Linux中chage命令的语法是什么

linux chage命令简介：

chage命令用于密码实效管理，该是用来修改帐号和密码的有效期限。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

[root@db-server ~]#man chage
[root@db-server ~]# info chage
[root@db-server ~]# 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

[root@db-server ~]# 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
[root@db-server ~]#

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。

[root@db-server ~]# chage -m 60 -m 7 -w 7 mysql
you have new mail in /var/spool/mail/root
[root@db-server ~]# 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
[root@db-server ~]#
clip_image001

4：强制新建用户第一次登陆时修改密码

[root@db-server home]# useradd test
[root@db-server home]# passwd test
changing password for user test.
new unix password:
retype new unix password:
passwd: all authentication tokens updated successfully.
[root@db-server home]# chage -d 0 test
you have new mail in /var/spool/mail/root
[root@db-server 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

下面给大家介绍linux chage命令

功能：修改帐号和密码的有效期限

用法：chage[-l][-m mindays][-m maxdays][-i inactive][-e expiredate][-w warndays][-d lastdays]username

参数：

-l：列出用户的以及密码的有效期限
-m:修改密码的最小天数
-m：修改密码的最大天数
-i：密码过期后，锁定帐号的天数
-d：指定密码最后修改的日期
-e：有效期，0表示立即过期，-1表示永不过期
-w：密码过期前，开始警告天数

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