# passwd user2 //修改用户user2的密码
New password: //新密码
BAD PASSWORD: it is too simplistic/systematic
BAD PASSWORD: is too simple
Retype new password: //重新输入新密码
passwd: all authentication tokens updated successfully. //所有身份验证令牌已更新
#yum install –y expect
#mkpasswd //随机生成密码
HxUT8ou%8
#mkpasswd –l 12 –s 0 –d 3 –c 4 //-l指定生成12位随机数,-s指定特殊字符个数0个,-d指定数字个数3个,-c小写字母4个,-C大写。
#passwd –stdin user2 //明文修改user2用户密码,一次成功
转载于:https://my.oschina.net/vpirate/blog/550783