When I try to run the downloaded file, it will not open because the character encoding of the downloaded file cannot be recognised. I have downloaded the file 3 times - with the same result.

Also, when downloading the file, it says it is a 3.1GB download but arrives as 3.3GB file.

Is there a problem with the GOG .sh file? Any other ideas? FWIW I do have Tex 2 and 3 running fine on Linux.

Many thanks for your reply. My MD5 was fine but re-reading your reply made me realise I had forgotten to change the permissions to execute the file as a program. I'm on my way now.