Lets face it, John the Ripper has been around a long time and the reason its been around a long time is because its damn good at cracking passwords. Yea, hashcat and oclhashcat are great for gpu cracking, but it doesn’t support as many algorithms as JTR. So, imagine my surprise when I fire up John The Ripper on backtrack 5 64 bit and find out it is using a single CPU. That is letting a potential 75% of my system sit there wanting to do something. Luckily the fix is easier than fixing a sandwich.
If you already have jtr installed, you may want to see my john tips article.
First, lets grab the jumbo sourcecode….