:: How to Change the Hostid In Solaris :::.

bagaimana cara mengubah hostid di Solaris

The Hostid is a globally unique ID for a Sun Solaris Machine. Sometimes, you need to change this hostid for whatever purpose. For example, you current machine is down for hardware failure and you purchased a new machine. However, all your current running software or License are based on this old hostid, and you must bring the new machine up within a very short time. The quick solution is to change the new machine’s hostid to be as same as the old one.

There are several ways to do so, including using a program to flush NVRAM which will change the hostid permanently. I did following experiment to change the Hostid in a Solaris 10 machine temperately. It adds several lines in the /etc/rc2.d/S20sysetup file. If you want to restore the original hostid, you just need to remove these lines and reboot the machine.

Example Change hostid from c93256a to 850168ae

No	Item	Hostid	Decimal	Hex Value	Remak
1	Host ID Original	c93256a	210969962	32 31 30 39 36 39 39 36 32	-
2	New Host ID	850168ae	2231462062	32 32 33 31 34 36 32 30 36 32	-

Step by step How to Change the Hostid of a Sun Oracle Solaris Machine?

Step 1: Convert Hostid 850168ae<hexdecimal format> to Decimal format <2231462062>

http://www.easycalculation.com/hex-converter.php

sample convert 850168ae<hexdecimal format> to 2231462062 <Decimal format >

Step 2: Convert Decimal format <2231462062> to Hex Value format <32 32 33 31 34 36 32 30 36 32>

http://www.easycalculation.com/ascii-hex.php

sample convert 2231462062<Decimal format> to 32 32 33 31 34 36 32 30 36 32 <Hex Value format>

No	Hostid	Decimal	Hex Value	Pad Hex(12 Char String)
1	c93256a	210969962	32 31 30 39 36 39 39 36 32	32 31 30 39 36 39 39 36 32 00 00 00
2	850168ae	2231462062	32 32 33 31 34 36 32 30 36 32	32 32 33 31 34 36 32 30 36 32 00 00

Step 3: backup S20sysetup with #cp /etc/rc2.d/S20sysetup to /etc/rc2.d/S20sysetup.old

root@teguht #cd /etc/rc2.d

root@teguht #ls

K05appserv          K16apache           S10lu               S42ncakmod          S72autoinstall      S89PRESERVE         S98deallocate

K06mipagent         K27boot.server      S20sysetup          S47pppd             S73cachefs.daemon   S90loc.ja.cssd      hostid.org

K15imq              README              S40llc2             S70uucp             S81dodatadm.udaplt  S94ncalogd

root@teguht #cp S20sysetup S20sysetup.old

root@teguht #ls

K05appserv          K16apache           S10lu               S40llc2             S70uucp             S81dodatadm.udaplt  S94ncalogd

K06mipagent         K27boot.server      S20sysetup          S42ncakmod          S72autoinstall      S89PRESERVE         S98deallocate

K15imq              README              S20sysetup.old      S47pppd             S73cachefs.daemon   S90loc.ja.cssd      hostid.org

root@teguht #

Step 4: Change the /etc/rc2.d/S20sysetup file & save

At the bottom of this file, add following code:

