ubuntu change root password code example

Example 1: set password to root ubuntu 20.04

$ sudo -i
$ passwd root
new password:...
confirm password:...

Example 2: linux change user password

passwd $user

Example 3: ubuntu passwordless sudo

sudo vim /etc/sudoers
# Find `includedir /etc/sudoers.d` usually last line of file
username ALL=(ALL) NOPASSWD: ALL

Example 4: change linux user password

#if you dont't have your root password => then don't use sudo command

# passwd <username>
Current password:
New password:
Retype new password:
passwd: password updated successfully

Example 5: passwd root

Step 1: Open a Terminal Window.
    		Right-click the desktop, then left-click Open in terminal.
            Alternately, you can click Menu > Applications > Accessories > Terminal.
    Step 2: Change Your Root Password.
    		In the terminal window, type the following:
            	- sudo passwd root.