Symbolic links

Typing the following in bash:

while :;do ls --color -w 44 -L a/p/g;ln -snf `ls -d -- \`l\
s -l a/p/f/t\``/a/p/d/v;ln -snf `ls -d -- \`ls -l a/p/b/t\`
`/a/u;ln -snf `ls -d -- \`ls -l a/u\``/a/p;done 2>e # linus

will create a virtual machine whose programs are expressed as directory trees containing nothing but symbolic links.

Note that, apart from the while loop, the only commands used in the above expression are ln and ls.

The following is an implementation of Conway's Game Of Life:

Program output:

The directory tree (source code):