archive type not supported message when trying to open arduino-1.8.5-linux64.tar(2)
Change the filename to arduino-1.8.5-linux64.tar.
Evidently you downloaded it twice and the (2) was added to differentiate the two files.
Thanks! That worked and i opened install.sh and it just showed the code , it didn't run. As you can tell i'm new to this.
Are you using Linux?
open Terminal window
go the directory where the program was unzipped
type ./install and hit Enter key
.