Note that `/proc/$pid/environ` has null bytes between the entries, so it's not very readable if you just `cat` it. So you want to filter its content, e.g.:

Note that `/proc/$pid/environ` has null bytes between the entries, so it's not very readable if you just `cat` it. So you want to filter its content, e.g.: tr "\0" "\n" < /proc/$pid/environ