# Change hostid to 850168ae

# Convert to decimal value = 2231462062

# http://www.easycalculation.com/hex-converter.php

# Use HEXADECIMAL to BINARY conversion, HEX to Decimal converter, Hexdecimal convertor for heavy lifting

#

# Convert decimal value to ASCII chars = 32 32 33 31 34 36 32 30 36 32

# http://www.easycalculation.com/ascii-hex.php

# Use above web site for this too

#

# Pad ASCII char string to twelve values using zeros

# Result 32 32 33 31 34 36 32 30 36 32 00 00

# If string is only ten chars pad with "00 0" to make eleven

#

# Set the hostid to 807a6e94 - Let's do it!!

echo "hw_serial/v 32 32 33 31 34 36 32 30 36 32 00 00" | mdb -kw

# That's it!  Success

# don't forget to always visit http://fakta-dan-unik.blogspot.com/search/label/Solaris

# Testing by Teguh Triharto

== Before add code ==

root@teguht #cat S20sysetup

#!/sbin/sh

#

# Copyright 2006 Sun Microsystems, Inc.  All rights reserved.

# Use is subject to license terms.

#

# ident "@(#)sysetup    1.27    06/06/05 SMI"

if [ -z "$_INIT_PREV_LEVEL" ]; then

        set -- `/usr/bin/who -r`

        _INIT_PREV_LEVEL="$9"

fi

[ $_INIT_PREV_LEVEL != S -a $_INIT_PREV_LEVEL != 1 ] && exit 0

# Uncomment this line to print the complete system configuration on startup

#[ -x /usr/sbin/prtconf ] && /usr/sbin/prtconf

# If there are trademark files, print them.

[ -d /etc/tm ] && /usr/bin/cat /etc/tm/* 2>/dev/null

#

# Run rctladm to configure system resource controls based on the settings

# previously saved by rctladm.  See rctladm(1m) for instructions on how to

# modify resource control settings.

#

if [ -f /etc/rctladm.conf ] && [ -x /usr/sbin/rctladm ]; then

        /usr/sbin/rctladm -u

fi

root@teguht #

== After add code ==

root@teguht #cat S20sysetup

#!/sbin/sh

#

# Copyright 2006 Sun Microsystems, Inc.  All rights reserved.

# Use is subject to license terms.

#

# ident "@(#)sysetup    1.27    06/06/05 SMI"

if [ -z "$_INIT_PREV_LEVEL" ]; then

        set -- `/usr/bin/who -r`

        _INIT_PREV_LEVEL="$9"

fi

[ $_INIT_PREV_LEVEL != S -a $_INIT_PREV_LEVEL != 1 ] && exit 0

# Uncomment this line to print the complete system configuration on startup

#[ -x /usr/sbin/prtconf ] && /usr/sbin/prtconf

# If there are trademark files, print them.

[ -d /etc/tm ] && /usr/bin/cat /etc/tm/* 2>/dev/null

#

# Run rctladm to configure system resource controls based on the settings

# previously saved by rctladm.  See rctladm(1m) for instructions on how to

# modify resource control settings.

#

if [ -f /etc/rctladm.conf ] && [ -x /usr/sbin/rctladm ]; then

        /usr/sbin/rctladm -u

fi

# Change hostid to 850168ae

# Convert to decimal value = 2231462062

# http://www.easycalculation.com/hex-converter.php

# Use HEXADECIMAL to BINARY conversion, HEX to Decimal converter, Hexdecimal convertor for heavy lifting

#

# Convert decimal value to ASCII chars = 32 32 33 31 34 36 32 30 36 32

# http://www.easycalculation.com/ascii-hex.php

# Use above web site for this too

#

# Pad ASCII char string to twelve values using zeros

# Result 32 32 33 31 34 36 32 30 36 32 00 00

# If string is only ten chars pad with "00 0" to make eleven

#

# Set the hostid to 807a6e94 - Let's do it!!

echo "hw_serial/v 32 32 33 31 34 36 32 30 36 32 00 00" | mdb -kw

# That's it!  Success

# don't forget to always visit http://fakta-dan-unik.blogspot.com/search/label/Solaris

# Testing by Teguh Triharto

root@teguht #

Step 5 : Check Hostid before change (# Showrev)

root@teguht #showrev

Hostname: teguht

Hostid: c93256a

Release: 5.10

Kernel architecture: i86pc

Application architecture: i386

Hardware provider:

Domain:

