Some useful keyboard shortcuts in VIM

Shortcuts	Commmand
H, M, L	go to Highest, Middle, Lowest
0, $	first, last char in line
gi / g;	go to the last edited location
w / e	go to the beginning/end of word
Ctrl+S/Ctrl+Q	block/unblock terminal
`{`/`}`	jump to next/previous paragraph.

Shortcuts	Commmand
/foo\c	find ignore case, `\c` is the escape char
:%s/<string>//gn	count matching pattern
:%s///gn	count if having any previously search
gg=G	autoindent in C code
= (SUPER)	reindent current line or selected area
=%	reindent the current braces {}

When searching:

., *, \, [, ^, and $ are metacharacters.
+, ?, |, &, {, (, and ) must be escaped to use their special function.
\/ is / (use backslash + forward slash to search for forward slash)
\t is tab, \s is whitespace (space or tab)
\n is newline, \r is CR (carriage return = Ctrl-M = ^M)
After an opening [, everything until the next closing ] specifies a /collection. Character ranges can be represented with a -; for example a letter a, b, c, or the number 1 can be matched with [1a-c]. Negate the collection with [^ instead of [; for example [^1a-c] matches any character except a, b, c, or 1.
\{#\} is used for repetition. /foo.\{2\} will match foo and the two following characters. The \ is not required on the closing } so /foo.\{2} will do the same thing.
$foo$ makes a backreference to foo. Parenthesis without escapes are literally matched. Here the \ is required for the closing \).

When replacing:

\r is newline, \n is a null byte (0x00).
\& is ampersand (& is the text that matches the search pattern).
\0 inserts the text matched by the entire pattern
\1 inserts the text of the first backreference. \2 inserts the second backreference, and so on.

Shortcuts	Commmand
:x	write and quit
Q	to go to ex mode
:visual	to back to vim
`qq` / `q`	Start/stop recording
q:	It opens the command window
Ctrl+V	multiple selection
:Ex	file explorer note capital Ex
:ls	list of buffers(eg following)
:cd ..	move to parent directory

Shortcuts	Commmand
:set paste	paste without autoindent
:set nopaste	after pasting (turn on autoindent)
guu / gUU	tolower / toupper line
gU / gUw	uppercase letter / word
~	invert case under cursor
gf (SUPER)	open file name under cursor
ga	ascii, hex, octal of letter under cursor
g8	hex of utf-8 letter under cursor
ggg?G	rot13 whole file
xp	swap next two letters around
Ctrl+A / Ctrl+X	inc/decc number under cursor
Ctrl+R=5*5	insert 25 into text
C	change to end of line (same as `c$`)
`` `#` `g` `g#`	find word under cursor (for/back)wards
%	match brackets {}
Ctrl+N / Ctrl+P	word completion in insert mode
Ctrl+X / Ctrl+L	Line complete (SUPER USEFUL)
di<	to delete in <>
diB	to delete in {} Block
di[	to delete in []

Shortcuts	Commmand
"a	access register, `a` is name of a register
"kyy	copy current line into register `k`
"Kyy	append to register by using a capital letter
"kp	paste it
"+p	paste from system clipboard on Linux
"*p	paste from mouse highlight clipboard
:reg	access all currently defined registers

tesuji/vim_tips.md