ERRO NO $ SUDO APT-GET UPDATE [RESOLVIDO]

Galera, sou novo no vivaolinux, porém estou com problemas com o terminal no Linux Ubuntu, quando digito o comando:
$ sudo apt-get update
e teclo Enter, aparece isso:

Ign http://mega.nz ./ InRelease
Atingido http://repo.steampowered.com precise InRelease
Ign http://dl.google.com stable InRelease
Obter:1 http://mega.nz ./ Release.gpg [189 B]
Obter:2 http://mega.nz ./ Release [967 B]
Ign http://security.ubuntu.com gutsy-security InRelease
Ign http://ppa.launchpad.net utopic InRelease
Obter:3 http://mega.nz ./ Packages [1.181 B]
Ign http://security.ubuntu.com gutsy-security Release.gpg
Atingido http://dl.google.com stable Release.gpg
Ign http://ppa.launchpad.net utopic InRelease
Ign http://security.ubuntu.com gutsy-security Release
Atingido http://dl.google.com stable Release
Obter:4 http://repo.steampowered.com precise/steam Sources [550 B]
Ign http://ppa.launchpad.net utopic InRelease
Ign http://ppa.launchpad.net utopic InRelease
Obter:5 http://repo.steampowered.com precise/steam amd64 Packages [604 B]
Ign http://ppa.launchpad.net utopic Release.gpg
Obter:6 http://repo.steampowered.com precise/steam i386 Packages [800 B]
Atingido http://ppa.launchpad.net utopic Release.gpg
Atingido http://ppa.launchpad.net utopic Release.gpg
Atingido http://ppa.launchpad.net utopic Release.gpg
Ign http://ppa.launchpad.net utopic Release
Atingido http://ppa.launchpad.net utopic Release
Ign http://archive.ubuntu.com gutsy InRelease
Atingido http://ppa.launchpad.net utopic Release
Ign http://archive.ubuntu.com gutsy-updates InRelease
Atingido http://ppa.launchpad.net utopic Release
Ign http://archive.ubuntu.com gutsy-backports InRelease
Ign http://archive.ubuntu.com gutsy Release.gpg
Ign http://archive.ubuntu.com gutsy-updates Release.gpg
Atingido http://dl.google.com stable/main amd64 Packages
Ign http://archive.ubuntu.com gutsy-backports Release.gpg
Atingido http://dl.google.com stable/main i386 Packages
Ign http://archive.ubuntu.com gutsy Release
Ign http://archive.ubuntu.com gutsy-updates Release
Ign http://archive.ubuntu.com gutsy-backports Release
Ign http://mega.nz ./ Translation-pt_BR
Ign http://mega.nz ./ Translation-pt
Ign http://repo.steampowered.com precise/steam Translation-pt_BR
Ign http://mega.nz ./ Translation-en
Ign http://repo.steampowered.com precise/steam Translation-pt
Ign http://repo.steampowered.com precise/steam Translation-en
Atingido http://ppa.launchpad.net utopic/main amd64 Packages
Atingido http://ppa.launchpad.net utopic/main i386 Packages
Atingido http://ppa.launchpad.net utopic/main Translation-en
Atingido http://ppa.launchpad.net utopic/main amd64 Packages
Atingido http://ppa.launchpad.net utopic/main i386 Packages
Atingido http://ppa.launchpad.net utopic/main Translation-en
