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Top Forums Shell Programming and Scripting awk/sed column replace using column header - help Post 302206285 by jkl_jkl on Tuesday 17th of June 2008 11:45:45 AM
Old 06-17-2008
awk/sed column replace using column header - help

Code:
$ cat log.txt
Name Age Sex Lcation nfld alias xsd
CC 25 M XYZ asx KK Y
BB 21 F XAS awe SS N
SD 21 M AQW rty SD A

How can I replace the column with header "Lcation" with the column with header "alias" and delete the "alias" column?

so that the final output will become:

Code:
Name Age Sex alias nfld xsd
CC 25 M KK asx Y
BB 21 F SS awe N
SD 21 M SD rty A

I can do this by specifying the "field number"(like below), but I wanted to do that using "field header name"
Code:
$ awk  '$4=$6' log.txt  | awk '{$6=""}1'

Please help.
 

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COLRM(1)						    BSD General Commands Manual 						  COLRM(1)

NAME
colrm -- remove columns from a file SYNOPSIS
colrm [start [stop]] DESCRIPTION
The colrm utility removes selected columns from the lines of a file. A column is defined as a single character in a line. Input is read from the standard input. Output is written to the standard output. If only the start column is specified, columns numbered less than the start column will be written. If both start and stop columns are spec- ified, columns numbered less than the start column or greater than the stop column will be written. Column numbering starts with one, not zero. Tab characters increment the column count to the next multiple of eight. Backspace characters decrement the column count by one. ENVIRONMENT
The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colrm as described in environ(7). EXIT STATUS
The colrm utility exits 0 on success, and >0 if an error occurs. SEE ALSO
awk(1), column(1), cut(1), paste(1) HISTORY
The colrm command appeared in 3.0BSD. BSD
August 4, 2004 BSD
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