Getting 404 not found errors when doing `sudo apt-get update`

cat /etc/issue
Ubuntu 14.04.1 LTS \n \l

I am getting the following errors when doing sudo apt-get update, I have tried sudo apt-get dist-upgrade as recommended here but nothing seems to fix the issue. It appears from reading other questions relating to this issue that the Ubuntu version was no longer supported but I am running the latest version of Ubuntu.

Ign http://au.archive.ubuntu.com trusty InRelease
Ign http://au.archive.ubuntu.com trusty-updates InRelease                      
Ign http://au.archive.ubuntu.com trusty-backports InRelease                    
Ign http://dl.google.com stable InRelease                                      
Ign http://au.archive.ubuntu.com trusty-security InRelease                     
Hit http://au.archive.ubuntu.com trusty Release.gpg                            
Hit http://au.archive.ubuntu.com trusty-updates Release.gpg                    
Hit http://au.archive.ubuntu.com trusty-backports Release.gpg                  
Hit http://dl.google.com stable Release.gpg                                    
Hit http://au.archive.ubuntu.com trusty-security Release.gpg                   
Hit http://au.archive.ubuntu.com trusty Release                                
Hit http://au.archive.ubuntu.com trusty-updates Release                        
Hit http://au.archive.ubuntu.com trusty-backports Release                      
Hit http://dl.google.com stable Release                                        
Hit http://au.archive.ubuntu.com trusty-security Release                       
Hit http://apt.insynchq.com trusty InRelease                                   
Hit http://au.archive.ubuntu.com trusty/main Sources                           
Ign http://archive.ubuntu.com main InRelease                                   
Ign http://extras.ubuntu.com trusty InRelease                                  
Ign http://archive.canonical.com trusty InRelease                              
Ign http://ppa.launchpad.net trusty InRelease                                  
Hit http://au.archive.ubuntu.com trusty/restricted Sources                     
Hit http://au.archive.ubuntu.com trusty/universe Sources                       
Hit http://dl.google.com stable/main amd64 Packages                            
Hit http://au.archive.ubuntu.com trusty/multiverse Sources                     
Hit http://au.archive.ubuntu.com trusty/main amd64 Packages                    
Hit http://au.archive.ubuntu.com trusty/restricted amd64 Packages              
Hit http://au.archive.ubuntu.com trusty/universe amd64 Packages                
Hit http://dl.google.com stable/main i386 Packages                             
Hit http://apt.insynchq.com trusty/non-free amd64 Packages                     
Ign http://archive.ubuntu.com main Release.gpg                                 
Hit http://extras.ubuntu.com trusty Release.gpg                                
Hit http://au.archive.ubuntu.com trusty/multiverse amd64 Packages              
Hit http://archive.canonical.com trusty Release.gpg                            
Ign http://ppa.launchpad.net trusty InRelease                                  
Hit http://au.archive.ubuntu.com trusty/main i386 Packages                     
Hit http://au.archive.ubuntu.com trusty/restricted i386 Packages               
Hit http://au.archive.ubuntu.com trusty/universe i386 Packages                 
Hit http://au.archive.ubuntu.com trusty/multiverse i386 Packages               
Hit http://au.archive.ubuntu.com trusty/main Translation-en_AU                 
Hit http://apt.insynchq.com trusty/contrib amd64 Packages                      
Hit http://au.archive.ubuntu.com trusty/main Translation-en                    
Ign http://archive.ubuntu.com main Release                                     
Hit http://au.archive.ubuntu.com trusty/main Translation-en_GB                 
Hit http://extras.ubuntu.com trusty Release                                    
Hit http://archive.canonical.com trusty Release                                
Ign http://ppa.launchpad.net trusty InRelease                                  
Hit http://au.archive.ubuntu.com trusty/multiverse Translation-en_AU           
Hit http://au.archive.ubuntu.com trusty/multiverse Translation-en              
Hit http://au.archive.ubuntu.com trusty/multiverse Translation-en_GB           
Hit http://au.archive.ubuntu.com trusty/restricted Translation-en_AU           
Hit http://au.archive.ubuntu.com trusty/restricted Translation-en              
Hit http://apt.insynchq.com trusty/non-free i386 Packages                      
Hit http://au.archive.ubuntu.com trusty/restricted Translation-en_GB           
Hit http://au.archive.ubuntu.com trusty/universe Translation-en_AU             
Ign http://ppa.launchpad.net trusty InRelease                                  
Hit http://archive.canonical.com trusty/partner amd64 Packages                 
Hit http://au.archive.ubuntu.com trusty/universe Translation-en                
