When working with erlang, we can use old version to run our erlang app which are not yet upgraded.This multiple erlang version run like python env if you come from python.So in erlang we using Kerl which can switch to multiple erlang version at runtime. So here we go.We are using Debian 10.x buster. Some prerequisite before able to finish are install the dev tools.# apt-get install build-essential autoconf libncurses5-dev openssl libssl-dev fop xsltproc...
