How to convert NSM OS to CentOS?

If you dislike to go on to runing NSM on NSMXpress box.

 

please follow me to change the current OS to CentOS

 

1, change yum source

open webpage:

login to nsm console

# cd /etc/yum.repos.d

# wget

 

2, install centos release

# rpm -ivh 

 

3, download new centos GPG

# mkdir /etc/pki/rpm-gpg

# wget

 

4, start to upgrade to CentOS 4.8

# yum makecache

# yum upgrade -y

 

5, try to reboot your server to make sure the new OS can run well.

 

6, let me explain the current partition table

/dev/sda1  ====> recovery partition

/dev/sda2  ====> active linux root partion, one active boot partition

all others will not be introduced here.

 

7, backup all /usr, /var, and / partition data to /dev/sda1, suggest us to use cpio to copy these system files to /dev/sda1

 

8, Remove all left partition

Currently, I will remove all remaining partitions except for sda1 sda2,

make new sda5 for swap, sda6 for user data

just run "fdisk /dev/sda" to finish this job

 

9, change /boot/grub/menu.lst ( original on /dev/sda1)

terminal --silent
default 0
fallback 1
timeout=10
hiddenmenu
title Linux                                                                
        configfile (hd0,0)/boot1/grub/menu.lst
title NSMXpress                                                                
        configfile (hd0,1)/boot/grub/menu.lst
title Rescue
        kernel (hd0,0)/boot/vmlinuz root=/dev/sda1 rescue ks=hd:sda1/ks.cfg devfs=nomount ramdisk_size=8192 console=ttyS0,9600 headless noshell
        initrd (hd0,0)/boot/initrd.img
title Re-Install
        pause Using this option will completely erase your appliance and load the factory    default image.  No data recovery is possible after re-installing.  To confirm  erase and re-install, type "erase" at the password prompt.  To abort and boot  into Rescue mode, just hit at the password prompt.  Press any key.
        password erase
        kernel (hd0,0)/boot/vmlinuz root=/dev/sda1 ks=hd:sda1/ks.cfg devfs=nomount ramdisk_size=8192 console=ttyS0,9600 headless
        initrd (hd0,0)/boot/initrd.img
title Rescue Boot from Secondary Drive
        configfile (hd0,0)/boot/grub/menu.lst

 

when you copy sda2:/boot to sda1, you need to give sda2/boot to one new name /boot1, to avoid the name conflict with the original /boot partition.

 

you need to change new /boot1/grub/menu.lst to:

#boot=/dev/sda
default=0
timeout=1
terminal --silent
hiddenmenu
title CentOS (2.6.9-89.31.1.ELsmp)
        root (hd0,0)
        kernel /boot1/vmlinuz-2.6.9-89.31.1.ELsmp ro root=/dev/sda1 console=tty0 console=ttyS0,9600
        initrd /boot1/initrd-2.6.9-89.31.1.ELsmp.img
title CentOS (2.6.9-89.31.1.EL)
        root (hd0,0)
        kernel /boot1/vmlinuz-2.6.9-89.31.1.EL ro root=/dev/sda1 console=tty0 console=ttyS0,9600
        initrd /boot1/initrd-2.6.9-89.31.1.EL.img
title Juniper Management Appliance 5.0 i386 (2.6.9-67.0.20.ELsmp)
        root (hd0,0)
        kernel /boot1/vmlinuz-2.6.9-67.0.20.ELsmp ro root=/dev/sda1 console=tty0 console=ttyS0,9600
        initrd /boot1/initrd-2.6.9-67.0.20.ELsmp.img
title Juniper Management Appliance 5.0 i386-up (2.6.9-67.0.20.EL)
        root (hd0,0)
        kernel /boot1/vmlinuz-2.6.9-67.0.20.EL ro root=/dev/sda1 console=tty0 console=ttyS0,9600
        initrd /boot1/initrd-2.6.9-67.0.20.EL.img

 

10. The END

 

There is no any difficult action for us. Furthermore this article is not full correct for us. just take a look.