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I've made new admin account. I did not set a password for that account and it now asks me for the password. Since I can access the account as it automatically logs on when the laptop is turned on, can I set a new password?

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Linux is a known for its security. And password protection is first priority of linux. You always have to set password either you use it or not. –  Dishank Jul 27 at 20:17
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@Dishank Thats completely wrong. You can have accounts with no password even root. –  Shutupsquare Jul 27 at 20:44
    
But when you need to install new packages, you will face auth failed every time. –  Dishank Jul 27 at 20:46
    
@Dishank Not if you configure polkit –  Shutupsquare Jul 27 at 20:54
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Regardless, if you don't have a password on auth or admin - you're crazy. –  rm-vanda Jul 27 at 20:56

3 Answers 3

You can set a password from terminal, just open up your favorite terminal and type:

passwd

If your feeling advanced you can stop Ubuntu prompting for password by configuring polkit

Here's an example of configuring polkit to enable users to install apps without authentication.

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Oh yes. I totally forget. Thanks mate. You made my Below answer totally wrong. –  Dishank Jul 27 at 20:51
    
A much easier way to allow users to install apps without authentication (generally a bad idea) - is to run sudo visudo and add: yourUser ALL=(ALL) NOPASSWD: /usr/bin/apt-get,/usr/bin/pip #etc –  rm-vanda Jul 27 at 21:02
    
@rm-vanda Your completely correct. I'm guessing from the tone of the OP's question that they are not of the sudo apt-get kind but are using Ubuntu like a good old user and getting hit for GUI authentication. –  Shutupsquare Jul 27 at 21:08
    
Ah, yes, I forget those people exist. O_< -- wouldn't that trick work if the command were /usr/bin/software-center -? –  rm-vanda Jul 27 at 21:18
    
@rm-vanda Yes, but user would have to still type sudo /usr/bin/software-center –  Shutupsquare Jul 27 at 21:26

There is no way you can set password from there.

Restart your PC.

Go to recovery mode.

Press enter on prompt-shell

(command prompt will open with root access)

Type :- passwd (admin-name)

Then its all ok.

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best answer because it's general -- works in a variety of situations. –  Thufir Sep 19 at 5:05

From the sounds of it, you may not understand what exactly an "admin" account is - My answer may be irrelevant, but it seems appropriate to leave it here, anyway.

For a user to be an "admin" - they have to be in the sudo group -

$ sudo usermod -G sudo -a yourAdminUser

and then yourAdminUser will be a real admin.

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Simpler way: sudo adduser yourAdminUser sudo –  muru Jul 27 at 21:12
    
That works if the user already exists? –  rm-vanda Jul 27 at 21:16
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yes. Given that user and group exists, sudo adduser user group adds user to group. –  muru Jul 27 at 21:17

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