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-stdin
This option is used to indicate that passwd should read the new password from
standard input, which can be a pipe.
这个选项用于从标准输入管道读入新的密码。
使用 echo 方式来重置Linux 系统用户密码:
echo “新密码”|passwd --stdin 用户名
[root@rhel7 ~]# passwd --stdin rusky 为rusky用户设置密码。 Changing
password for user rusky. zxcvbnm passwd: all authentication tokens updated
successfully. [root@rhel7 ~]# echo "qwert" qwert [root@rhel7 ~]# echo "qwert" |
passwd --stdin rusky 把echo返回的字符qwert设置为用户rusky的密码 Changing password for user
rusky. passwd: all authentication tokens updated successfully. [root@rhel7 ~]#
这种方式虽然简单,但是通过history命令可以查到用户的密码,所以不安全。