UBTU-16-010220 - Passwords for new users must have a 60-day maximum password lifetime restriction.
Any password, no matter how complex, can eventually be cracked. Therefore, passwords need to be changed periodically. If the Ubuntu operating system does not limit the lifetime of passwords and force users to change their passwords, there is the risk that the Ubuntu operating system passwords could be compromised.
Configure the Ubuntu operating system to enforce a 60-day maximum password lifetime. Add, or modify the following line in the '/etc/login.defs' file: PASS_MAX_DAYS 60