The section on find after pipes has also not aged well. I can see why GNU and later GNU/Linux replaced most of the old Unices (I mean imagine having a find that

The section on find after pipes has also not aged well. I can see why GNU and later GNU/Linux replaced most of the old Unices (I mean imagine having a find that doesn't follow symlinks!). If I may, a bit of code golf on the problem of "print all .el files without a matching .elc" find . -name '*.el' | while read el; do [ -f "${el}c" ] || echo $el; done Of course this uses the dreaded pipes and doesn't support the extremely common filenames with a newline in them, so let's do it without them find . -name '*.el' -exec bash -c 'el=$0; elc="${el}c"; [ -f "$elc" ] || echo "$el"' '{}' ';'