-1设置为和的“密码更改之间的最短天数”有什么区别吗0？
或者也许两个逗号都执行相同的策略？
chage -m -1 user
chage -m 0 user
谢谢您的任何提示，我找不到 chage 手册中描述的 -1 但可以将其设置为-1
Minimum number of days between password change : -1
答案1
如果你看一下源代码，chage有一条评论解释了它的-1作用：
/*
* new_fields - change the user's password aging information interactively.
*
* prompt the user for all of the password age values. set the fields
* from the user's response, or leave alone if nothing was entered. The
* value (-1) is used to indicate the field should be removed if possible.
* any other negative value is an error. very large positive values will
* be handled elsewhere.
*/
因此，当您指定时，chage -m -1 <user>它会禁用 minddays 字段。因此，在限制用户更改密码的频率时，使用 a 禁用它与-1将其设置为 0 似乎具有相同的效果。