There are many approaches to installing ATS. Please visit this link for details.
I have a free account with Cloud-9, which allows me to gain on-line access to Ubuntu boxes. With such a box, one can simply execute the following command-lines to install ATS in a couple minutes:
wget https://ats-lang.github.io/SCRIPT/C9-ATS2-install-cs320.sh bash -v C9-ATS2-install-cs320.sh source ~/.bashrc ## this one only needs to be executed once for all
By visiting ats-bucs320, one can browse the two installed directories of the names ATS2 and ATS2-contrib and the files contained in them. If re-installing ATS is ever needed, please remember that the installed directories ATS2 and ATS2-contrib should be removed before the steps outlined above for installation are repeated.
Please note that more scripts for installing ATS can be found on-line at Scripts_for_installing_ATS.