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## 4 Requirements

Htmlfontify has a couple of external requirements:

- GNU Emacs 20.7+ or 21.1+

  Other versions may work—these have been used successfully by the author. If you intend to use Htmlfontify in batch mode, 21.1+ is pretty much required. The author does not know if XEmacs, NTemacs, or J.Random Emacs will run Htmlfontify, but reports/patches/bags of money are always welcome.

- A copy of etags (exuberant-ctags or GNU etags). Htmlfontify attempts to autodetect the version you have and customize itself accordingly, but you should be able to override this.

  See: Customization

- A copy of find (e.g., GNU find) that provides the `-path` predicate.

  You may be able to work around this with a suitable clever shell command and the customization entry: hfy-find-cmd

- A copy of sed (e.g., GNU sed).
- A copy of the `file` command.