CS 497C - Introduction to UNIX
Lecture 19: - The GNU emacs Editor
Chin-Chih Chang chang@cs.twsu.edu

Searching with Regular Expressions
* If you can search for both michael and michel with this expression: 
  mich*el.
* You can also use a character class to specify a single character in 
  that class. The pattern that matches both christie or christy should 
  be christ[iy]e*.
* You can use ^ and # to match an expression at the beginning and end of 
  line, respectively.

Searching with Regular Expressions
* To search forward with regular expressions in an incremental manner, 
  use [Ctrl-Alt-s] key sequence, type the regular expressions and then 
  [Enter].
* To repeat a regular expression search, use [Ctrl-Alt-s][Enter][Enter].

Search and Replace
* To globally replace the word Internet with World Wide Web without 
  interaction, first press [Alt-x] and then enter the replace-string 
  command.
* This command completion feature can be done by using 
  [Alt-x]repl[Tab]s[Tab]. First enter the string to be replaced and then 
  enter the target string.

Search and Replace
* You can replace strings in an interactive manner with the 
  query-replace facility.
* The query-replace command is done by [Alt-%]. Then enter the string to 
  be replaced and the target string.
* Using Multiple Files, Windows and Buffers
* To view the same file in two separate windows, use [Ctrl-x]2.
* To move to the other window, the command is [Ctrl-x]o.
* You can increase the window's vertical size by [Ctrl-x]^.
* You can open different file by [Ctrl-x][Ctrl-f].

Using Multiple Files, Windows and Buffers
* To replace current buffer, use [Ctrl-x][Ctrl-v].
* To close other windows, use [Ctrl-x]1.
* To close the current window, use [Ctrl-x]0.
* To call up another buffer, use [Ctrl-x]b.
* You can insert a file into the current file by using [Ctrl-x]i 
  filename.

Escape to Shell
* To escape to shell, use [Ctrl-x][Ctrl-z] or [Alt-x]shell.
* Enter fg to return to emacs.
* To execute a UNIX command, use [Alt-!].
* The help facility is invoked with [Ctrl-h].
* To access help by key, use [Ctrl-h]k and enter the key sequence.
* To close the help window, use [Ctrl-x]1.

Using the Help Facility [Ctrl-h]
* To know what a command does, use [Ctrl-h]f (function) and enter the 
  command.
* To know the key binding, use [Ctrl-h]w (where-is) and enter the command.
* To run the tutorial, use [Ctrl-h]t (tutorial).
* To quit the tutorial, use [Ctrl-x]b to quit to the previous buffer.
* To read the emacs documentation, use [Ctrl-h]i (information).