04-30-2008
sed search/replace and display
Hi All: I'm using sed to replace one line in a configuration file. After replacing that line I would like to display to screen that line plus 10 lines above and below the line that was changed... How would I go about doing that??
Here is my search and replace string....
sed -e "s/ipaddress.info=$IPchange/comm.info=$IPnew/" node.cfg >tmpnode2
What that line does is find the line ipaddress.info and replace the old IP ($IPchange) with the new IP address ($IPnew). So after the switch I'd like to display that whole section where the change was made which is about 10 line above and below the line that was changed....
Is that clear enough ??
Thanks again.. !!
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LEARN ABOUT REDHAT
replace
REPLACE(1) General Commands Manual REPLACE(1)
NAME
replace - A utility program that is used by msql2mysql, but that has more general applicability as well. replace changes strings in place
in files or on the standard input. Uses a finite state machine to match longer strings first. Can be used to swap strings.
USAGE
replace [-?svIV] from to from to ... -- [files]
or
replace [-?svIV] from to from to ... < fromfile > tofile
SYNOPSIS
replace [-?|-I] [-s] [-v]
DESCRIPTION
replace
-?|-I info
-s silent
-v verbose
EXTRA INFO
Special characters in from string:
^ Match start of line.
$ Match end of line.
Match space-character, start of line or end of line. For a end the next replace starts locking at the end space-character. A
alone in a string matches only a space-character.
EXAMPLE
this command swaps a and b in the given files:
shell> replace a b b a -- file1 file2 ...
SEE ALSO
isamchk (1), isamlog (1), mysqlaccess (1), mysqladmin (1), mysqlbug (1), mysqld (1), mysqldump (1), mysqlshow (1), msql2mysql (1), perror
(1), replace (1), safe_mysqld (1), which1 (1), zap (1),
AUTHOR
Ver 1.0, distribution 3.23.29a Michael (Monty) Widenius (monty@tcx.se), TCX Datakonsult AB (http://www.tcx.se). This software comes with
no warranty. Manual page by L. (Kill-9) Pedersen (kill-9@kill-9.dk), Mercurmedia Data Model Architect / system developer (http://www.mer-
curmedia.com)
20 December 2000 REPLACE(1)