sudo apt-get update não funciona Ubuntu 15.04 [duplicado]

Question

Sempre que eu coloco o comando

sudo apt-get update

Ele retorna:

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.

Por favor ajude. Eu tenho tentado instalar o Skype por um longo tempo e eu tentei inúmeras correções.

UPDATE: I can't install steam because of this either.

    

Answer 1

Eu tive algumas vezes o mesmo problema. Eu acho que você não pode instalar nada certo? Eu consertei com 2 soluções.

Primeiro tente melhor espelhar por atualizações.

Finding fastest mirror from the graphical mode is very easy. All you to do is open Synaptic package Manager, go to Settings -> Repositories. From the Ubuntu Software section, Select “Other” in the “Download From” drop-down box, and click on Select Best Mirror.

Fonte

E depois remova qualquer ppa que não esteja funcionando.

Remove a PPA using a GUI: A PPA can also be removed by opening Software Sources (Ubuntu Software Center > Edit > Software Sources), then going to the "Other Software" tab, selecting the PPA you want to remove and then clicking the "Remove" button.

Each PPA should have two lines here, one for the compiled packages and one for the source, so remove both lines.

Fonte

Um deles pode ajudá-lo.