Ign http://dl.google.com stable/main Translation-pt_BR
Atingido http://ppa.launchpad.net utopic/main amd64 Packages
Atingido http://ppa.launchpad.net utopic/main i386 Packages
Ign http://dl.google.com stable/main Translation-pt
Atingido http://ppa.launchpad.net utopic/main Translation-en
Ign http://dl.google.com stable/main Translation-en
Err http://ppa.launchpad.net utopic/main amd64 Packages
404 Not Found
Err http://ppa.launchpad.net utopic/main i386 Packages
404 Not Found
Ign http://ppa.launchpad.net utopic/main Translation-pt_BR
Ign http://ppa.launchpad.net utopic/main Translation-pt
Ign http://ppa.launchpad.net utopic/main Translation-en
Err http://security.ubuntu.com gutsy-security/main Sources
404 Not Found [IP: 91.189.91.24 80]
Err http://security.ubuntu.com gutsy-security/restricted Sources
404 Not Found [IP: 91.189.91.24 80]
Err http://security.ubuntu.com gutsy-security/universe Sources
404 Not Found [IP: 91.189.91.24 80]
Err http://security.ubuntu.com gutsy-security/multiverse Sources
404 Not Found [IP: 91.189.91.24 80]
Err http://security.ubuntu.com gutsy-security/main amd64 Packages
404 Not Found [IP: 91.189.91.24 80]
Err http://security.ubuntu.com gutsy-security/restricted amd64 Packages
404 Not Found [IP: 91.189.91.24 80]
Err http://security.ubuntu.com gutsy-security/universe amd64 Packages
404 Not Found [IP: 91.189.91.24 80]
Err http://security.ubuntu.com gutsy-security/multiverse amd64 Packages
404 Not Found [IP: 91.189.91.24 80]
Err http://security.ubuntu.com gutsy-security/main i386 Packages
404 Not Found [IP: 91.189.91.24 80]
Err http://security.ubuntu.com gutsy-security/restricted i386 Packages
404 Not Found [IP: 91.189.91.24 80]
Err http://security.ubuntu.com gutsy-security/universe i386 Packages
404 Not Found [IP: 91.189.91.24 80]
Err http://security.ubuntu.com gutsy-security/multiverse i386 Packages
404 Not Found [IP: 91.189.91.24 80]
Ign http://security.ubuntu.com gutsy-security/main Translation-pt_BR
Ign http://security.ubuntu.com gutsy-security/main Translation-pt
Ign http://security.ubuntu.com gutsy-security/main Translation-en
Ign http://security.ubuntu.com gutsy-security/multiverse Translation-pt_BR
Ign http://security.ubuntu.com gutsy-security/multiverse Translation-pt
Ign http://security.ubuntu.com gutsy-security/multiverse Translation-en
Ign http://security.ubuntu.com gutsy-security/restricted Translation-pt_BR
Ign http://security.ubuntu.com gutsy-security/restricted Translation-pt
Ign http://security.ubuntu.com gutsy-security/restricted Translation-en
Ign http://security.ubuntu.com gutsy-security/universe Translation-pt_BR
Ign http://security.ubuntu.com gutsy-security/universe Translation-pt
Ign http://security.ubuntu.com gutsy-security/universe Translation-en
Err http://packages.freecontrib.org gutsy InRelease

