Editing

To set per-user default editor use EDITOR environmental variable. Legend

symbol	meaning
C	Control key
M	Alt key

Vim

In order to set options permanently, append them to ~/.vimrc

Edition

operation	shortcut
cut/copy/paste	select with v (whole line with V, rectangular blocks with ctrl + v), use cursors, copy with y, cut with d, paste before cursor with P, after with p
undo	u
reformat code	=, e.g. gg=G

Syntax options

option	shortcut
highlight	:syntax on/off
line numbers	:set number / set nonumber

Vi

General options

option	shortcut
compatibility mode (compatibility with very old plain vi), following command disables compatibility	:set nocompatible

Tmux

Shortcuts

Assuming C-b is the prefix

option	shortcut
bring tmux command line	C-b :
synchronize panes	C-b :setw synchronize-panes
align panes	vertical: C-b M-2, horizontal: C-b M-1

References

1. http://vim.wikia.com/wiki/Vim_Tips_Wiki
2. https://gist.github.com/MohamedAlaa/2961058