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Full Discussion: sed find and replace multiple lines
Top Forums Shell Programming and Scripting sed find and replace multiple lines Post 302303898 by siquadri on Friday 3rd of April 2009 09:24:24 PM
Old 04-03-2009
Quote:
Originally Posted by supersimha
I am new to linux and would like to modify the contents of a file preferably using a one line. The situation is as follows

<start>
some lines
"I am the string"
"replace string"
more lines here
<end>

In the above example,On encountering "I am the string", the "replace string "should be modified to say "string replaced"

i tried doing the following

sed -e 's/"I am the string"\n"replace string"/"I am the string"\n"string replaced"' myfile.txt

Also how do I make the modifications reflect in the file. its only diplaying at the terminal

Check this
Code:
nawk '$0 ~/findstring/ {print $0;getline;gsub(/replace string/,"replaced string");print}' datafile > datafile1

 

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LEARN ABOUT OPENSOLARIS

replace

replace(1)							  MySQL database							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), mysql(1), mysqlaccess(1), mysqladmin(1), mysqld(1), mysqld_multi(1), mysqld_safe(1), mysqldump(1), mysql_fix_privi-
       lege_tables(1), mysqlshow(1), mysql_zap(1), perror(1),

       For more information please refer to the MySQL reference manual, which may already be installed locally and which is also available  online
       at http://www.mysql.com/doc/en/

BUGS

       Please refer to http://bugs.mysql.com/ to report bugs.

AUTHOR

       Ver  1.0,  distribution	4.0.24	Michael (Monty) Widenius (monty@mysql.com), MySQL AB (http://www.mysql.com/).  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.mercur-
       media.com)

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +--------------------+------------------------------------+
       |  ATTRIBUTE TYPE    |	       ATTRIBUTE VALUE		 |
       +--------------------+------------------------------------+
       |Availability	    | SUNWmysqlr, SUNWmysqlu, SUNWmysqlt |
       +--------------------+------------------------------------+
       |Interface Stability | External				 |
       +--------------------+------------------------------------+
NOTES

       Source for mysql is available on http://opensolaris.org.

MySQL 4.0							 19 December 2000							replace(1)
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