Setting up Hashcat for CPU Hacking on Debian Hashcat for CPU hacking turned out to be an adventure that almost failed, this is a quick post of the steps needed as a referece if I need to repeat this process again. One could setup run John The Ripper (simpler setup) however I decided to use Hashcat as it's GPU cracking is faster compared to JtR and so down the line I won't have to re-learn. I've have tried the Intel OpenCL 5.0 and 18.1 runtimes but they are not supported on our CPU Pentium(R) Dual-Core CPU E5400 Install Hashcat direclty https://hashcat.net/hashcat/ Install AMD OpenCL CPU package, it has been discounteued but you can get it here. tar xvfj AMD-APP-SDKInstaller-v3.0.130.136-GA-linux64.tar.bz2 ./AMD-APP-SDK-v3.0.130.136-GA-linux64.sh ./clinfo ./hashcat64.bin -b --force If the above clinfo or hashccat64.bin fail see https://askubuntu.com/q/821341 , and confirm `/etc/ld.so.conf.d/AMDAPPSDK.conf` is proper, and also you might need to set your LD