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Top Forums Shell Programming and Scripting case-insensitive if on substring Post 302338340 by dcfargo on Monday 27th of July 2009 03:32:44 PM
Old 07-27-2009
case-insensitive if on substring

I'd like to print a line if a substring is matched in a case insensitive manner

something like do a case insensitive search for ABCD as a substring:

awk '{ if (substr($1,1,4) == "[Aa][Bb][Cc][Dd]") print $1 }' infile > outfile

I'm not certain how to make the syntax work???

Thanks
 

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COLOR.4TH(8)						    BSD System Manager's Manual 					      COLOR.4TH(8)

NAME
color.4th -- FreeBSD color-detection boot module DESCRIPTION
The file that goes by the name of color.4th is a set of commands designed to simplify color logic. The commands of color.4th by themselves are not enough for most uses. Please refer to the examples below for the most common situations, and to loader(8) for additional commands. Before using any of the commands provided in color.4th, it must be included through the command: include color.4th This line is present in /boot/loader.4th file, so it is not needed (and should not be re-issued) in a normal setup. The commands provided by it are: loader_color? Returns FALSE if the loader_color environment variable is set to ``NO'' (case-insensitive) or ``0''. Otherwise returns TRUE (unless booting serial). The environment variables that effect its behavior are: loader_color If set to ``NO'' (case-insensitive) or ``0'', causes loader_color? to return FALSE, indicating to many modules that color should not be used. FILES
/boot/loader The loader(8). /boot/color.4th color.4th itself. /boot/loader.rc loader(8) bootstrapping script. EXAMPLES
Standard i386 /boot/loader.rc: Use color where applicable: loader_color="YES" SEE ALSO
loader.conf(5), loader(8), loader.4th(8) HISTORY
The color.4th set of commands first appeared in FreeBSD 9.0. AUTHORS
The color.4th set of commands was written by Devin Teske <dteske@FreeBSD.org>. BSD
August 6, 2013 BSD
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