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Top Forums UNIX for Dummies Questions & Answers deleteing duplicate lines sing uniq while ignoring a column Post 302429835 by Scrutinizer on Tuesday 15th of June 2010 05:59:20 PM
Old 06-15-2010
I think that could be reduced to:
Code:
sort -uk2 infile

Which would also sort in the 2nd, 3rd and 4th key.
Thanks Anbu, I always suspected the -u option might be in relation to the sort keys only as opposed to the whole line.
I wonder if all sort implementations work this way though.

Last edited by Scrutinizer; 06-15-2010 at 07:15 PM..
 

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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. 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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