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Full Discussion: Remove lines
Top Forums UNIX for Dummies Questions & Answers Remove lines Post 302953754 by radius on Tuesday 1st of September 2015 04:59:16 AM
Old 09-01-2015
Remove lines

I need to remove rows with the last update date (column 2nd) but when it equals (column1 & column 2) , just remove one of them

input.txt

Code:
6281271467892|2015-01-07
5555571618533|2015-01-01
5555571618533|2015-01-02
5555571800645|2015-01-12
5555567476389|2015-01-04
5555567972749|2015-01-12
5555567972749|2015-01-01
5555583587323|2015-01-15
5555583587323|2015-01-15


Output
Code:
5555571618533|2015-01-02
5555571800645|2015-01-12
5555567476389|2015-01-04
5555567972749|2015-01-12
5555583587323|2015-01-15

Thanks
 

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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. DIAGNOSTICS
The column utility exits 0 on success, and >0 if an error occurs. 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 " ; 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. BSD
June 6, 1993 BSD
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