The /etc/shadow file contains following fields.Login-id : Which indicates the username of that perticular user.Passwd : It Contains encrypted password.Lastchg : Indicates the number of days between 1-JAN-1970 and last password modification date.Min : Contains minimum no of days required between password changes.Max : Contains the maximum no of days the password is valid before the user's prompted to enter a password at login.Warn : Contains the number of days the user is warn before the password expires.Inactive : Contains the number of inactive days allowed for that user before the user's account is locked. Expire : contains the date when the user account expires once exceeded. The user can no longer log in also it will display the message "Your password has been expired".