obrigado pela ajuda
na verdade adicionei a penultima linha e a ultima e editei a primeira
ficou assim
# deb cdrom:Ubuntu 7.10 / gutsy main restricted
# See
http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
# Line commented out by installer because it failed to verify:
deb
http://br.archive.ubuntu.com/ubuntu/ gutsy main restricted
# Line commented out by installer because it failed to verify:
# deb-src
http://br.archive.ubuntu.com/ubuntu/ gutsy main restricted
## Major bug fix updates produced after the final release of the
## distribution.
# Line commented out by installer because it failed to verify:
deb
http://br.archive.ubuntu.com/ubuntu/ gutsy-updates main restricted
# Line commented out by installer because it failed to verify:
# deb-src
http://br.archive.ubuntu.com/ubuntu/ gutsy-updates main restricted
## 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
## universe WILL NOT receive any review or updates from the Ubuntu security
## team.
# Line commented out by installer because it failed to verify:
deb
http://br.archive.ubuntu.com/ubuntu/ gutsy universe
# Line commented out by installer because it failed to verify:
# deb-src
http://br.archive.ubuntu.com/ubuntu/ gutsy universe
# Line commented out by installer because it failed to verify:
deb
http://br.archive.ubuntu.com/ubuntu/ gutsy-updates universe
# Line commented out by installer because it failed to verify:
# deb-src
http://br.archive.ubuntu.com/ubuntu/ gutsy-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.
# Line commented out by installer because it failed to verify:
deb
http://br.archive.ubuntu.com/ubuntu/ gutsy multiverse
# Line commented out by installer because it failed to verify:
# deb-src
http://br.archive.ubuntu.com/ubuntu/ gutsy multiverse
# Line commented out by installer because it failed to verify:
deb
http://br.archive.ubuntu.com/ubuntu/ gutsy-updates multiverse
# Line commented out by installer because it failed to verify:
# deb-src
http://br.archive.ubuntu.com/ubuntu/ gutsy-updates multiverse
## Uncomment the following two lines to add software from the 'backports'
## repository.
## 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://br.archive.ubuntu.com/ubuntu/ gutsy-backports main restricted universe multiverse
# deb-src
http://br.archive.ubuntu.com/ubuntu/ gutsy-backports main restricted universe 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/ gutsy partner
# deb-src
http://archive.canonical.com/ubuntu/ gutsy partner
# Line commented out by installer because it failed to verify:
deb
http://security.ubuntu.com/ubuntu/ gutsy-security main restricted
# Line commented out by installer because it failed to verify:
# deb-src
http://security.ubuntu.com/ubuntu/ gutsy-security main restricted
# Line commented out by installer because it failed to verify:
deb
http://security.ubuntu.com/ubuntu/ gutsy-security universe
# Line commented out by installer because it failed to verify:
# deb-src
http://security.ubuntu.com/ubuntu/ gutsy-security universe
# Line commented out by installer because it failed to verify:
deb
http://security.ubuntu.com/ubuntu/ gutsy-security multiverse
# Line commented out by installer because it failed to verify:
# Cinelerra
# deb
http://giss.tv/~vale/ubuntu64 ./
nao sei se esta certo mas funcionou