sips

macOS has long included a command line tool called sips. It’s a comprehensive image manipulation tool

$ sips --help

Get dpi

$ sips --getProperty dpiHeight --getProperty dpiWidth image-20210910165854169.png
/Users/matejkafr/Documents/Htl/Doc/Documentation/pandoc/MDtoPDF/tmp/image-20210910165854169.png
  dpiHeight: 300.000
  dpiWidth: 300.000

Set the dpi:

$ sips <file> -s dpiHeight <dpi> -s dpiWidth <dpi>
$ sips image-20210910165854169.png -s dpiHeight 600 -s dpiWidth 600 -o image_600.png

Hinweis:

DPI haben keine Auswirkungen in HTML Browsern
Bei LaTeX wird das Bild kleiner wenn die DPI erhöht werden.

Image Crop

--cropToHeightWidth pixelsH pixelsW
		Crop image to fit specified size.

--cropOffset offsetY offsetH
		Crop offset from top left corner.

sips --getProperty pixelWidth --getProperty pixelHeight Mairboeck_Fabian.jpg

cp Mairboeck_Fabian.jpg Mairboeck_Fabian_.jpg;sips --cropOffset 25 40 --cropToHeightWidth 250 170 Mairboeck_Fabian_.jpg

cp *.jpg build;find ./build -type f -name '*.jpg' -maxdepth 1 \
 -exec sips --cropOffset 25 40 --cropToHeightWidth 250 170 {} ';'

wakeonlan

brew install wakeonlan

.zshenv

# ~/.zshenv
PATH=$PATH:~/Documents/Htl/lib/bin
CDPATH=.:~/Documents/Htl

What should/shouldn’t go in .zshenv, .zshrc, .zlogin, .zprofile, .zlogout?
Quick directory navigation in the bash shell](https://unix.stackexchange.com/a/31179)

Homebrew

macOS installs Homebrew GNU tools

Small Sharp Software Tools

How to replace Mac OS X utilities with GNU core utilities?

$ brew install coreutils findutils gnu-tar gnu-sed gawk gnu grep
# Die GNU Utilities beginnen alle mit einem g (ggrep, gawk, gsed, ...)

$ brew install pandoc
$ brew install node

Python

$ brew install python

Pandas für M1 [*]:

$ pip3 install cython
$ pip3 install numpy --no-use-pep517
$ pip3 install pandas --no-use-pep517
$ pip3 install matplotlib