Frequently used vi commands

hjkl: move cursor

x: delete a char

i: enter INSERT

A: append at the end of current line

a: enter INSERT after cursor

dw: delete word

d$: delete to EOL

de: delete to EOW

dd: delete one line

u/U: undo

ctrl_R: redo

y/p: yank/paste

r/R: replace char

G: go to EOF

gg: go to BOF

[num]g: go to line.

/: search

?: search

:s/old/new: substitute new for the first old in a line

:s/old/new/g: substitute new for the all old in a line

:%s/old/new/g: substitute new for all the old in a file

:%s/old/new/gc: ask for confirmation each time

:! execute a shell command

:w FILENAME save file

o/O: enter INSERT mode below/above the cursor

v: visual mode