It can happen that you’re getting that message when trying to connect to your linux server:
You are required to change your password immediately (password aged) WARNING: Your password has expired. You must change your password now and login again! Changing password for user mylinuxuser. (current) UNIX password:
The message is quite explicit and you need to update your password right now.
If you don’t want to update your password too many times, you can update the frequency of the expiration to 90 days for example:
chage -M 90 mylinuxuser
Or you can completely disable the expiration by pushing the max value for expiration date to 99999 days:
chage -m 0 -M 99999 -I -1 -E -1 mylinuxuser