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Top Forums Shell Programming and Scripting Fill data in column with previous value Post 302935334 by Scrutinizer on Sunday 15th of February 2015 04:30:33 AM
Old 02-15-2015
OFS= output field separator, it determines which characters are put between fields in the output, in this case it is the empty string "", so no characters. The OFS is inserted between fields, once a record is recomputed, which is the case when one of the fields is modified.

FIELDWIDTHS="2 5 999" is a GNU-only extension to awk, that determines that field 1 consists of the first two characters, field 2 the next 5 and field 3 the rest of the characters..
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COLUMN(1)						    BSD General Commands Manual 						 COLUMN(1)

NAME
column -- columnate lists SYNOPSIS
column [-tx] [-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. 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. Column exits 0 on success, >0 if an error occurred. ENVIRONMENT
COLUMNS The environment variable COLUMNS is used to determine the size of the screen if no other information is available. EXAMPLES
(printf "PERM LINKS OWNER GROUP SIZE MONTH DAY 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. BSD
June 6, 1993 BSD
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