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FIRST STEPS: VI
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"FIRST STEPS: VI
Please save the file located at this link as vilesson.txt . It will serve as a practice
file for vi exercises .
1. Intro
Arguably, the most prolific editor in the world is vi. Available
on every UNIX machine (and in its many incarnations also on
Win95/98/NT 1 , DOS, OS/2 and other platforms), with the
recent Internet explosion, this lean and powerful editor is attracting
as much praise as criticism from the cyberspace citizens.
When vi is first started, it expects commands, be it text input,
deletions, changes, searches. Following the command, an argument
usually needs to be given, for example, following command i
(insert text at the cursor), one would type text and then end the
command with Escape . For deletion, one would press
d and then an argument, for example w for
word , or 3w for three words or
} which in vi-speak means to the end of the
paragraph . If simple mnemonic commands are not sufficient,
command line is provided through pressing : (colon).
From there long commands can be executed to be applied to ranges
of lines in text. Even external programs can be used as filters to
process parts of the text.
To a traditional DOS or Mac user, vi seems foreign at first
mainly because it sees text input command as any other editing
instruction and does not allow stacking it with other commands
which almost all DOS and Mac editors do allow. For example, when
inserting text in DOS "EDIT", can you press PageDown to
go down? Yes, naturally, you will say. Not in vi, however, since
text inserting does not have any special ability to be mixed with
other commands. In vi you would first end text inserting command
by pressing Esc (that's how all text input commands are
terminated) and then you would press Ctrl-F (for
Forward Page ). Therefore, it is crucial to remember that
everything is considered a command in vi. Some authors talk about
"insert mode" and "command mode" to em"
....
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