Munyiri Karobia kiwavi

Post-Installation Cheat Sheet for Arch Linux

This guide uses yay as the preferred AUR helper of choice.

Troubleshoot initial 'I have no Internet problems'

In case you did a fresh install and are now missing packages, yet cannot connect to the internet, simply boot via live-iso and arch-chroot into your system.

$ cryptsetup luksOpen /dev/nvme0n1p2 cryptroot      # only relevant in case of encrypted partition

$ mount /dev/mapper/cryptroot /mnt

Basics of the Unix Philosophy

source: https://homepage.cs.uri.edu/~thenry/resources/unix_art/ch01s06.html

Rule of Modularity: Write simple parts connected by clean interfaces.
Rule of Clarity: Clarity is better than cleverness.
Rule of Composition: Design programs to be connected to other programs.
Rule of Separation: Separate policy from mechanism; separate interfaces from engines.
Rule of Simplicity: Design for simplicity; add complexity only where you must.
Rule of Parsimony: Write a big program only when it is clear by demonstration that nothing else will do.

Configuring Emacs for react, es6, and flow

For a while, JSX and new es6 syntax had flaky support in emacs, but there's been huge work on a lot of packages. Using emacs for JavaScript with React, ES6, and Flow (or Typescript, etc) is really easy and powerful in Emacs these days.

This is how you can work on modern web development projects with full support for tooling like JSX, Flow types, live eslint errors, automatic prettier.js formatting, and more.

Set up `web-mode`

web-mode provides most of the underlying functionality, so a huge shout-out to the maintainer(s) there.

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

-E: will describe the underlaying queries of the \ commands (cool for learning!)
-l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

	# remove specific file from git cache
	git rm --cached filename

	# remove all files from git cache
	git rm -r --cached .
	git add .
	git commit -m ".gitignore is now working"