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.
This User Gave Thanks to Corona688 For This Post:
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LEARN ABOUT XFREE86
whois.conf
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)