Kevin Ernst ernstki

`flatpak-du`: like `du` for Flatpaks

This utility is intended to produce more consistent and useful output than flatpak list, while papering over some of the more irritating quirks of flatpak list --show-details, such as:

showing completely different columns depending on whether standard out is a terminal or not
inability to control column headers; shown when stdout is a terminal, hidden otherwise

GNU Stow doesn't like to replace (or remove) cache files like share/glib-2.0/gschemas.compiled and share/icons/hicolor/icon-theme.cache.

If another package installed those, but the package you're trying to stow has its own, you'll get an error like this:

$ sudo stow seahorse-41.0/
WARNING! stowing seahorse-41.0 would cause conflicts:
  * existing target is neither a link nor a directory: share/glib-2.0/schemas/gschemas.compiled
  * existing target is neither a link nor a directory: share/icons/hicolor/icon-theme.cache
All operations aborted.

Put these in /etc/ufw/applications.d and use them like this:

sudo ufw allow from 192.168.1.0/24 to any app lms
sudo ufw allow from 192.168.1.0/24 to any app barrier

References

What ports does Synergy use? - symless.com

elementary OS's Contractor service uses standard Linux .desktop files (spec) with a .contract extension to provide context (secondary-click) menu entries for specific MIME types. System-wide apps put these in /usr/share/contractor, whatever the Flatpak version of that is, and you can create your own in ~/.local/share/contractor. Below are some examples.

Contractor actions for all MIME types

If you want a specific Contractor action to apply to all filetypes, including device special files, directories, whatever, you can exploit the ! (exclusion) operator in the MimeType key, like this:

MimeType=!nothing;

Multi-line text replacement with sed

Original question: "Catch an entire function with grep" on Stack Overflow

It is possible to use (GNU) grep to do multiline matching[^fn1], but you're probably making more work for yourself that way, because sed can do basically everything grep can plus make replacements.

Using grep -zoP to do multiline matching is fundamentally the same trick as what's proposed below: turning your file into one long string, separated by

	#!/usr/bin/gawk -E
	##
	## List the top N directories (N levels deep) by cumulative file size
	##
	## Usage:
	##
	## find . -type f -printf "%p\t%s\n" \| gawk -E bigdirs [options]
	##
	## # or, if `bigdirs` is in your search path
	## find some/path -type f -printf "%p\t%s\n" \| bigdirs [options]

	#!/usr/bin/env python3
	##
	## watchme.py - monitor *.py files or a given path and re-run 'python <path>'
	##
	## Author: Kevin Ernst
	## Date: 4 February 2026
	## License: Apache License Version 2.0
	## (https://github.com/gorakhargosh/watchdog/blob/master/LICENSE)
	## Homepage: https://gist.github.com/ernstki/759383313185aae343bc87b989c44241
	##

	#!/usr/bin/env perl
	##
	## Unwrap Outlook "safelinks" URLs passed on stdin or as arguments
	##
	## Author: Kevin Ernst <ernstki@mail.uc.edu>
	## Date: 20 December 2024; updated 6 December 2025
	## License: ISC or WTFPL, at your option
	## Homepage: https://gist.github.com/ernstki/c1408d1f938276f36b77047a4835a3de
	## Bugs: Won't handle quoted printable mails or links broken across lines
	##

	import sys
	import socket
	import logging

	logging.getLogger().setLevel(logging.DEBUG)

	port = None
	startport = 8000
	MAXTRIES = 10

	#!/usr/bin/env python3
	##
	## flatpak-orphans.py - lists orphaned Flatpak data in ~/.var/app
	##
	## Author: Kevin Ernst <ernstki -at- mail.uc.edu>
	## Date: 16 October 2025
	## License: MPL 2.0
	## Homepage: https://gist.github.com/ernstki/f3e279e8a050c2df94e9fcfd69d67c2f
	##
	## Originally based on `main.py` from Flatsweep by giantpinkrobots[1], but

Kevin Ernst ernstki

flatpak-du: like du for Flatpaks

References

Contractor actions for all MIME types

Multi-line text replacement with sed

`flatpak-du`: like `du` for Flatpaks