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Top Forums Shell Programming and Scripting Help with replace specific column command Post 302828663 by perl_beginner on Wednesday 3rd of July 2013 02:16:03 AM
Old 07-03-2013
Help with replace specific column command

Input file:
Code:
ASD_QAW 12 A_@
AE_AQ 21 PA_123
ASDA_@ 23 ADA_AS
.
.

Output file:
Code:
ASD_QAW 12 A @
AE_AQ 21 PA 123
ASDA_@ 23 ADA AS
.
.

Do anybody know how to just specific and replace "_" in column 3 with tab delimiter (\t)?

Thanks for advice.
 

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COLUMN(1)						    BSD General Commands Manual 						 COLUMN(1)

NAME
column -- columnate lists SYNOPSIS
column [-entx] [-c columns] [-s sep] [file ...] DESCRIPTION
The column utility formats its input into multiple columns. Rows are filled before columns. Input is taken from file operands, or, by default, from the standard input. Empty lines are ignored unless the -e option is used. The options are as follows: -c Output is formatted for a display columns wide. -s Specify a set of characters to be used to delimit columns for the -t option. -t Determine the number of columns the input contains and create a table. Columns are delimited with whitespace, by default, or with the characters supplied using the -s option. Useful for pretty-printing displays. -x Fill columns before filling rows. -n By default, the column command will merge multiple adjacent delimiters into a single delimiter when using the -t option; this option disables that behavior. This option is a Debian GNU/Linux extension. -e Do not ignore empty lines. ENVIRONMENT
The COLUMNS, LANG, LC_ALL and LC_CTYPE environment variables affect the execution of column as described in environ(7). EXIT STATUS
The column utility exits 0 on success, and >0 if an error occurs. EXAMPLES
(printf "PERM LINKS OWNER GROUP SIZE MONTH DAY " ; printf "HH:MM/YEAR NAME " ; ls -l | sed 1d) | column -t SEE ALSO
colrm(1), ls(1), paste(1), sort(1) HISTORY
The column command appeared in 4.3BSD-Reno. BUGS
Input lines are limited to LINE_MAX (2048) bytes in length. BSD
July 29, 2004 BSD
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