password expiry for users is configuring in /etc/login.defs file.These are the password aging parameters PASS_MAX_DAYS                Maximum number of days a password may be used. PASS_MIN_DAYS                 Minimum number of days allowed between password changes. PASS_WARN_AGE               Number of days warning given before a password expires. By default PASS_MAX_DAYS will be 99999 days that means no password expiry.So [...]

Linux Commands for managing users: 1. adduser – Command used to add user accounts. 2. chage – Used to change the time the user’s password will expire. 3. chfn – Change a user’s finger information 4. chsh – Change a user’s shell. 5. chgrp – Changes the group ownership of files. 6. chown – Change [...]