mikemcduffie

Run arbitrary application from terminal on MacOS

Sometimes, it is convenient to have possibility to start/run any application (like your internet browser or text editor) directly from your terminal. Most of these applications however do not create shortcut for easy run from terminal during their installation. Below is short manual how to create this shortcut manually.

Steps

Open terminal (cmd + space --> type terminal)
Navigate to a directory where you have your code/scripts. For example ~/code or /usr/local/bin:

Configuration of `ssh` connection

Unix and MacOS

Let's say we want to configure an ssh connection between machine alpha and beta.

Go to your home folder at machine alpha:

$ cd ~

Useful string manipulation examples for bash and zsh

I need very often to modify filenames or replace/delete their parts across huge number of files. I was using sed command for these purposes but recently I have found out that all these tasks can be easily done directly in bash (or zsh) because both of them support so called string manipulation operations.

String manipulations

Define some example string:

$ file=some_file_name.txt

	import os.path
	import shutil
	import hashlib
	import logging

	# Support both Python 2 and 3 urllib2 importing
	try:
	from urllib.request import urlopen, Request
	except ImportError:
	from urllib2 import urlopen, Request

	# -- coding: utf-8 --

	morse_alphabet = {
	"А" : ".-",
	"Б" : "-...",
	"В" : ".--",
	"Г" : "--.",
	"Д" : "-..",
	"Е" : ".",
	"Ж" : "...-",

	"""
	Regular expressions for matching emoji sequences.

	For parsing single emoji, use either

	re.match(EMOJI_SEQUENCE, string)
	# or
	EMOJI_REGEXP.match(string)

	To match multiple emojis or custom patterns, insert `EMOJI_SEQUENCE` into pattern:


	#!/bin/bash

	# We can find the index of the item in the array by extracting the key, finding the lines with
	# 'string' in them, and then finding the search string.
	cd /System/Volumes/Data/.Spotlight-V100

	search_string=$1

	let index="`plutil -extract Exclusions xml1 -o - VolumeConfiguration.plist \| grep string \| grep -wn "${search_string}" \| cut -d ':' -f 1` - 1"

	!/bin/bash

	launchctl stop com.apple.metadata.mds && launchctl start com.apple.metadata.mds

	vers=$( sw_vers \| grep BuildVersion \| awk '{print substr($2,0,2)}' )

	sdir="/.Spotlight-V100"

	if [[ "${vers}" > "18" ]]; then
	sdir="/System/Volumes/Data${sdir}"

	#!/bin/sh
	# Extract subtitles from each MKV/MP4 file in the given directory
	# [updated 2024-01-09 by FurloSK]
	# Permanent gist address: https://gist.github.com/FurloSK/7f52303a10ab7478e3cddfe4bcc50881
	#
	# ===== Usage =====
	# extractSubtitles.sh [-i] [<fileOrDirectory>]
	# -i
	# Supplying this option will skip extraction and only print information about subtitles in file
	# <fileOrDirectory>

	#!/bin/bash

	# Script: GitHubFileDownloader.sh
	# Author: electblake <https://github.com/electblake>
	# Version: 1.0
	# Description: This script converts a GitHub repository file URL to its GitHub API URL for file contents, checks if the user is logged into GitHub CLI, and downloads the file.
	# Source: https://gist.github.com/electblake/7ef3a63e20b3c8db67d9d66f7021d727
	# Credits:
	# - Inspired by answers on: https://stackoverflow.com/questions/9159894/download-specific-files-from-github-in-command-line-not-clone-the-entire-repo
	# - Used "Bash Script" GPT by Widenex for script creation assistance.