What Is Password Aging in Linux?

Password aging is a mechanism that allows the system to enforce a certain lifetime for passwords. While this may be moderately inconvenient for users, it ensures that passwords are changed occasionally, which is a good security practice.

What is password aging?

Password aging requires users to change their password if the password has existed on the system for a defined time period. Password aging includes a minimum age and a maximum age time period. A password cannot be changed before the passage of this minimum age time period.

How do I know my Linux password is aging?

Linux check user password expiration using chage

1. Open the terminal application.
2. Type chage -l userName command to display password expiration information for Linux user account.
3. The -l option passed to the change show account aging information.
4. Check tom user’s password expiry time, run: sudo chage -l tom.