root@ArshiaAghaei:~# bash -c "http_proxy=http://164.77.196.76:80 apt-get update"Ign cdrom://Ubuntu 14.04.1 LTS _Trusty Tahr_ - Release i386 (20140722.2) trusty InRelease
Ign cdrom://Ubuntu 14.04.1 LTS _Trusty Tahr_ - Release i386 (20140722.2) trusty Release.gpg
Ign cdrom://Ubuntu 14.04.1 LTS _Trusty Tahr_ - Release i386 (20140722.2) trusty Release
Err cdrom://Ubuntu 14.04.1 LTS _Trusty Tahr_ - Release i386 (20140722.2) trusty/main i386 Packages
Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
Err cdrom://Ubuntu 14.04.1 LTS _Trusty Tahr_ - Release i386 (20140722.2) trusty/restricted i386 Packages
Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
Ign cdrom://Ubuntu 14.04.1 LTS _Trusty Tahr_ - Release i386 (20140722.2) trusty/main Translation-en_US
Ign cdrom://Ubuntu 14.04.1 LTS _Trusty Tahr_ - Release i386 (20140722.2) trusty/main Translation-en
Ign cdrom://Ubuntu 14.04.1 LTS _Trusty Tahr_ - Release i386 (20140722.2) trusty/restricted Translation-en_US
Ign cdrom://Ubuntu 14.04.1 LTS _Trusty Tahr_ - Release i386 (20140722.2) trusty/restricted Translation-en
Ign http://extras.ubuntu.com trusty InRelease
Ign http://ppa.launchpad.net trusty InRelease
Ign http://ppa.launchpad.net trusty InRelease
Get:1 http://extras.ubuntu.com trusty Release.gpg [72 B]
Ign http://ppa.launchpad.net trusty Release.gpg
Get:2 http://dl.google.com stable InRelease [1,540 B]
99% [2 InRelease gpgv 1,540 B] [Waiting for headers] [Connecting to 164.77.196.Splitting up /var/lib/apt/lists/partial/dl.google.com_linux_chrome_deb_dists_stabIgn http://dl.google.com stable InRelease
E: GPG error: http://dl.google.com stable InRelease: Clearsigned file isn't valid, got 'NODATA' (does the network require authentication?)