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Full Discussion: Help to replace a field in one file with a field from another file
Top Forums Shell Programming and Scripting Help to replace a field in one file with a field from another file Post 302305415 by ldapswandog on Wednesday 8th of April 2009 09:56:34 PM
Old 04-08-2009
The command you have does not have a way to determine which line in the other file to get field2 from in order to insert into temp3. If you have a list of data you want to replace field2 with in temp2 then you can execute a for loop to complete your task.
Code:
list.txt contains

john
sally
mike

for name in $(< list.txt); do
    nawk -F'|' -v OFS='|' '$2="$name"' temp2 > temp3
done

An alternative would be the file you want field2 from has the same number of lines and is pipe delimited just like file temp2.
Code:
IFS="|"
cat file_with_field2 | while read field1 field2 rest ; do
    nawk -F'|' -v OFS='|' '$2="$field2"' temp2 > temp3
done

Else you need to provide more information about the content of file1 and file2 along with the desired output.
 

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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)
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