plan9port on Debian Jessie and now in 2020 Ubuntu / Pop_OS!

Update 26 Aug 2019, I don't know if this is too many now but I added one more library on for it to work. June 2020 - I'm now using Pop_OS! which is Ubuntu based - lots of new GCC warnings

apt-get install build-essential git libx11-dev libfreetype6-dev libfontconfig1-dev libxext-dev libxt-dev

# cd /usr/local
# git clone https://github.com/9fans/plan9port plan9
# cd plan9
# sh INSTALL