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Full Discussion: Swapping in VI editor
Top Forums UNIX for Dummies Questions & Answers Swapping in VI editor Post 302328508 by fpmurphy on Wednesday 24th of June 2009 12:18:44 PM
Old 06-24-2009
Perhaps an example would help you. Suppose you have the following text file
Code:
abcdefg
faaaag
accxxcck
abbde

and want to use vi to search and replace all instances of 'b', 'c', 'd' and 'e' with 'Q',
you can do with the following command ":%s/[b-e]/Q/g' which results in
Code:
aQQQQfg
faaaag
aQQxxQQk
aQQQQ

Here is an except from a typical vi man page regarding substitute:
Code:
    [range] s[ubstitute] [/pattern/replace/] [options] [count] [flags]
    [range] & [options] [count] [flags]
    [range] ~ [options] [count] [flags]
        Make substitutions. In the substitution string, the characters ~ and %
        may have special meanings. If the entire replace pattern is a percent
        sign (%), the previous replacement pattern is used. (This can be
        useful for repeating substitutions that contain back references.) The
        special character ~ inserts the previous replacement string into this
        replacement string.
        The options can be any of the following:

        c
            Ask for confirmation before replacing the text.

        g
            Perform the replacement on all occurrences of the regular
            expression on the line.

        r
            If no regular expression was specified, use the most recent
            regular expression (used for a search) rather than the same
            regular expression as used for the last substitute command.

 

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LEARN ABOUT DEBIAN

british-english-small

british-english-small(5)					   Users' Manual					  british-english-small(5)

NAME

       british-english-small - a list of English words

DESCRIPTION

       /usr/share/dict/british-english-small is an ASCII file which contains an alphabetic list of words, one per line.

FILES

       There  may  be  any  number  of	word lists in /usr/share/dict/.  /etc/dictionaries-common/words is a symbolic link to the currently-chosen
       /usr/share/dict/<language> file.  /usr/share/dict/words is a symbolic link to /etc/dictionaries-common/words, and  is  the  name  by  which
       other  software should refer to the system word list.  See select-default-wordlist(8) for more information, and/or to change the currently-
       chosen word list.

       The directory /usr/share/dict can contain word lists for many languages, with name of the language in English, e.g., /usr/share/dict/french
       and  /usr/share/dict/danish  contain respectively lists of French and Danish words if they exist.  Such lists should be coded using the ISO
       8859-1 character set encoding.

SEE ALSO

       ispell(1), select-default-wordlist(8), and the Filesystem Hierarchy Standard.

HISTORY

       The words lists are not specific, and may be generated from any number of sources.

       The system word list used to be /usr/dict/words.  For compatibility, software should check that location if /usr/share/dict/words does  not
       exist.

AUTHOR

       Word  lists  are  collected and maintained by various authors.  The Debian English word lists are built from the SCOWL (Spell- Checker Ori-
       ented Word Lists) package, whose upstream editor is Kevin Atkinson <kevina@users.sourceforge.net>.

Debian								   16 June 2003 					  british-english-small(5)
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