How to change a user password and expiry in Linux

Set or reset a password and control password aging. Run as root to change another user password.

Changing another user password or forcing expiry locks them out until they set a new one. Make sure you are acting on the right account.

# Set / reset a password
sudo passwd <user>

# Force a password change at next login
sudo passwd -e <user>

# Expire the password after 90 days, warn 7 days before
sudo chage -M 90 -W 7 <user>

# Show the resulting aging settings
sudo chage -l <user>