Using VI Editor

• General Startup
• Counts
• Cursor Movement
• Screen Movement
• Inserting
• Deleting
• Copying Code
• Put Command
• Find Commands
• Miscellaneous Commands
• Line Editor Mode
• ex Commands
• Substitutions
• Reading Files
• Write File
• Moving
• Shell Escape
• Find and Replace
• Dos2unix conversion
• Replace ^M with newline

General Startup
      To use vi: vi filename
      To exit vi and save changes: ZZ or :wq
      To exit vi without saving changes: :q!
      To enter vi command mode: [esc]
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Counts
      A number preceding any vi command tells vi to repeat that command that many times.
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Cursor Movement
      h - move left (backspace)
      j - move down
      k - move up
      l - move right (spacebar)
      [return] - move to the beginning of the next line
      $ - last column on the current line
      0 - move cursor to the first column on the current line
      ^ - move cursor to first nonblank column on the current line
      w - move to the beginning of the next word or punctuation mark
      W - move past the next space
      b - move to the beginning of the previous word or punctuation mark
      B - move to the beginning of the previous word, ignores punctuation
      e - end of next word or punctuation mark
      E - end of next word, ignoring punctuation
      H - move cursor to the top of the screen
      M - move cursor to the middle of the screen
      L - move cursor to the bottom of the screen
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Screen Movement
      G - move to the last line in the file
      xG - move to line x
      z+ - move current line to top of screen
      z - move current line to the middle of screen
      z- - move current line to the bottom of screen
      ^F - move forward one screen
      ^B - move backward one line
      ^D - move forward one half screen
      ^U - move backward one half screen
      ^R - redraw screen (does not work with VT100 type terminals)
      ^L - redraw screen (does not work with Televideo terminals)
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Inserting
      r - replace character under cursor with next character typed
      R - keep replacing character until [esc] is hit
      i - insert before cursor
      a - append after cursor
      A - append at end of line
      O - open line above cursor and enter append mode
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Deleting
      x - delete character under cursor
      dd - delete line under cursor
      dw - delete word under cursor
      db - delete word before cursor
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Copying Code
      yy - (yank)'copies' line which may then be put by the p(put) command. Precede with a count for multiple lines.
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Put Command
      brings back previous deletion or yank of lines, words, or characters
      P - bring back before cursor
      p - bring back after cursor
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Find Commands
      ? - finds a word going backwards
      / - finds a word going forwards
      f - finds a character on the line under the cursor going forward
      F - finds a character on the line under the cursor going backwards
      t - find a character on the current line going forward and stop one character before it
      T - find a character on the current line going backward and stop one character before it
      ; - repeat last f, F, t, T
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Miscellaneous Commands
      . - repeat last command
      u - undoes last command issued
      U - undoes all commands on one line
      xp - deletes first character and inserts after second (swap)
      J - join current line with the next line
      ^G - display current line number
      % - if at one parenthesis, will jump to its mate
      mx - mark current line with character x
      'x - find line marked with character x
      NOTE: Marks are internal and not written to the file.
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Line Editor Mode
      Any commands form the line editor ex can be issued upon entering line mode.
      To enter: type ':'
      To exit: press[return] or [esc]
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ex Commands
      For a complete list consult the UNIX Programmer's Manual
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SUBSTITUTION
      :#,#s/old/new/g
nbsp;     # - line number range
      old - pattern to replace
      new - pattern to insert
      g - optional key for global substitution (multiple occurences of old on the same line will not be replace without this)
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READING FILES
      copies (reads) filename after cursor in file currently editing
      :r - filename
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WRITE FILE
      :w - saves the current file without quitting
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MOVING
      :# - move to line #
      :$ - move to last line of file
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SHELL ESCAPE
      executes 'cmd' as a shell command.
      :!'cmd'
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Find and replace
      :%s/find/replace/g
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Dos2unix conversion (Remove ^M at the end of every line)
      :%s/<Ctrl-V><ENTER>//g
PS: <Ctrl-V> means you have to press V while holding CTRL and <ENTER> means Enter key from your keyboard
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Replace ^M with newline
      :%s/<Ctrl-V><ENTER>/\r/g
PS: <Ctrl-V> means you have to press V while holding CTRL and <ENTER> means Enter key from your keyboard
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