C-x f => open file
C-x s => save file
C-x C-w => save to a new file
M-x => (execute-extended-command)
M-x man => open man's page entry for *NIX command. requires system man command to run
M-x woman => open man's page entry for *NIX command. doesn't require system man command to run
C-h C-h => help section overview
C-h m | f | v | a | w | k => help sections(the current mode | function | variable | search for command | whereis command | keys)
self-insert-command => called for each character input
s => save
v => revert
d => discard
a => view
s s => size
s m => mode
s i => inverse
s a => alphabet
s f => filename
s v => viewing time
/ > => size greater than
/ < => size less than
/ / => undo filters
/ m => mode
/ f => filename
/ c => file content
/ n => buffer name
C-x r m => mark
C-x r l => list
C-x r b => visit
C-x d => enable dired mode
S => symlink a file
H => hard link a file
C => copy a file
R => rename a file
d => flag file for deletion
C-x r w => save to register
C-x r j => jump to register
C-x r s => save window state to register
C-x r => insert region
Record a series of keyboard steps for use later.
An example, will be to convert the third word of very sentence or line to uppercase.
C-x ( => start recording macro
C-x ) => stop recording macro
C-x e => playback macro