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Full Discussion: awk question
Top Forums UNIX for Beginners Questions & Answers awk question Post 303010243 by RudiC on Thursday 28th of December 2017 06:50:51 PM
Old 12-28-2017
Hmmm - those are not multiple instances of sort but just three sort key definitions - which are not needed, or even can spoil the result. Try simply
Code:
sort file | awk 'p&&p!=$1{print v}{p=$1;v=$0}END{print v}'

 

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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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