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Top Forums UNIX for Dummies Questions & Answers shell script to replace a line contain an unkown pattern starting with "aaa, bbb" Post 302243935 by Dingrong on Monday 6th of October 2008 09:15:11 PM
Old 10-06-2008
shell script to replace a line contain an unkown pattern starting with "aaa, bbb"

Hello, can any one help me on this?

I have a /etc/exports file, it may contain a line (I can not remember exactly). Let me use an a sample file myfile.txt which contains a line
* mypattern uncertain key words

I want this line (with any possible combination of the uncertain key words to be replaced by the line below:

* mypattern root

I read some post on this forum about using sed to replace known patternA to a known patterB in file. Here since I do not know the 'uncertain key words' so I am stumble here. Please help.

Thanks in advance

--Dingrong
 

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POLISH(5)							      Debian								 POLISH(5)

NAME
polish - a list of Polish words DESCRIPTION
/usr/share/dict/polish is an ASCII file which contains an alphabetic list of words, one per line. FILES
/etc/dictionaries-common/words is a symbolic link to a /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. 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 UTF-8 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. Debian Project March 29th, 2011 POLISH(5)
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