Err http://packages.freecontrib.org gutsy InRelease

Err http://packages.freecontrib.org gutsy Release.gpg
Não foi possível ligar a packages.freecontrib.org:http:
Err http://packages.freecontrib.org gutsy Release.gpg
Não foi possível ligar a packages.freecontrib.org:http:
Err http://archive.ubuntu.com gutsy/main Sources
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy/restricted Sources
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy/universe Sources
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy/multiverse Sources
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy/main amd64 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy/restricted amd64 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy/universe amd64 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy/multiverse amd64 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy/main i386 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy/restricted i386 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy/universe i386 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy/multiverse i386 Packages
404 Not Found [IP: 91.189.92.201 80]
Ign http://archive.ubuntu.com gutsy/main Translation-pt_BR
Ign http://archive.ubuntu.com gutsy/main Translation-pt
Ign http://archive.ubuntu.com gutsy/main Translation-en
Ign http://archive.ubuntu.com gutsy/multiverse Translation-pt_BR
Ign http://archive.ubuntu.com gutsy/multiverse Translation-pt
Ign http://archive.ubuntu.com gutsy/multiverse Translation-en
Ign http://archive.ubuntu.com gutsy/restricted Translation-pt_BR
Ign http://archive.ubuntu.com gutsy/restricted Translation-pt
Ign http://archive.ubuntu.com gutsy/restricted Translation-en
Ign http://archive.ubuntu.com gutsy/universe Translation-pt_BR
Ign http://archive.ubuntu.com gutsy/universe Translation-pt
Ign http://archive.ubuntu.com gutsy/universe Translation-en
Err http://archive.ubuntu.com gutsy-updates/main Sources
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-updates/restricted Sources
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-updates/universe Sources
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-updates/multiverse Sources
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-updates/main amd64 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-updates/restricted amd64 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-updates/universe amd64 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-updates/multiverse amd64 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-updates/main i386 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-updates/restricted i386 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-updates/universe i386 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-updates/multiverse i386 Packages
404 Not Found [IP: 91.189.92.201 80]
Ign http://archive.ubuntu.com gutsy-updates/main Translation-pt_BR
Ign http://archive.ubuntu.com gutsy-updates/main Translation-pt
Ign http://archive.ubuntu.com gutsy-updates/main Translation-en
Ign http://archive.ubuntu.com gutsy-updates/multiverse Translation-pt_BR
Ign http://archive.ubuntu.com gutsy-updates/multiverse Translation-pt
Ign http://archive.ubuntu.com gutsy-updates/multiverse Translation-en
Ign http://archive.ubuntu.com gutsy-updates/restricted Translation-pt_BR
Ign http://archive.ubuntu.com gutsy-updates/restricted Translation-pt
Ign http://archive.ubuntu.com gutsy-updates/restricted Translation-en
Ign http://archive.ubuntu.com gutsy-updates/universe Translation-pt_BR
Ign http://archive.ubuntu.com gutsy-updates/universe Translation-pt
Ign http://archive.ubuntu.com gutsy-updates/universe Translation-en
Err http://archive.ubuntu.com gutsy-backports/main Sources
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-backports/restricted Sources
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-backports/universe Sources
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-backports/multiverse Sources
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-backports/main amd64 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-backports/restricted amd64 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-backports/universe amd64 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-backports/multiverse amd64 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-backports/main i386 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-backports/restricted i386 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-backports/universe i386 Packages
404 Not Found [IP: 91.189.92.201 80]
Err http://archive.ubuntu.com gutsy-backports/multiverse i386 Packages
404 Not Found [IP: 91.189.92.201 80]
Ign http://archive.ubuntu.com gutsy-backports/main Translation-pt_BR
Ign http://archive.ubuntu.com gutsy-backports/main Translation-pt
Ign http://archive.ubuntu.com gutsy-backports/main Translation-en
Ign http://archive.ubuntu.com gutsy-backports/multiverse Translation-pt_BR
Ign http://archive.ubuntu.com gutsy-backports/multiverse Translation-pt
Ign http://archive.ubuntu.com gutsy-backports/multiverse Translation-en
Ign http://archive.ubuntu.com gutsy-backports/restricted Translation-pt_BR
Ign http://archive.ubuntu.com gutsy-backports/restricted Translation-pt
Ign http://archive.ubuntu.com gutsy-backports/restricted Translation-en
Ign http://archive.ubuntu.com gutsy-backports/universe Translation-pt_BR
Ign http://archive.ubuntu.com gutsy-backports/universe Translation-pt
Ign http://archive.ubuntu.com gutsy-backports/universe Translation-en
Baixados 4.291 B em 4min 20s (16 B/s)
Lendo listas de pacotes... Pronto
W: Falhou ao buscar http://packages.freecontrib.org/ubuntu/plf/dists/gutsy/InRelease

W: Falhou ao buscar http://packages.freecontrib.org/ubuntu/freecontrib/dists/gutsy/InRelease

W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/gutsy-security/main/source/Sources 404 Not Found [IP: 91.189.91.24 80]

W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/gutsy-security/restricted/source/Sources 404 Not Found [IP: 91.189.91.24 80]

W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/gutsy-security/universe/source/Sources 404 Not Found [IP: 91.189.91.24 80]

