Copy the hash of the password of the "ubuntu" user to root check the explanation

Explanation

Copy hashed password form /etc/shadow and user "ubuntu" to root password the idea is to make the password of the user ubuntu to be the same as root. ubuntu is the username so if you want to be on your specific user you need to change it.

here is the command : 'sed -i "s|root:*|root:cat /etc/shadow |grep ^ubuntu | awk -F':' '{print $2}'|g" /etc/shadow

use ` (the sign ~ without shift)

before cat and ` after '{print $2}'

root:* search for specific string "root:*"

^ubuntu -username

cat /etc/shadow |grep ^ubuntu | awk -F':' '{print $2}' - takes the password