原文
chage命令用於密碼實效管理，該是用來修改帳號和密碼的有效期限，接下來通過本文給大家介紹Linux chage命令相關知識，本文介紹的非常詳細，具有參考借鑒價值，感興趣的朋友一起學習吧
linux chage命令簡介：
chage用於密碼實效管理，該是用來修改帳號和密碼的有效期限它可以修改賬號和密碼的有效期對於CHAGE命令的描述如下所示。：
chage命令更改密碼更改與上次密碼更改日期之間的天數。系統使用此信息來確定用戶何時必須更改其密碼
命令語法：
chage [options] 用戶
命令參數：
| 參數 | 描述 |
| -d | 指定密碼最后修改日期 |
| -E | 密碼到期的日期，過了這天，此賬號將不可用，0表示馬上過期，-1表示永不過期 |
| -h | 顯示幫助信息並退出 |
| -I | 密碼過期后，鎖定賬號的天數 |
| -l | 列出用戶及密碼的有效期 |
| -m | 密碼可更改的最小天數。為零代表任何時候都可以更改密碼 |
| -M | 密碼保持有效的最大天數 |
| -W | 密碼過期前，提前收到警告信息的天數 |
使用示例：
1: 查看chage命令的幫助信息
[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用戶以及密碼的有效期
[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 exp
1: 查看chage命令的幫助信息
[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用戶以及密碼的有效期
[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 exp