Refer to Ansys17 page for any missing pre-installation steps. This page only demonstrate the installation with screen-shots.
Download the software from
http://ftp.cc.iitk.ac.in/Linux/Ansys/
Run the setup by following set of commands
$ tar -xvf Ansys19_2.tar $ cd Ansys19_2 $ chmod 755 INSTALL $ ./INSTALL