Kernel version: SunOS 5.10 Generic_147441-01

root@teguht #hostid

0c93256a

root@teguht #

Step 6: Run #sh S20sysetup or ./S20sysetup or reboot Machine (# shutdown -i6 -g0 -y)

root@teguht #./S20sysetup

hw_serial:      0x32    =       0x32

hw_serial+1:    0x31    =       0x32

hw_serial+2:    0x30    =       0x33

hw_serial+3:    0x39    =       0x31

hw_serial+4:    0x36    =       0x34

hw_serial+5:    0x39    =       0x36

hw_serial+6:    0x39    =       0x32

hw_serial+7:    0x36    =       0x30

hw_serial+8:    0x32    =       0x36

hw_serial+9:    0       =       0x32

hw_serial+0xa:  0       =       0x0

initcls:        0x54    =       0x0

root@teguht #

Step 7 : Check Hostid after change (# Showrev)

root@teguht #showrev

Hostname: teguht

Hostid: 850168ae

Release: 5.10

Kernel architecture: i86pc

Application architecture: i386

Hardware provider:

Domain:

Kernel version: SunOS 5.10 Generic_147441-01

root@teguht #hostid

850168ae

.::: Step by step How to Rollback and Change the Hostid Original of a Sun Oracle Solaris Machine? :::.

Step 1 : Copy /etc/rc2.d/S20sysetup.old to /etc/rc2.d/S20sysetup

root@teguht #cd /etc/rc2.d

root@teguht #ls

K05appserv          K16apache           S10lu               S40llc2             S70uucp             S81dodatadm.udaplt  S94ncalogd

K06mipagent         K27boot.server      S20sysetup          S42ncakmod          S72autoinstall      S89PRESERVE         S98deallocate

K15imq              README              S20sysetup.old      S47pppd             S73cachefs.daemon   S90loc.ja.cssd      hostid.org

root@teguht #cp S20sysetup.old S20sysetup

root@teguht #ls

K05appserv          K16apache           S10lu               S40llc2             S70uucp             S81dodatadm.udaplt  S94ncalogd

K06mipagent         K27boot.server      S20sysetup          S42ncakmod          S72autoinstall      S89PRESERVE         S98deallocate

K15imq              README              S20sysetup.old      S47pppd             S73cachefs.daemon   S90loc.ja.cssd      hostid.org

root@teguht #

Step 2 : Check script original

root@teguht #cat S20sysetup

#!/sbin/sh

#

# Copyright 2006 Sun Microsystems, Inc.  All rights reserved.

# Use is subject to license terms.

#

# ident "@(#)sysetup    1.27    06/06/05 SMI"

if [ -z "$_INIT_PREV_LEVEL" ]; then

        set -- `/usr/bin/who -r`

        _INIT_PREV_LEVEL="$9"

fi

[ $_INIT_PREV_LEVEL != S -a $_INIT_PREV_LEVEL != 1 ] && exit 0

# Uncomment this line to print the complete system configuration on startup

#[ -x /usr/sbin/prtconf ] && /usr/sbin/prtconf

# If there are trademark files, print them.

[ -d /etc/tm ] && /usr/bin/cat /etc/tm/* 2>/dev/null

#

# Run rctladm to configure system resource controls based on the settings

# previously saved by rctladm.  See rctladm(1m) for instructions on how to

# modify resource control settings.

#

if [ -f /etc/rctladm.conf ] && [ -x /usr/sbin/rctladm ]; then

        /usr/sbin/rctladm -u

fi

root@teguht #

Step 3 :Reboot Machine (# shutdown -i6 -g0 -y)

root@teguht #shutdown -i6 -g0 -y

Shutdown started.    Tue Jul  3 13:21:15 WIT 2012

Changing to init state 6 - please wait

Broadcast Message from root (pts/2) on teguht Tue Jul  3 13:21:16...

THE SYSTEM teguht IS BEING SHUT DOWN NOW ! ! !

Log off now or risk your files being damaged

Cannot send to device dtremote because it's not a tty

source http://fakta-dan-unik.blogspot.com & http://teguhtriharto.blogspot.com