root@ArshiaAghaei:~# apt-get update
Ign http://ir.archive.ubuntu.com trusty InRelease
Ign http://ir.archive.ubuntu.com trusty-updates InRelease
Ign http://extras.ubuntu.com trusty InRelease
Ign http://ir.archive.ubuntu.com trusty-backports InRelease
Ign http://security.ubuntu.com trusty-security InRelease
Hit http://ir.archive.ubuntu.com trusty Release.gpg
Hit http://extras.ubuntu.com trusty Release.gpg
Hit http://ir.archive.ubuntu.com trusty-updates Release.gpg
Hit http://ir.archive.ubuntu.com trusty-backports Release.gpg
Hit http://extras.ubuntu.com trusty Release
Get:1 http://security.ubuntu.com trusty-security Release.gpg [933 B]
Hit http://ir.archive.ubuntu.com trusty Release
Hit http://extras.ubuntu.com trusty/main Sources
Hit http://ir.archive.ubuntu.com trusty-updates Release
Get:2 http://security.ubuntu.com trusty-security Release [62.0 kB]
Hit http://ir.archive.ubuntu.com trusty-backports Release
Hit http://extras.ubuntu.com trusty/main i386 Packages
Get:3 http://ir.archive.ubuntu.com trusty/main Sources [1,064 kB]
Ign http://ppa.launchpad.net trusty InRelease
Ign http://ppa.launchpad.net trusty Release.gpg
Get:4 http://security.ubuntu.com trusty-security/main Sources [64.4 kB]
Ign http://ppa.launchpad.net trusty Release
Ign http://extras.ubuntu.com trusty/main Translation-en_US
Ign http://extras.ubuntu.com trusty/main Translation-en
Get:5 http://dl.google.com stable InRelease [1,540 B]
51% [5 InRelease gpgv 1,540 B] [3 Sources 478 kB/1,064 kB 45%] [Connecting to sSplitting 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?