Hit http://au.archive.ubuntu.com trusty/universe Translation-en_GB             
Hit http://au.archive.ubuntu.com trusty-updates/main Sources                   
Hit http://au.archive.ubuntu.com trusty-updates/restricted Sources             
Hit http://apt.insynchq.com trusty/contrib i386 Packages                       
Hit http://au.archive.ubuntu.com trusty-updates/universe Sources               
Hit http://extras.ubuntu.com trusty/main amd64 Packages                        
Hit http://au.archive.ubuntu.com trusty-updates/multiverse Sources             
Ign http://ppa.launchpad.net trusty InRelease                                  
Hit http://archive.canonical.com trusty/partner i386 Packages                  
Hit http://au.archive.ubuntu.com trusty-updates/main amd64 Packages            
Hit http://au.archive.ubuntu.com trusty-updates/restricted amd64 Packages      
Hit http://au.archive.ubuntu.com trusty-updates/universe amd64 Packages        
Hit http://au.archive.ubuntu.com trusty-updates/multiverse amd64 Packages      
Hit http://au.archive.ubuntu.com trusty-updates/main i386 Packages             
Hit http://au.archive.ubuntu.com trusty-updates/restricted i386 Packages       
Hit http://au.archive.ubuntu.com trusty-updates/universe i386 Packages         
Hit http://extras.ubuntu.com trusty/main i386 Packages                         
Hit http://au.archive.ubuntu.com trusty-updates/multiverse i386 Packages       
Ign http://ppa.launchpad.net trusty InRelease                                  
Hit http://au.archive.ubuntu.com trusty-updates/main Translation-en            
Hit http://au.archive.ubuntu.com trusty-updates/multiverse Translation-en      
Hit http://au.archive.ubuntu.com trusty-updates/restricted Translation-en      
Hit http://au.archive.ubuntu.com trusty-updates/universe Translation-en        
Hit http://au.archive.ubuntu.com trusty-backports/main Sources                 
Hit http://au.archive.ubuntu.com trusty-backports/restricted Sources           
Hit http://au.archive.ubuntu.com trusty-backports/universe Sources             
Ign http://ppa.launchpad.net trusty InRelease                                  
Hit http://au.archive.ubuntu.com trusty-backports/multiverse Sources           
Hit http://au.archive.ubuntu.com trusty-backports/main amd64 Packages          
Hit http://au.archive.ubuntu.com trusty-backports/restricted amd64 Packages    
Hit http://au.archive.ubuntu.com trusty-backports/universe amd64 Packages      
Hit http://au.archive.ubuntu.com trusty-backports/multiverse amd64 Packages    
Hit http://au.archive.ubuntu.com trusty-backports/main i386 Packages           
Hit http://au.archive.ubuntu.com trusty-backports/restricted i386 Packages     
Hit http://ppa.launchpad.net trusty Release.gpg                                
Ign http://archive.canonical.com trusty/partner Translation-en                 
Hit http://au.archive.ubuntu.com trusty-backports/universe i386 Packages       
Hit http://au.archive.ubuntu.com trusty-backports/multiverse i386 Packages     
Hit http://au.archive.ubuntu.com trusty-backports/main Translation-en          
Ign http://dl.google.com stable/main Translation-en_AU                         
Hit http://au.archive.ubuntu.com trusty-backports/multiverse Translation-en    
Hit http://au.archive.ubuntu.com trusty-backports/restricted Translation-en    
Hit http://au.archive.ubuntu.com trusty-backports/universe Translation-en      
Hit http://au.archive.ubuntu.com trusty-security/main Sources                  
Ign http://dl.google.com stable/main Translation-en                            
Hit http://ppa.launchpad.net trusty Release.gpg                                
Hit http://au.archive.ubuntu.com trusty-security/restricted Sources            
Hit http://au.archive.ubuntu.com trusty-security/universe Sources              
Hit http://au.archive.ubuntu.com trusty-security/multiverse Sources            
Ign http://dl.google.com stable/main Translation-en_GB                         
Hit http://au.archive.ubuntu.com trusty-security/main amd64 Packages           
Hit http://au.archive.ubuntu.com trusty-security/restricted amd64 Packages     
Hit http://au.archive.ubuntu.com trusty-security/universe amd64 Packages       
Hit http://ppa.launchpad.net trusty Release.gpg                                
Hit http://au.archive.ubuntu.com trusty-security/multiverse amd64 Packages     
Hit http://au.archive.ubuntu.com trusty-security/main i386 Packages            
Hit http://au.archive.ubuntu.com trusty-security/restricted i386 Packages      
Hit http://au.archive.ubuntu.com trusty-security/universe i386 Packages        
Hit http://au.archive.ubuntu.com trusty-security/multiverse i386 Packages      
Hit http://au.archive.ubuntu.com trusty-security/main Translation-en           
Hit http://au.archive.ubuntu.com trusty-security/multiverse Translation-en     
Hit http://au.archive.ubuntu.com trusty-security/restricted Translation-en     
Hit http://ppa.launchpad.net trusty Release.gpg                                
Hit http://au.archive.ubuntu.com trusty-security/universe Translation-en       
