Emacs

Emacs is great and sucks too. NEVER USE IT when you have a GUI!

Installation

Fuck the emacs operating system, we just want a terminal editor. Always install it without X support:

sudo apt install emacs-nox

Configuration

• Use CUA mode
• This common config should work well in both terminal and UI:

/home/m/development/config/common/home/m/.emacs

NOTE that you need some other things to be configured properly:

• the terminal must use a light light blue background since it will be carried over into [emacs -nw]
• the terminal must have 256-color support; set this in .bashrc:

export TERM=xterm-256color

• Make sure you check out undo support via [ctrl-x u]

GPG

Emacs can auto-en/decrypt GPG files during load/save, which is EXCELLENT since there is never plaintext on disk.

• You should have gpg installed by default, but apt install if needed. Create a strong key with passphrase; see gpg.
• Configure emacs to prompt for PIN, otherwise gpg-agent prompt and emacs interfere with each other and lock out keyboard:

emacs ~/.emacs.d/init.el
  (setq epa-pinentry-mode 'loopback)

• Use files with .gpg extention to inform emacs to attempt decryption.
• To create a newly encrypted file, just tell emacs to open it, and select your gpg key as encryption target (hit M on it, then hit Enter on the OK "button"). When you save, it will be encrypted.