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This page lists my personal preferences to set up proper command line for Mac OS X.

Change default shell to ZSH

Current default for Mac OS X Catalina, offers much better customizations that Bash.

chsh -s /bin/zsh

Install Homebrew

# basic pfctl control
# ==
# Related: http://www.OpenBSD.org
# Last update: Tue Dec 28, 2004
# ==
# Note:
# this document is only provided as a basic overview
# for some common pfctl commands and is by no means
# a replacement for the pfctl and pf manual pages.