How to change the password on the Ubuntu 18 operating system

To change the password on Ubuntu 18 you need to open a terminal and enter the following command:

$ passwd [settings] [user_name]

To change the password for another user, you need to log in as superuser:

$ sudo passwd user

Here user is the user for whom you want to change the password in Ubuntu.

You can delete the password in Linux for a user, then the user will not be able to log in.

$ sudo passwd -d user