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Top Forums UNIX for Advanced & Expert Users penalty for case insensitive grep Post 302499611 by Corona688 on Thursday 24th of February 2011 10:29:04 PM
Old 02-24-2011
Quote:
Originally Posted by phil518
Can someone provide some insight why this is the case?
Is this GNU grep? The GNU utilities, unusually, try to handle your character set as appropriate. This means when you tell it to be case insensitive, that busts out some pretty heavy-duty routines in order to do so properly.
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WHOIS.CONF(5)							 Debian GNU/Linux						     WHOIS.CONF(5)

NAME
whois.conf - alternative WHOIS servers list for whois client SYNOPSIS
/etc/whois.conf DESCRIPTION
This file contains a list of WHOIS servers which can augment or override the built-in list of the client. It's a plain text file in ASCII encoding. Each line consists of two fields: a pattern to match WHOIS object identifier and a corresponding WHOIS server domain name. Fields are separated by non-empty sequence of space or a tabular characters. A line starting with a hash character is a free comment and it's not considered. The pattern is case-insensitive extended regular expression if whois client has been compiled with POSIX regular expressions support. Oth- erwise, simple case-insensitive suffix comparison against WHOIS object identifier is used. Internationalized domain names (IDN) must be specified in ascii-compatible encoding (ACE) format. EXAMPLE
.nz$ nz.whois-servers.net # Hangul Korean TLD .xn--3e0b707e$ whois.kr # Private ASNs ^as645(1[2-9]|2[0-9]|3[0-4])$ whois.example.net FILES
/etc/whois.conf SEE ALSO
whois(1) AUTHOR
This manual page was written by Petr Pisa <ppisar@redhat.com> and is licensed under the terms of the GNU General Public License, version 2 or higher. Petr Pisa 9 April 2013 WHOIS.CONF(5)
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