Root password needed [duplicate]

Solution 1:

Okay, there is a difference between your password and the root password (the password of the account "root").

When you first installed Ubuntu, you specified your username (let's say you chose Ele) and your password; this is the password that you would use to log in. Since you have Ubuntu to log in automatically, you won't be asked for this password when booting Ubuntu.

The default installation of Ubuntu makes your user an admin; that is, it makes you able to install and remove applications and all that. The password that is asked when you install/remove components is usually your password, Ele's password. Take a look at these screenshots:

• This program is asking you to Enter your password, so this would be the password of Ele, that you used to install Ubuntu, which is the same password you use to log in.

• If you did not set a password when you were installing Ubuntu (and I think this is where your problem is Ele), then you need to set a password for your user. To do so, simply type the following command (commands can be typed in a terminal which you can open by Ctrl+Alt+T):

  passwd
  

  And enter your new password. Note: you won't see any stars *** or anything; don't worry, just continue typing.

Now, let's look at another kind of prompt that could ask you for a password:

• This program is asking you to Enter the administrative password, which is the root password, the superuser password, the password of the account "root". This password is NOT set by default.

• It is generally not advisable to set a root password unless you really need to, because it essentially opens doors to lots of accidental, harmful tasks. But, if you really want to set the root password, you would do this:

  sudo passwd root
  

  It will first ask you to enter your password, in order to carry out this command (because you typed sudo). Then, it will ask you to specify a new root password.

  • If your account does not have a password set in the first place, this command will not work, because you are performing a sudo command, which will require your password first.

• Note1: if you have set a root password and you want to remove it and go back to how it was, do this command:

  sudo passwd -dl root
  

  It will, again, ask you for your password, because you are doing a command that starts with sudo. This command deletes the password and locks the root account.

• Note2: you should rarely see this second screenshot, the one that's asking for the root password. Usually, you'll be asked to enter your user's password. That is how Ubuntu is set up, so that you don't need to log in as the root (superuser) to perform administrative tasks, you only "borrow" the root privileges by using the command sudo.

Solution 2:

Use

sudo passwd

Essentially, it makes root do 'passwd' which sets a password for the user who used the command.