root@ArshiaAghaei:~# apt-get update
Ign http://extras.ubuntu.com trusty InRelease
Get:1 http://extras.ubuntu.com trusty Release.gpg [72 B]                       
Get:2 http://extras.ubuntu.com trusty Release [11.9 kB]                        
Get:3 http://extras.ubuntu.com trusty/main Sources [14 B]                      
Get:4 http://extras.ubuntu.com trusty/main i386 Packages [14 B]                
Ign http://extras.ubuntu.com trusty/main Translation-en_US                     
Ign http://extras.ubuntu.com trusty/main Translation-en                        
Ign http://ir.archive.ubuntu.com trusty InRelease                              
Ign http://ir.archive.ubuntu.com trusty-updates InRelease                      
Ign http://ir.archive.ubuntu.com trusty-backports InRelease                    
Get:5 http://ir.archive.ubuntu.com trusty Release.gpg [933 B]                  
Get:6 http://ir.archive.ubuntu.com trusty-updates Release.gpg [933 B]          
Get:7 http://dl.google.com stable InRelease [1,540 B]                          
100% [7 InRelease gpgv 1,540 B] [Waiting for headers] [Connecting to security.uSplitting 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?)