Hit http://ppa.launchpad.net trusty Release.gpg                                
Hit http://ppa.launchpad.net trusty Release.gpg                                
Hit http://ppa.launchpad.net trusty Release.gpg                       
Hit http://ppa.launchpad.net trusty Release                           
Hit http://ppa.launchpad.net trusty Release                                    
Hit http://ppa.launchpad.net trusty Release                                    
Hit http://ppa.launchpad.net trusty Release                                    
Hit http://ppa.launchpad.net trusty Release                                    
Ign http://extras.ubuntu.com trusty/main Translation-en_AU                     
Ign http://extras.ubuntu.com trusty/main Translation-en                        
Hit http://ppa.launchpad.net trusty Release                           
Ign http://extras.ubuntu.com trusty/main Translation-en_GB                     
Hit http://ppa.launchpad.net trusty Release                                    
Hit http://ppa.launchpad.net trusty/main amd64 Packages                        
Hit http://ppa.launchpad.net trusty/main i386 Packages                         
Hit http://ppa.launchpad.net trusty/main Translation-en                        
Hit http://ppa.launchpad.net trusty/main amd64 Packages                        
Hit http://ppa.launchpad.net trusty/main i386 Packages                         
Ign http://apt.insynchq.com trusty/contrib Translation-en_AU                   
Hit http://ppa.launchpad.net trusty/main amd64 Packages                        
Ign http://apt.insynchq.com trusty/contrib Translation-en                      
Hit http://ppa.launchpad.net trusty/main i386 Packages                         
Ign http://apt.insynchq.com trusty/contrib Translation-en_GB                   
Ign http://apt.insynchq.com trusty/non-free Translation-en_AU                  
Hit http://ppa.launchpad.net trusty/main Translation-en                        
Ign http://apt.insynchq.com trusty/non-free Translation-en                     
Hit http://ppa.launchpad.net trusty/main amd64 Packages                        
Ign http://apt.insynchq.com trusty/non-free Translation-en_GB                  
Hit http://ppa.launchpad.net trusty/main i386 Packages                         
Hit http://ppa.launchpad.net trusty/main amd64 Packages                        
Hit http://ppa.launchpad.net trusty/main i386 Packages                         
Hit http://ppa.launchpad.net trusty/main Translation-en                        
Hit http://ppa.launchpad.net trusty/main amd64 Packages                        
Hit http://ppa.launchpad.net trusty/main i386 Packages                         
Hit http://ppa.launchpad.net trusty/main Translation-en                        
Hit http://ppa.launchpad.net trusty/main amd64 Packages                        
Hit http://ppa.launchpad.net trusty/main i386 Packages                         
Hit http://ppa.launchpad.net trusty/main Translation-en                        
Err http://archive.ubuntu.com main/universe amd64 Packages                     
  404  Not Found [IP: 91.189.92.200 80]
Err http://archive.ubuntu.com main/restricted amd64 Packages                   
  404  Not Found [IP: 91.189.92.200 80]
Err http://archive.ubuntu.com main/multiverse amd64 Packages                   
  404  Not Found [IP: 91.189.92.200 80]
Ign http://ppa.launchpad.net trusty/main Translation-en_AU                     
Err http://archive.ubuntu.com main/universe i386 Packages                      
  404  Not Found [IP: 91.189.92.200 80]
Ign http://ppa.launchpad.net trusty/main Translation-en                        
Err http://archive.ubuntu.com main/restricted i386 Packages                    
  404  Not Found [IP: 91.189.92.200 80]
Ign http://ppa.launchpad.net trusty/main Translation-en_GB                     
Err http://archive.ubuntu.com main/multiverse i386 Packages                    
  404  Not Found [IP: 91.189.92.200 80]
Ign http://ppa.launchpad.net trusty/main Translation-en_AU                     
Ign http://archive.ubuntu.com main/multiverse Translation-en_AU                
Ign http://ppa.launchpad.net trusty/main Translation-en                        
Ign http://archive.ubuntu.com main/multiverse Translation-en                   
Ign http://ppa.launchpad.net trusty/main Translation-en_GB                     
Ign http://archive.ubuntu.com main/multiverse Translation-en_GB                
Ign http://archive.ubuntu.com main/restricted Translation-en_AU                
Ign http://archive.ubuntu.com main/restricted Translation-en                   
Ign http://archive.ubuntu.com main/restricted Translation-en_GB                
Ign http://archive.ubuntu.com main/universe Translation-en_AU                  
Ign http://archive.ubuntu.com main/universe Translation-en                     
Ign http://archive.ubuntu.com main/universe Translation-en_GB
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/main/universe/binary-amd64/Packages  404  Not Found [IP: 91.189.92.200 80]