W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/gutsy-security/multiverse/source/Sources 404 Not Found [IP: 91.189.91.24 80]

W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/gutsy-security/main/binary-amd64/Packages 404 Not Found [IP: 91.189.91.24 80]

W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/gutsy-security/restricted/binary-amd64/Packages 404 Not Found [IP: 91.189.91.24 80]

W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/gutsy-security/universe/binary-amd64/Packages 404 Not Found [IP: 91.189.91.24 80]

W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/gutsy-security/multiverse/binary-amd64/Packages 404 Not Found [IP: 91.189.91.24 80]

W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/gutsy-security/main/binary-i386/Packages 404 Not Found [IP: 91.189.91.24 80]

W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/gutsy-security/restricted/binary-i386/Packages 404 Not Found [IP: 91.189.91.24 80]

W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/gutsy-security/universe/binary-i386/Packages 404 Not Found [IP: 91.189.91.24 80]

W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/gutsy-security/multiverse/binary-i386/Packages 404 Not Found [IP: 91.189.91.24 80]

W: Falhou ao buscar http://ppa.launchpad.net/openjdk-r/ppa/ubuntu/dists/utopic/main/binary-amd64/Packages 404 Not Found

W: Falhou ao buscar http://ppa.launchpad.net/openjdk-r/ppa/ubuntu/dists/utopic/main/binary-i386/Packages 404 Not Found

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy/main/source/Sources 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy/restricted/source/Sources 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy/universe/source/Sources 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy/multiverse/source/Sources 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy/main/binary-amd64/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy/restricted/binary-amd64/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy/universe/binary-amd64/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy/multiverse/binary-amd64/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy/main/binary-i386/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy/restricted/binary-i386/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy/universe/binary-i386/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy/multiverse/binary-i386/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-updates/main/source/Sources 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-updates/restricted/source/Sources 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-updates/universe/source/Sources 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-updates/multiverse/source/Sources 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-updates/main/binary-amd64/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-updates/restricted/binary-amd64/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-updates/universe/binary-amd64/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-updates/multiverse/binary-amd64/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-updates/main/binary-i386/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-updates/restricted/binary-i386/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-updates/universe/binary-i386/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-updates/multiverse/binary-i386/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-backports/main/source/Sources 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-backports/restricted/source/Sources 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-backports/universe/source/Sources 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-backports/multiverse/source/Sources 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-backports/main/binary-amd64/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-backports/restricted/binary-amd64/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-backports/universe/binary-amd64/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-backports/multiverse/binary-amd64/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-backports/main/binary-i386/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-backports/restricted/binary-i386/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-backports/universe/binary-i386/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://archive.ubuntu.com/ubuntu/dists/gutsy-backports/multiverse/binary-i386/Packages 404 Not Found [IP: 91.189.92.201 80]

W: Falhou ao buscar http://packages.freecontrib.org/ubuntu/plf/dists/gutsy/Release.gpg Não foi possível ligar a packages.freecontrib.org:http:

W: Falhou ao buscar http://packages.freecontrib.org/ubuntu/freecontrib/dists/gutsy/Release.gpg Não foi possível ligar a packages.freecontrib.org:http:

W: Falhou o download de alguns ficheiros de índice. Foram ignorados ou os antigos foram usados em seu lugar.

Já procurei vários assuntos sobre isso na internet, mas não encontrei nada. Eu sou um pouco novo ainda no Linux, e pesso por favor para que me ajudem com este problema! Eu estou precisando utilizar este comando. Desde já, agradeço.

Isso está uma bagunça! para que possam lhe ajudar, digita esses comandozinhos mágicos em seu terminal e posta eles aqui pro povo conferir.

$ sudo cat /etc/apt/sources.list > LISTA_DE_PACOTES.TXT

$ echo "" >> LISTA_DE_PACOTES.TXT

$ ls /etc/apt/sources.list.d/  >> LISTA_DE_PACOTES.TXT 

* copie tudo o que estiver neste arquivo LISTA_DE_PACOTES.TXT e cole aqui.

