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when I try 'apt-get update' on 12.10 I get:

...

Err http://archive.ubuntu.com quantal-security/main Translation-en_US

Connection failed

Err http://archive.ubuntu.com quantal-security/main

Connection failed

...

Several times ago everything worked. I haven't changed anything since then. I didn't find the solution of the problem.

UP

yes, server is connected to the internet and available via http and ssh. Sites on the server work fine too. I just try to upgrade sevrer dists and I enter 'apt-get update' for getting fresh index. When I try to install any package I also get a problem . For example installing curl:

root@srv ~ # apt-get install curl
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package curl is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or is
only available from another source

E: Package 'curl' has no installation candidate

Problem SOLVED

by commenting line:

Acquire::http::Proxy "http://server_ip:8123";

in /etc/apt/apt.conf

It is appeared after installing polipo package.

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Please put the Solution as an answer and select it as the accepted answer. – user68186 Dec 3 '12 at 20:15
I tried, but '8 hours' restriction not allow to make it. Maybe later – sx00 Dec 3 '12 at 20:18

closed as too localized by fossfreedom♦ Dec 3 '12 at 20:42

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