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/main/restricted/binary-amd64/Packages  404  Not Found [IP: 91.189.92.200 80]

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/main/multiverse/binary-amd64/Packages  404  Not Found [IP: 91.189.92.200 80]

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/main/universe/binary-i386/Packages  404  Not Found [IP: 91.189.92.200 80]

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/main/restricted/binary-i386/Packages  404  Not Found [IP: 91.189.92.200 80]

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/main/multiverse/binary-i386/Packages  404  Not Found [IP: 91.189.92.200 80]

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

/etc/apt/sources.list

# deb cdrom:[Ubuntu 14.04.1 LTS _Trusty Tahr_ - Release amd64 (20140722.2)]/ trusty main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://archive.ubuntu.com/ubuntu trusty main restricted
deb-src http://archive.ubuntu.com/ubuntu trusty main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://archive.ubuntu.com/ubuntu trusty-updates main restricted
deb-src http://archive.ubuntu.com/ubuntu trusty-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://archive.ubuntu.com/ubuntu trusty universe
deb-src http://archive.ubuntu.com/ubuntu trusty universe
deb http://archive.ubuntu.com/ubuntu trusty-updates universe
deb-src http://archive.ubuntu.com/ubuntu trusty-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://archive.ubuntu.com/ubuntu trusty multiverse
deb-src http://archive.ubuntu.com/ubuntu trusty multiverse
deb http://archive.ubuntu.com/ubuntu trusty-updates multiverse
deb-src http://archive.ubuntu.com/ubuntu trusty-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://archive.ubuntu.com/ubuntu trusty-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu trusty-backports main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu trusty-security main restricted
deb-src http://archive.ubuntu.com/ubuntu trusty-security main restricted
deb http://archive.ubuntu.com/ubuntu trusty-security universe
deb-src http://archive.ubuntu.com/ubuntu trusty-security universe
deb http://archive.ubuntu.com/ubuntu trusty-security multiverse
deb-src http://archive.ubuntu.com/ubuntu trusty-security multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
deb http://archive.canonical.com/ubuntu trusty partner
# deb-src http://archive.canonical.com/ubuntu trusty partner

## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
deb http://extras.ubuntu.com/ubuntu trusty main
# deb-src http://extras.ubuntu.com/ubuntu trusty main
# deb-src http://archive.ubuntu.com/ubuntu trusty main universe restricted multiverse
# deb-src http://archive.ubuntu.com/ubuntu trusty main universe restricted multiverse
deb http://archive.ubuntu.com/ubuntu main universe restricted multiverse
# deb-src http://archive.ubuntu.com/ubuntu main universe restricted multiverse

To change all of your deprecated urls http://archive.ubuntu.com to the working urls http://old-releases.ubuntu.com

sudo sed -i -e 's/:\/\/(archive.ubuntu.com\|security.ubuntu.com)/old-releases.ubuntu.com/g' /etc/apt/sources.list

This answer is based on https://smyl.es/how-to-fix-ubuntudebian-apt-get-404-not-found-package-repository-errors-saucy-raring-quantal-oneiric-natty/


Remove the line that reads deb http://archive.ubuntu.com/ubuntu main universe restricted multiverse (and the commented line after that, if you wish). Then run sudo apt-get update. There should be no errors now.


First run sudo apt-get -y upgrade to get apt-get repointed correctly.

Then you can run such commands as:

sudo apt-get -y update
sudo apt-get -y dist-upgrade

without getting the "404 Not Found" error.


In my case, it was because the distro (disco, not an LTS release) had been EOL'd and had been removed from http://archive.ubuntu.com/ubuntu/dists

You could check whether a new release is available:

sudo do-release-upgrade -c