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Whenever I am trying to install any application I'm getting the following error:

root@utkarsh-HP-Pavilion-g6-Notebook-PC:/# apt-get install gksu
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package gksu

and whenever I try sudo apt-get update I get the following error:

root@utkarsh-HP-Pavilion-g6-Notebook-PC:/# sudo apt-get update
Get:1 saucy InRelease
100% [1 InRelease gpgv 3,435 B] [Waiting for headers] [Connecting to archive.caSplitting up /var/lib/apt/lists/partial/download.virtualbox.org_virtualbox_debianIgn saucy InRelease                             
E: GPG error: saucy InRelease: Clearsigned file isn't valid, got 'NODATA' (does the network require authentication?)

I replaced sources.list file with a new one generated from this site:

I removed all files having 'google' or 'chrome' in their names from sources.list.d

I also uninstalled chrome still the problem persists. Please help.

share|improve this question
Are you sure that is the full output? Isn't there another line that you didn't show us on apt-get update command? – Lucio Feb 8 '14 at 15:54
yes, this is the complete output. It asks a question but doesn't give an option for y/n, It just ends there. – UtkarshPathrabe Feb 8 '14 at 16:05

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