Linux命令学习总结：chage

命令简介：

该命令用于密码时效管理。它可以修改账号和密码的有效期。对于chage命令的描述如下所示：

The chage command changes the number of days between password changes and the date of the last password change. This information is used by the system to determine when a user must change his/her password

命令语法：

chage [options] user

命令参数：

使用示例：

1: 查看chage命令的帮助信息

[[email protected] ~]#man chage

[[email protected] ~]# info chage

[[email protected] ~]# chage -h

Usage: chage [options] user

Options:

  -d, --lastday LAST_DAY        set last password change to LAST_DAY

  -E, --expiredate EXPIRE_DATE  set account expiration date to EXPIRE_DATE

  -h, --help                    display this help message and exit

  -I, --inactive INACTIVE       set password inactive after expiration

                                to INACTIVE

  -l, --list                    show account aging information

  -m, --mindays MIN_DAYS        set minimum number of days before password

                                change to MIN_DAYS

  -M, --maxdays MAX_DAYS        set maximim number of days before password

                                change to MAX_DAYS

  -W, --warndays WARN_DAYS      set expiration warning days to WARN_DAYS

2：查看mysql用户以及密码的有效期

[[email protected] ~]# chage -l mysql

Last password change                                    : Mar 26, 2015

Password expires                                        : never

Password inactive                                       : never

Account expires                                         : never

Minimum number of days between password change          : -1

Maximum number of days between password change          : -1

Number of days of warning before password expires       : -1

[[email protected] ~]# 

3：设置mysql用户60天后密码过期，至少7天后才能修改密码，密码过期前7天开始收到告警信息。

[[email protected] ~]# chage -M 60 -m 7 -W 7 mysql

You have new mail in /var/spool/mail/root

[[email protected]rver ~]# chage -l mysql

Last password change                                    : Mar 26, 2015

Password expires                                        : May 25, 2015

Password inactive                                       : never

Account expires                                         : never

Minimum number of days between password change          : 7

Maximum number of days between password change          : 60

Number of days of warning before password expires       : 7

[[email protected] ~]# 

4：强制新建用户第一次登陆时修改密码

[[email protected] home]# useradd test

[[email protected] home]# passwd test

Changing password for user test.

New UNIX password: 

Retype new UNIX password: 

passwd: all authentication tokens updated successfully.

[[email protected] home]# chage -d 0 test

You have new mail in /var/spool/mail/root

[[email protected] home]# chage -l test

Last password change                                    : password must be changed

Password expires                                        : never

Password inactive                                       : never

Account expires                                         : never

Minimum number of days between password change          : 0

Maximum number of days between password change          : 99999

Number of days of warning before password expires       : 7