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：