Vim

Modal editing — motions, operators, and commands.

i / aInsert before / after cursor

I / AInsert at line start / end

o / OOpen line below / above

v / VVisual / visual-line

Ctrl-vVisual block

EscBack to normal mode

w / bNext / prev word

0 / $Line start / end

gg / GFile start / end

{ / }Prev / next paragraph

%Matching bracket

f<c> / t<c>Find / till char

dd / yyDelete / yank line

dw / cwDelete / change word

x / r<c>Delete / replace char

p / PPaste after / before

u / Ctrl-rUndo / redo

. Repeat last change

/patternSearch forward

n / NNext / prev match

*Search word under cursor

:%s/a/b/gReplace all in file

:%s/a/b/gcReplace with confirm

:wSave

:q / :q!Quit / force quit

:wq / ZZSave and quit

:sp / :vspSplit horizontal / vertical

Ctrl-w wCycle windows

diwDelete inner word

ci"Change inside quotes

yi(Yank inside parens

dapDelete a paragraph

d3jDelete 3 lines down

Combine an operator (d, c, y) with a motion or text object.

More Tools cheatsheets

Git

Everyday version control — branches, commits, undo, and rebase.

Bash

Shell scripting, redirection, and command-line survival.

Regex

Pattern matching — anchors, classes, quantifiers, groups.