I'm sorry for asking this but I couldn't find anything of help. I'm asked to download the script "install_esoreflex" (ftp://ftp.eso.org/pub/dfs/reflex/install_esoreflex) and then execute the following commands:
chmod u+x install_esoreflex
./install_esoreflex
But I'm not sure if "download the script" means download as a text file or copy and paste the script on a terminal.