How to use passwd

Passwd (option) (parameter)

Options-

-d: delete the password and only the system administrator can use it

-f: enforcement

-k: the setting can only be updated after the password expires.

-l: lock the password

-s: lists the information about the password, which can only be used by the system administrator

-u: unlock the locked account

A tool for automatically generating passwords: mkpasswd

The default command does not exist to install the package

Yum install-y expect

View mkpasswd parameter settings

Command parameters:

-l # (length definition of password, default is 9)

-d # (number of numbers, default is 2)

-c # (number of lowercase characters, default is 2)

-C # (number of uppercase characters, default is 2)

-s # (number of special characters, default is 1)

-v (details.)

-p prog (program sets password, default is passwd)

Example 1: generate a 12-bit password

Mkpasswd-l 12

Example 2: generate a 12-digit password with 5 digits without a string

Mkpasswd-l 12-d 5-s 0

Example 3: how to set a password for a user in a script

Passwd-stdin lizheng