08-03-2007
SED to extract characters
Are you meaning this type of extractions??
1)
$ echo "Red Hat Linux release 7.2 (Enigma)"
Red Hat Linux release 7.2 (Enigma)
**To extract the 7.2 from the above string
$ echo "Red Hat Linux release 7.2 (Enigma)" | sed 's/Red Hat Linux release \([0-9].*[0-9]\).*/\1/g'
7.2
2)
$ id | sed 's/uid=\([0-9]*\).*/\1/g'
64592
3)
$ echo "jadu[1023]" | sed 's/jadu\[\([0-9]*\).*\]/\1/g'
1023
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LEARN ABOUT CENTOS
rhn_register
RHN_REGISTER(8) Red Hat, Inc. RHN_REGISTER(8)
NAME
rhn_register - Connect to Spacewalk Server, Red Hat Satellite or Red Hat Network Classic.
SYNOPSIS
rhn_register [options]
DESCRIPTION
rhn_register is a client program that registers your system with "Spacewalk Server", "Red Hat Satellite" or "Red Hat Network Classic".
After registering, your system can receive software updates, install new software, and remotely manage your system. It can run both in
graphical and text modes.
OPTIONS
-v, --verbose
Increase the debugging output.
--proxy=PROXY
Specify an http proxy to use.
--proxyUser=PROXYUSER
Specify a username to use for an authenticated proxy. This option must be used in conjunction with proxyPassword.
--proxyPassword=PROXYPASSWORD
Specify a password to use for an authenticated proxy. This option must be used in conjunction with proxyUser.
--nox Run in text mode.
--version
Show the program's version number and exit.
-h, --help
Show a help message and exit.
FILES
/etc/sysconfig/rhn/systemid
The digital server ID for this machine if the system has been registered onto "Spacewalk Server" or "Red Hat Satellite" or "Red Hat
Network Classic". This file does not exist otherwise.
/etc/sysconfig/rhn/up2date
The common configuration file used by Red Hat client programs.
SEE ALSO
rhn_check(8), rhnreg_ks(8), rhnsd(8), rhn-profile-sync(8), rhnplugin(8), up2date(5).
AUTHORS
See the AUTHORS file included with this software.
This manual page was written by James Bowes <jbowes@redhat.com>
BUGS
Report bugs to <http://bugzilla.redhat.com>.
COPYRIGHT
Copyright (C) 1999-2011 Red Hat, Inc.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
LAR PURPOSE.
Linux 2011 February 4 RHN_REGISTER(8)