passwd on Linux is a command that allows you to change the password of your own account, and other users too. passwd is integrated in Linux, so you don't need to install any other tool in order to use this command. passwd works the same for any Linux distribution, so no mater what linux Distro you are using, you can use this command to change passwords anytime you need. In this tutorial, you will learn how to change your own password and other users password on Linux. 1) Change your