1- faça bkp seus arquivos
2- faça instalação limpa do ubuntu-14.04.3-lts

Tentei esses comandos agora, mas não apareceu nada, você pode detalhar um pouco mais o que devo fazer? Agradeço do mesmo jeito!

Isso deve funcionar, mas demora...
Agradeço

Vou repetir facilitando ainda mais:

$ cd

$ uname -a > RELATORIO.TXT

$ echo "" >> RELATORIO.TXT

$ sudo cat /etc/apt/sources.list >> RELATORIO.TXT

$ echo "" >> RELATORIO.TXT

$ ls /etc/apt/sources.list.d/  >> RELATORIO.TXT

$ gedit RELATORIO.TXT 

* se no último comando der o gedit como não encontrado ponha algum editor que sirva, tipo: leafpad, mousepad, kate, kwrite.

Se com o resultado a coisa estiver muito feia, a sugestão de fazer uma instalação limpa procede.

Apareceu o seguinte texto:

## Add comments (##) in front of any line to remove it from being checked.
## Use the following sources.list at your own risk.

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

## MAJOR BUG FIX UPDATES produced after the final release
deb http://archive.ubuntu.com/ubuntu gutsy-updates main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu gutsy-updates main restricted universe multiverse

## UBUNTU SECURITY UPDATES
deb http://security.ubuntu.com/ubuntu gutsy-security main restricted universe multiverse
deb-src http://security.ubuntu.com/ubuntu gutsy-security main restricted universe multiverse

## BACKPORTS REPOSITORY (Unsupported. May contain illegal packages. Use at own risk.)
deb http://archive.ubuntu.com/ubuntu gutsy-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu gutsy-backports main restricted universe multiverse

## PLF REPOSITORY (Unsupported. May contain illegal packages. Use at own risk.)
deb http://packages.freecontrib.org/ubuntu/plf/ gutsy free non-free
deb-src http://packages.freecontrib.org/ubuntu/plf/ gutsy free non-free
deb http://packages.freecontrib.org/ubuntu/freecontrib/ gutsy free non-free
deb-src http://packages.freecontrib.org/ubuntu/freecontrib/ gutsy free non-free

google-chrome.list
google-chrome.list.save
megasync.list
megasync.list.save
openjdk-r-ubuntu-ppa-utopic.list
openjdk-r-ubuntu-ppa-utopic.list.save
pipelight-ubuntu-stable-utopic.list
pipelight-ubuntu-stable-utopic.list.save
ricotz-ubuntu-unstable-utopic.list
ricotz-ubuntu-unstable-utopic.list.save
steam.list
steam.list.save
ubuntu-wine-ubuntu-ppa-utopic.list
ubuntu-wine-ubuntu-ppa-utopic.list.save
webupd8team-ubuntu-haguichi-utopic.list
webupd8team-ubuntu-haguichi-utopic.list.save
webupd8team-ubuntu-java-utopic.list
webupd8team-ubuntu-java-utopic.list.save

Vc está usando repositórios nde linux sem suporte há anos
E quando ainda era gnome2
Faça bkp antes de tudo
Pq chances de quebrar são grandes

Bom, eu não sei o que fazer agora, mas talvez seje uma ideia. E se eu instalar o Ubuntu 15.04? Eu uso o 14.10 Utopic Unicorn

Não é impossível, mas é muito improvável que você consiga atualizar essa versão antiga do Ubuntu para uma mais atual, minha sugestão é baixe a versão do UBUNTU LTS (14.0.3) em:

http://www.ubuntu.com/download/desktop

E escolha a arquitetura desejada no campo ( Choose your flavour )

Tá se realmente é o 14.10, pergunto: de onde sairam aqueles montes de gutsy no seu sources.list? será que foi algum duende? hiii mistério...

É possível fazer um backup em nuvem dos meus arquivos que tenho no meu OS?