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I wanted to install a postgres module in ubuntu similar to this. So I ran a sudo apt-get update and that ran fine. Next, I did a sudo apt-get install postgresql-9.2-prefix just like the instructions stated, but all I got was this error:

sudo apt-get install postgresql-9.2-prefix
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package postgresql-9.2-prefix
E: Couldn't find any package by regex 'postgresql-9.2-prefix'

Could someone be kind enough to tell how to locate the package? By some chance, if the package isn't located in ubuntu's repo, how do I know what repo to add? Isn't that github thing a repo already? So theoretically I could add it in my software sources? (I could be totally wrong though lol.) I am using Ubuntu 11.10.

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check here, hope it helps. – Lorenzo Von Matterhorn Sep 18 '13 at 18:06

You'll have a hard time installing anything on Ubuntu 11.10, since it is no longer supported. Unless you switched repositories, I doubt apt will work at all. I suggest upgrading to Ubuntu 12.04 (still supported for many years) and installing postgresql-9.1-prefix.

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