E: Unable to locate package cvs

[sajerg281]

I want to install cvs using the command sudo apt-get install cvs but gives the error "E: Unable to locate package cvs".

The output of the command cat /etc/apt/sources.list is

#deb cdrom:[Ubuntu 12.10 _Quantal Quetzal_ - Release amd64+mac (20121017.3)]/ quantal main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
# deb http://de.archive.ubuntu.com/ubuntu/ quantal main restricted
#deb-src http://de.archive.ubuntu.com/ubuntu/ quantal main restricted
## Major bug fix updates produced after the final release of the
## distribution.
# deb http://de.archive.ubuntu.com/ubuntu/ quantal-updates main restricted
#deb-src http://de.archive.ubuntu.com/ubuntu/ quantal-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://de.archive.ubuntu.com/ubuntu/ quantal universe
#deb-src http://de.archive.ubuntu.com/ubuntu/ quantal universe
# deb http://de.archive.ubuntu.com/ubuntu/ quantal-updates universe
#deb-src http://de.archive.ubuntu.com/ubuntu/ quantal-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://de.archive.ubuntu.com/ubuntu/ quantal multiverse
#deb-src http://de.archive.ubuntu.com/ubuntu/ quantal multiverse
# deb http://de.archive.ubuntu.com/ubuntu/ quantal-updates multiverse
#deb-src http://de.archive.ubuntu.com/ubuntu/ quantal-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://de.archive.ubuntu.com/ubuntu/ quantal-backports main restricted universe multiverse
#deb-src http://de.archive.ubuntu.com/ubuntu/ quantal-backports main restricted universe multiverse

# deb http://security.ubuntu.com/ubuntu quantal-security main restricted
#deb-src http://security.ubuntu.com/ubuntu quantal-security main restricted
# deb http://security.ubuntu.com/ubuntu quantal-security universe
#deb-src http://security.ubuntu.com/ubuntu quantal-security universe
# deb http://security.ubuntu.com/ubuntu quantal-security multiverse
#deb-src http://security.ubuntu.com/ubuntu quantal-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 quantal partner
deb-src http://archive.canonical.com/ubuntu quantal 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 quantal main
deb-src http://extras.ubuntu.com/ubuntu quantal main
#deb http://archive.canonical.com/ubuntu quantal partner
deb-src http://archive.canonical.com/ubuntu quantal partner

the output of the command sudo apt-get update is

Hit http://extras.ubuntu.com quantal Release.gpg
Hit http://extras.ubuntu.com quantal Release
Hit http://archive.canonical.com quantal Release.gpg
Hit http://archive.canonical.com quantal Release
Hit http://extras.ubuntu.com quantal/main Sources
Hit http://extras.ubuntu.com quantal/main amd64 Packages
Hit http://archive.canonical.com quantal/partner Sources
Hit http://extras.ubuntu.com quantal/main i386 Packages
Hit http://archive.canonical.com quantal/partner amd64 Packages
Hit http://archive.canonical.com quantal/partner i386 Packages
Ign http://extras.ubuntu.com quantal/main Translation-en_US
Ign http://archive.canonical.com quantal/partner Translation-en_US
Ign http://extras.ubuntu.com quantal/main Translation-en
Ign http://archive.canonical.com quantal/partner Translation-en
Reading package lists... Done

how can I solve the problem?
thanks,

[nerdtron]

Ubuntu 12.10 has reached end-of-life and is no longer supported. It is not a Long-Term-Support release.
See more: https://wiki.ubuntu.com/Releases

You should probably upgrade to a newer version, 14.04 and 12.04 are LTS releases.