Can't upgrade or update

[Jacek_Czerniawski]

Hello
I have a problem with update or upgrade my 11.10. During update got message :
W:Failed to fetch http://archive.ubuntu.com/ubuntu/dists/oneiric/main/source/Sources 404 Not Found [IP: 91.189.92.201 80]
tried to switch to other server (local Polish), but the same error.
When tried to upgrade to 12.04.4 via update manager got message : "Version Authentication problem"
Please help.
Jacek

My source.list

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

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

## 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 oneiric partner
deb-src http://archive.canonical.com/ubuntu oneiric partner

## Uncomment the following two lines to add software from Ubuntu's
## 'extras' repository.
## 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 oneiric main
# deb-src http://extras.ubuntu.com/ubuntu oneiric main


deb http://archive.ubuntu.com/ubuntu oneiric-proposed restricted main multiverse universe
deb http://security.ubuntu.com/ubuntu/ oneiric-security restricted main multiverse universe

[Bashing-om]

Jacek_Czerniawski; Hello; Welcome to the forum .

As you now know oneiric is End-Of-Life and no longer enjoys support. The software repository has been turned down and redirected.
One may do an on-line version upgrade:
The tutorial to do the online version upgrade:
https://help.ubuntu.com/community/EOLUpgrades
The documentation is old, but still applies.

Else, one can do a clean install of the current LTS release 14.04:
http://www.ubuntu.com/download/desktop



Hope this Helps