Philip A Senger psenger

Exact Copy

Copy everything from one directory to another directory on a different volume in Unix, while retaining permissions, ownership, structure, as well as all creation and modification dates (timestamps)

When Destination is Fresh

rsync -avHAX --numeric-ids /source/directory/ /destination/directory/

Caution - removes destination files

To find all files with the extensions .yaml or .yml recursively in Unix / Mac OSX, you can use the find command with this pattern:

find . \( -name '*.yaml' -o -name '*.yml' \)

How to "Action" when a Mac Reboots

If your Mac reboots, and you want to be notified that it has rebooted.

How to launch a Script when your mac reboots

Create a .plist file at /Library/LaunchDaemons/com.YOUR_COMPANY.rebootnotification.plist. Change YOUR_COMPANY to your domain name in the .plist file. The contents will look like the following, change /path/to/your/script.sh to your script. This .plist file and the /path/to/your/script.sh should be owned by root:wheel my advise is to make it only executable by root. I take no responsiblities for any Security issues.

Network Quality

networkQuality tests the upload/download capacity and upload/download responsiveness in parallel by default

% networkquality -v
Downlink: capacity 0.000 Mbps, responsiveness 0 RPM (828.687 KB, 1 flows) - Uplink: capacity 5.295 Mbps, responsiveness 0 RPM (191.997 KB, 1 flows
Downlink: capacity 80.816 Mbps, responsiveness 960 RPM (13.951 MB, 2 flows) - Uplink: capacity 6.876 Mbps, responsiveness 960 RPM (1.187 MB, 2 flo
Downlink: capacity 83.615 Mbps, responsiveness 989 RPM (16.483 MB, 2 flows) - Uplink: capacity 7.778 Mbps, responsiveness 989 RPM (1.687 MB, 2 flo

SIPS (Scriptable Image Processing System)

SIPS (Scriptable Image Processing System) is a command-line utility available on macOS that enables users to perform various image manipulation tasks directly from the command line. It supports a wide range of image file formats, including JPEG, PNG, TIFF, GIF, and more

Example usage:

Scale an image (without aspect ratio): sips -z width height input_image --out output_image
Scale an image (maintain aspect ratio): sips -z 800 0 original.jpg --out scaled.jpg
Query image properties: sips -g dpiHeight -g dpiWidth image.jpg


	/**
	* Sends a String of data to the Mac OSX Buffer, this is very helpful if
	* you are doing something in scratch pad and want to copy it somewhere.
	*
	* this beats Pipe-ing the output to pbcopy directly.
	*
	* @param {string} data - Required UTF-8 String to be copied to the buffer.
	*
	* @return {void}

	const https = require('https')
	const http = require('http')
	const readline = require('readline')
	const url = require('url')

	function httpRequest(options, data) {
	return new Promise((resolve, reject) => {
	const parsedUrl = url.parse(options.hostname)
	const protocol = parsedUrl.protocol
	const request = (protocol && protocol.startsWith('https')) ? https.request : http.request

	/**
	* Function: moveZeros
	* Description: This function moves all zeros in an array to the end of the array, while
	* preserving the order of the other elements. Without creating a new Array.
	* Note: this uses a common two-pointer method, is O(n) and does not create a new array
	* @param {Array} nums - The input array.
	* @return {Array} The modified input array.
	*/
	const moveZeros = (nums) => {
	let left = 0

	def auto_str(cls):
	def __str__(self):
	return '%s(%s)' % (
	type(self).__name__,
	', '.join('%s=%s' % item for item in vars(self).items())
	)

	cls.__str__ = __str__
	return cls

	## One liner to remove Duplicates from an array and keep order.

	old = ['a', 'b', 'a', 'c', 'b', 'a']
	new = list(dict.fromkeys(old).keys())