Just a second before closing my question as duplicated, I want to say I have already looked at the other similar questions and didnt find any appropriate answer :(.

I have a clean set up of Ubuntu 10.10, and I am trying to install packeges by apt-get comamnd. But I cann't do it - E: Unable to locate package error is shown. I am trying the following commands:

sudo apt-get install build-essential,
sudo apt-get insatll update etc.

I have looked in another qouestions and saw that it depends on the sources.list file - so I am posting its content:

#deb cdrom:[Ubuntu 10.10 _Maverick Meerkat_ - Release amd64 (20101007)]/ maverick main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to

# newer versions of the distribution.



deb http://il.archive.ubuntu.com/ubuntu/ maverick main restricted

deb-src http://il.archive.ubuntu.com/ubuntu/ maverick main restricted



## Major bug fix updates produced after the final release of the

## distribution.

deb http://il.archive.ubuntu.com/ubuntu/ maverick-updates main restricted

deb-src http://il.archive.ubuntu.com/ubuntu/ maverick-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://il.archive.ubuntu.com/ubuntu/ maverick universe

deb-src http://il.archive.ubuntu.com/ubuntu/ maverick universe

deb http://il.archive.ubuntu.com/ubuntu/ maverick-updates universe

deb-src http://il.archive.ubuntu.com/ubuntu/ maverick-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://il.archive.ubuntu.com/ubuntu/ maverick multiverse

deb-src http://il.archive.ubuntu.com/ubuntu/ maverick multiverse

deb http://il.archive.ubuntu.com/ubuntu/ maverick-updates multiverse

deb-src http://il.archive.ubuntu.com/ubuntu/ maverick-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://il.archive.ubuntu.com/ubuntu/ maverick-backports main restricted universe multiverse

# deb-src http://il.archive.ubuntu.com/ubuntu/ maverick-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 maverick partner

# deb-src http://archive.canonical.com/ubuntu maverick 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 maverick main

deb-src http://extras.ubuntu.com/ubuntu maverick main



deb http://security.ubuntu.com/ubuntu maverick-security main restricted

deb-src http://security.ubuntu.com/ubuntu maverick-security main restricted

deb http://security.ubuntu.com/ubuntu maverick-security universe

deb-src http://security.ubuntu.com/ubuntu maverick-security universe

deb http://security.ubuntu.com/ubuntu maverick-security multiverse

deb-src http://security.ubuntu.com/ubuntu maverick-security multiverse

can anyone please help me?
Thanks!!