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john@john-Latitude-E6420:~$ sudo apt-get install gnuradio
[sudo] password for john: 

Total Linux newbie. What is wanted for [sudo] password for john?

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  • This is the password you use at the login screen (i.e., the password for user `john`). – lemonslice Aug 25 '15 at 17:00
  • Please note that, for security reasons, the password is not echoed back; not even ****. Just type it in and press `Enter.` – chili555 Aug 25 '15 at 21:23
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    possible duplicate of [How can I determine the sudo password?](http://askubuntu.com/questions/297046/how-can-i-determine-the-sudo-password) – muru Sep 09 '15 at 18:46

1 Answers1

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your password that you use to login. as you type it will appear blank. just type it anyway and hit enter.

resources on 'sudo'

https://help.ubuntu.com/community/RootSudo

its a tedious read but will inform you well on what sudo/root is and what it can do for you