When I first wrote this, I had been using Linux systems for some time, but had found vi/m to be quite unintuitive. A few months later, I am using vim with various plugins as my go-to text editor.

• command mode: press the escape key to switch to command mode.
• ex mode: while in command mode, type :.
• insert mode: while in command mode type i.

key	effect
h, left arrow	move cursor left
j, up arrow	move cursor up
k, down arrow	move cursor down
l, right arrow	move cursor right

command	effect
q	quit vi
w	'write out' / save
wq, x	save and quit
q!	quit without saving
r <file>	read in file
w <file>	write to file
w! <file>	overwrite file

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Sources:

• https://www.cyberciti.biz/faq/save-file-in-vi-vim-linux-apple-macos-unix-bsd/
• https://kb.iu.edu/d/adxz