Often there's a link in Unix systems from the one directory to the
other, but you're not guaranteed it to be there. If you have admin
access to the system(s) you can create the link. Otherwise you are
always free to explicitly call the awk interpreter (with the path
implicitly defined through the PATH definition), i.e., instead of
making the script executable and calling it, say, as
call it always as
awk -f yourscript.awk yourdatafiles...