As default Ubuntu has no password set for the root user, i.e., the account named
root. To gain root privileges as another user you have to type in your own password. This is the password you set for the first user account while installing Ubuntu.
To set a password for the
root, run the following command in a Terminal shell:
sudo passwd root
After this you are asked to type in the new password twice. After this the
root account has its own password, so you can actually log in with the user name
The root password on Ubuntu systems is left unset and unusable on purpose. Ubuntu uses
sudo (switch user do) to elevate the privileges of an administrative user. (The user created on installation is, by default, an administrative user.). Sudo logs everything passed to it, which is useful, as you can check later what commands have been run with it.
If you're being prompted for any password, it's most likely your own (user) password that's needed.
Root account is by default disabled -- that means root has no password. Ubuntu is using sudo -- sudo allows "normal users" to run commands with superuser privilegies and and to "run" sudo they are using their own password.
More information here: https://help.ubuntu.com/community/RootSudo
Please see the link below:
By default the root account is disabled, and you won't have the password for your root account. If you need the password for your root account, then you have to create one for root:
sudo passwd root
- Enabling the Root account is rarely necessary.
- Almost everything you need to do as an administrator of a Ubuntu system can be done via sudo or gksudo.
You can find information for enabling the root account in RootSudo. Use it at your own risk.
Encryption for passwords was invented to protect them from viewing. You cannot just view it, but you can change it without viewing old one. The only way to view an encrypted password is to decode it. You can try, encrypted passwords are in file
/etc/shadow, but you'll just waste your time.
So just change the root password like this: