Installation is fairly straightforward. For a cpu-only laptop the process was:

• Read https://hashcat.net/hashcat/ and build from the git repo
• Install lsb-core
• Install the driver from http://registrationcenter-download.intel.com/akdlm/irc_nas/9019/opencl_runtime_16.1_x64_ubuntu_5.2.0.10002.tgz
• Run hashcat -I and hashcat -b to check that it works