[root@WEB66 etc]# passwd
Changing password for user root.
New password:
BAD PASSWORD: it does not contain enough DIFFERENT characters   (相同字符)
BAD PASSWORD: is a palindrome
Retype new password:
Sorry, passwords do not match.   （两次密码不一致）

New password:
BAD PASSWORD: it is too simplistic/systematic  （密码太简单）
BAD PASSWORD: is too simple
Retype new password:
Sorry, passwords do not match. （两次密码不一致）

[root@WEB66 etc]# passwd loguser
Changing password for user loguser.
New password:
BAD PASSWORD: it does not contain enough DIFFERENT characters (相同字符)
BAD PASSWORD: is a palindrome
Retype new password:
passwd: all authentication tokens updated successfully. (修改成功)