VI commands!

h,l,j,k (or arrow-keys) : Move left, right, down, up respectively

0 : To beginning of line

$ : To end of line

w (word) : Step one word to the right

b (back) : Step one word to the left

G : Move to the last line

nG : Move to line n

/string : Searches for string forwards

?string : Searches for string beckwards

% : find corresponding parantheses

u : Undo last change

U : Undo all changes on line

:q! : Exit VI without saving

a (append) : Append text after cursor

A : Append text at the end of line

i (insert) : Insert text on cursor position

o (open) : New line beneath current line

O : New line above current line

p (put) : Insert buffer after cursor

P : Insert buffer on cursor

:r filename : Insert file after cursor

x : Erase character on cursor

dd : Erase line

D : Erase to end of line

y : copy line to buffer

:w filename : Saves the file with name filename

:w : Saves the file

:w >> filename : Append file to filename

ZZ : Save and exit