TecAdmin published a quick tutorial showing you how to force users to change their password at the next login.
How to Force User to Change Password at Next Login in Linux
All the Linux systems keeps the users information in /etc/passwd and /etc/shadow files. User password and account aging details are stored in the shadow file. The aging information contains the details of the password change and account status. In this tutorial, you will learn about forcing a user to change their password in Linux.
