Blockchain Frozen

[Distribution]

I'm running Bitcoin on Ubuntu 12.04 and the blockchain has stopped downloading. I'm sure this problem has been posed before (actually, I think I had this problem before on a Windows machine). From what I remember, someone told me to delete the blockchain file. What should I do with Ubuntu? And if that is the solution, what's the blockchain file called?

[deepceleron]

Close Bitcoin, open terminal

cd ~/.bitcoin/
mv blk0001.dat blk0001.old
mv blkindex.dat blkindex.old
wget http://eu1.bitcoincharts.com/blockchain/blockchain-2012-06-20.tar
tar -xvf blockchain-2012-06-20.tar

[Distribution]

Close Bitcoin, open terminal

cd ~/.bitcoin/
mv blk0001.dat blk0001.old
mv blkindex.dat blkindex.old
wget http://eu1.bitcoincharts.com/blockchain/blockchain-2012-06-20.tar
tar -xvf blockchain-2012-06-20.tar

Awesome, thanks. Doing it now. The size of the blockchain is killer, that's a big file.