ernstki

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.

ernstki

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

ernstki

#!/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
##

ernstki

#!/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
##

ernstki

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;

ernstki

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

ernstki

import sys
import socket
import logging

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

port = None
startport = 8000
MAXTRIES = 10

ernstki

#!/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

ernstki

#!/usr/bin/env python3
##
##  Convert LDAP’s “number of 100-nanosecond intervals since January 1, 1601
##  (UTC)” timestamps to human-readable dates, in the local timezone. See
##  reference [1] for more details.
##
##  Does not use f-strings, so should work in any old Python 3.
##
##  Author:    Kevin Ernst <ernstki -at- mail.uc.edu>
##  Date:      13 Oct 2025

ernstki

#!/usr/bin/bash
HASHALG=sha256
files=()
args=(-$HASHALG)

while (( $# )); do
    case $1 in
        -*)
            for arg in "${args[@]}"; do
                if [[ $1 == $arg ]]; then