Display or change user password policy.
Disable password expiration for the user
sudo lchage --date -1 username
Display the password policy for the user
sudo lchage --list username
Require password change for the user a certain number of days after the last password change
sudo lchage --maxdays number_of_days username
Start warning the user a certain number of days before the password expires
sudo lchage --warndays number_of_days username