Prepared by L. Kocbach, Jan Kocbach and Sturle Drageset
NORDPLUS course March 1993


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Editor VI
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VI is a standard editor which you find on all Unix installations.
It is an absolute standard, which makes it extremely valuable.
It can be used from any type of terminal. This latter fact makes
it important.
There are usually other editors, more comfortable, but specific 
to a given installation. Because of it's generality, VI should be
known to any serious user.

Starting VI :

1. The system must know your terminal. If you are in C-shell (see
   explanation), you can specify it by :

				setenv TERM vt100  (from most PC'es) 
				setenv TERM sun    (from sun sunview)
				setenv TERM xterm  (from X-windows) 

2. vi filename
   vi          (Starts with an empty file)

3. Input mode :

 i    Simply type the <i>, and input starts from cursor position.
 s    As i, but the character at cursor position is first
      removed.
 o    Input starts from next line.
 O    Input starts above the line.

   Input mode continues until you press <esc>-key.

4. Colon commands.

 :123           Brings you to line 123.
 :$             Brings you to last line.
 :1            	Brings you to first line.
 :s/a/hello     Replaces the first a by hello. 
 :s/bye/hello/g Replaces all bye on the line by hello.
 :1,$s/a/hello  Does it from line 1 to the end.
 :se number     Shows line-numbers for all lines.
 :se nonumber   Shows no linenumbers.
 :r otherfile   Inserts the file otherfile after the cursors line.
 :5,10d         Deletes lines 5 to 10.
 :1,$d          Cleans the file.
 :w             Store the text on the file.
 :w filename    Store the text as filename.
 :q             Quit program. 

5. Moving up and down the file :

 <ctrl>-u   up 1/2 page.
 <ctrl>-d   down 1/2 page.

6. Searching for text.

 :/hello        locates hello. <n> brings you to next hello, 
				<N> to previous.

7. Show parameters.

 :se            Shows all the parameters you can set. 


This completes the VI minimum. With these features you can do a lot
of typical tasks.

To execute a system-command (e.g. ls -l *.txt) :
  !ls -l *.txt

Other editors on a given workstation :

Hp-motif      nedit filename &
sparc-atom    xedit filename &    ......  running X-windows 
Macintosh     Any textprocessor. C-compiler's editor is easy to use.
Next          point at it.

These are easy yo use and are recommended for most of the tasks.
However, except for the X-windows, they cannot be used across
the networks.