWare 7.1.2 + Putty 0.62

问题

Linux更改用户密码

解决

方法一

1.如果你是以普通用户登录的话，修改自己的密码，使用passwd命令。会让你先输入自己的旧密码，再输入两遍新密码。

[www.linuxidc.com@localhost root]$ passwd
Changing password for user wgb.
Changing password for wgb
(current) UNIX password:
New password:
Retype new password:
passwd: all authentication tokens updated successfully.
[www.linuxidc.com@localhost root]$

[www.linuxidc.com@localhost root]$ passwd wgb
passwd: Only root can specify a user name.

2.如果你是root用户登录的话，使用passwd root或者passwd，就可以修改root的密码。直接输入两遍新密码就可以了，不用输入旧密码。

[root@localhost root]# passwd
Changing password for user root.
New password:
BAD PASSWORD: it is too short
Retype new password:
passwd: all authentication tokens updated successfully.
[root@localhost root]#

[root@localhost root]# passwd root
Changing password for user root.
New password:
BAD PASSWORD: it is too short
Retype new password:
passwd: all authentication tokens updated successfully.
[root@localhost root]#

方法二
 
root用户登录，打开终端，执行 echo  "你想设置的密码"  |  passwd  --stdin  用户名

[root@localhost root]# echo "wgb" | passwd --stdin wgb
Changing password for user wgb.
passwd: all authentication tokens updated successfully.