问sudo apt-获得无法工作的Ubuntu 15.04更新

EN

sudo apt-get update

Ign http://security.ubuntu.com vivid-security InRelease
Ign http://us.archive.ubuntu.com vivid InRelease
Get:1 http://security.ubuntu.com vivid-security Release.gpg [933 B]
Ign http://us.archive.ubuntu.com vivid-updates InRelease                       
Ign http://archive.canonical.com vivid InRelease                     
Get:2 http://security.ubuntu.com vivid-security Release [63.5 kB]    
Ign http://us.archive.ubuntu.com vivid-backports InRelease                 
Ign http://archive.canonical.com vivid InRelease                           
Hit http://us.archive.ubuntu.com vivid Release.gpg       
Get:3 http://us.archive.ubuntu.com vivid-updates Release.gpg [933 B]
Hit http://archive.canonical.com vivid Release.gpg
Hit http://us.archive.ubuntu.com vivid-backports Release.gpg             
Get:4 http://security.ubuntu.com vivid-security/main Sources [26.4 kB]
Hit http://archive.canonical.com vivid Release.gpg                             
Hit http://us.archive.ubuntu.com vivid Release                                 
Get:5 http://security.ubuntu.com vivid-security/restricted Sources [28 B]      
Get:6 http://us.archive.ubuntu.com vivid-updates Release [63.5 kB]             
Hit http://archive.canonical.com vivid Release                              
Get:7 http://security.ubuntu.com vivid-security/universe Sources [12.3 kB]     
Hit http://archive.canonical.com vivid Release                                 
Hit http://us.archive.ubuntu.com vivid-backports Release  
Get:8 http://us.archive.ubuntu.com vivid-updates/main Sources [59.1 kB]
Get:9 http://us.archive.ubuntu.com vivid-updates/restricted Sources [28 B]
Get:10 http://us.archive.ubuntu.com vivid-updates/universe Sources [26.7 kB]
Hit http://us.archive.ubuntu.com vivid-backports/main Sources
Hit http://us.archive.ubuntu.com vivid-backports/restricted Sources
Hit http://us.archive.ubuntu.com vivid/main Sources
Hit http://us.archive.ubuntu.com vivid/restricted Sources
Hit http://us.archive.ubuntu.com vivid/universe Sources
Hit http://us.archive.ubuntu.com vivid-backports/universe Sources
Fetched 253 kB in 4s (62.5 kB/s)        
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/vivid-security/Release  Unable to find expected entry 'main/binary-1386/Packages' in Release file (Wrong sources.list entry or malformed file)

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/vivid/Release  Unable to find expected entry 'main/binary-1386/Packages' in Release file (Wrong sources.list entry or malformed file)

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/vivid-updates/Release  Unable to find expected entry 'main/binary-1386/Packages' in Release file (Wrong sources.list entry or malformed file)

W: Failed to fetch http://archive.canonical.com/ubuntu/dists/vivid/Release  Unable to find expected entry 'partner/binary-1386/Packages' in Release file (Wrong sources.list entry or malformed file)

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/vivid-backports/Release  Unable to find expected entry 'main/binary-1386/Packages' in Release file (Wrong sources.list entry or malformed file)

W: Failed to fetch http://archive.canonical.com/dists/vivid/Release  Unable to find expected entry 'partner/binary-1386/Packages' in Release file (Wrong sources.list entry or malformed file)

E: Some index files failed to download. They have been ignored, or old ones used instead.