If you already have par2 installed use "sudo apt-get remove --purge par2" This will remove it as its not the same version (single core). For 64 bit Ubuntu: Code: wget http://www.chuchusoft.com/par2_tbb/par2cmdline-0.4-tbb-20100203-lin64.tar.gz tar -zxvf par2cmdline-0.4-tbb-20100203-lin64.tar.gz rm par2cmdline-0.4-tbb-20100203-lin64.tar.gz cd par2cmdline-0.4-tbb-20100203-lin64 rm COPYING rm README_FIRST.txt sudo cp * /usr/local/bin/ cd ~ rm -rf par2cmdline-0.4-tbb-20100203-lin64 sudo chmod 777 /usr/local/bin/par2 sudo chmod +x /usr/local/bin/par2 For 32 bit Ubuntu: Code: wget http://www.chuchusoft.com/par2_tbb/par2cmdline-0.4-tbb-20090203-lin32.tar.gz tar -zxvf par2cmdline-0.4-tbb-20090203-lin32.tar.gz rm par2cmdline-0.4-tbb-20090203-lin32.tar.gz cd par2cmdline-0.4-tbb-20090203-lin32 rm COPYING rm README_FIRST.txt sudo cp * /usr/local/bin/ cd ~ rm -R par2cmdline-0.4-tbb-20090203-lin32 sudo chmod 777 /usr/local/bin/par2 sudo chmod +x /usr/local/bin/par2 This will work great with SABnzbd. Follow this guide to fine tune your SABnzbd setup.