Vi

http://www.engadget.com/2012/07/10/vim-how-to/

Blank lines beyond the end of the file are ~.

To get to command mode, hit Esc or ^[. To quit, :q. Quit without saving :q!. To save, :w or combine them with :wq. To specify the filename do :w filename. Another way to save and quit is ZZ.

The two modes are command and insert. Commands can be prefixed with a number, the command will run that many times.

• a enter insert mode after the cursor
• h left one character
• i enter insert mode before the cursor
• j down one character
• k up one character
• l right one character
• r replace one character under the cursor
• u undo the last change
• x delete character under cursor
• " access a buffer
  • "mdd delete the current line and put it in buffer m
  • "mp paste contents of buffer m
• d delete until where
  • d^ deletes current position to beginning of line
  • d$ deletes current position to end of line
  • dw deletes current position to end of word
  • dd deletes entire line (and places cursor on what was the line below)
• D delete from end of line to current cursor position
• Y copy (yank) current line
• y yank (copy) until where, yy is the current line
• p paste after cursor
• P paste before cursor
• << deindent the current line
• >> indent the current line
• A enter insert mode at the end of the current line
• I enter insert mode at the beginning of the current line
• O enter insert mode in a new line above the current line
• o enter insert mode in a new line below the current line
• ^b scroll backwards one page
• ^d scroll forwards half a window
• ^f scroll forward one page
• ^h move the cursor one space to the left
• ^j move cursor down one line in same column
• ^m move to first character on the next line
• ^n same as ^j
• ^p move cursor up one line in same column
• ^u scroll backwards half a window
• ^e scroll forward one line
• ^y scroll back one line
• $ move to the end of the current line
• % move to matching parenthesis or brace
• ^ move to next non-whitespace character
• ( move to beginning of sentence
• ) move to beginning of next sentence
• { move to preceding paragraph
• } move to next paragraph
• + move to first non-whitespace character on next line
• - move to first non-whitespace character on previous line
• _ move to first non-whitespace character on current line
• B back one word, skipping punctuation
• E foreword to end of current word, skipping punctuation
• G goto line number specified in count, if no line number is given, end of file
• H first non-whitespace character at top of the screen
• L first non-whitespace character at bottom of the screen
• M first non-whitespace character at middle of the screen
• W beginning of next word
• b back one word or start of current word
• e or w forward one word, or end of current word
• z redraw the screen
  • with no modifier, with the current line at the top
  • . puts the current line at the center
  • - puts the current line at the bottom
  • if you put a count before, it will put that line number at the center
• ~ change character case
• J join the current line with the next one

Searching - basically regex.

• Matching
  • ^ beginning of line
  • . single character
  • $ end of line
  • [] matches one of any in block
• , repeat the last f F t or T command in the reverse direction
• / search down for the string specified after

  repeat the last f F t or T

• ? search up for string specified after
• F search the current line backwards for the character specified after
• N repeat the last / or ? in the opposite direction
• T search the current line for the character specified after
• f search for a character move to that character
• n repeat last / or ?
• t search for character and move after it

To go into the EX editor (line editor) type :

• ab string strings Abbreviation. Inserts strings when string is typed so ab usa United States of America
• map keys new_seq Lets you map a key or sequence of keys to another key or sequence of keys
• q quit
• q! quit without saving
• s/pattern/to_pattern/options Substitute. Without options, only once g is global
• una string undo abbreviations
• vi filename starts editing a new file
• w save the current file
• w >> filename Append to file
• wq save and quit

Buffers can be accessed with " but if no buffer is specified the general buffer is used.