The shell scripts distributed with the official nand2tetris suite aren't the most orthodox ones.
A while ago I created a fork with mostly bug-fixes + a couple of new features. It contains improved shell scripts + .desktop files, which are usable on linux systems. You can find the release here:
https://github.com/itoshkov/nand2tetris-emu/releases/tag/v2.6.2You might also be able to use the desktop and shell files with the official release, but I haven't tested this.