設定已存在帳號密碼過期狀態

1. 設定帳號 deyu11 密碼20天後必須變更。

   [root@kvm8 ~]# chage -M 20 deyu11
   [root@kvm8 ~]# chage -l deyu11
   Last password change					: Dec 17, 2021
   Password expires					: Jan 06, 2022
   Password inactive					: never
   Account expires						: never
   Minimum number of days between password change		: 0
   Maximum number of days between password change		: 20
   Number of days of warning before password expires	: 7
   

2. 設定帳號 deyu11 密碼5天內不能變更。

   [root@kvm8 ~]# chage -m 5 deyu11
   [root@kvm8 ~]# chage -l deyu11
   Last password change					: Dec 17, 2021
   Password expires					: Jan 06, 2022
   Password inactive					: never
   Account expires						: never
   Minimum number of days between password change		: 5
   Maximum number of days between password change		: 20
   Number of days of warning before password expires	: 7
   

3. 設定帳號 deyu11 密碼過期前6天警告。

   [root@kvm8 ~]# chage -W 6 deyu11
   [root@kvm8 ~]# chage -l deyu11
   Last password change					: Dec 17, 2021
   Password expires					: Jan 06, 2022
   Password inactive					: never
   Account expires						: never
   Minimum number of days between password change		: 5
   Maximum number of days between password change		: 20
   Number of days of warning before password expires	: 6