For 12.04 from my personal notes..
apt-get update
apt-get dist-upgrade - (answer yes)
apt-get install build-essential libssl-dev openssl git libgmp-dev
git clone https://github.com/tandyuk/jhPrimeminer.git
cd jhPrimeminer
make
It was the Bitcointalk forum that inspired us to create Bitcointalksearch.org - Bitcointalk is an excellent site that should be the default page for anybody dealing in cryptocurrency, since it is a virtual gold-mine of data. However, our experience and user feedback led us create our site; Bitcointalk's search is slow, and difficult to get the results you need, because you need to log in first to find anything useful - furthermore, there are rate limiters for their search functionality.
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