Moving Whole OS Centos Server Post: 302586307

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Operating Systems Linux Moving Whole OS Centos Server Post 302586307 by admin_xor on Saturday 31st of December 2011 12:15:01 PM

12-31-2011

Registered User

Well you need to have physical access to the hard drive if you follow the steps I am going to advice you. Is it possible for you? If yes, then add the hard drive (of course you have to shutdown the running CentOS server) to another Linux box and issue the following command:

Code:

dd if=/dev/sdb of=/dev/sdc

Here /dev/sdb is the hard drive to be cloned and /dev/sdc id the new hard drive. The drive name may change depending on the availability of hard drives. Be sure to check if the OS is working well with the new hard disc.

NOTE: I have not tested anything like this with dd command. But as per the logic, it will copy the partition table too. So you will have lots of unused space on the new disk and this free space might be detected. I would not go for a hard disk cloning by any chance.

But if you really want to have a flaw less migration of whole OS while it's running, you would need to use a measure like P2V and V2P (physical to virtual and virtual to physical) migration solutions from the virtualization software vendors like VMware.

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LEARN ABOUT DEBIAN

genhash

genhash(1)						      General Commands Manual							genhash(1)

NAME

       genhash - md5 hash generation tool for remote web pages

SYNOPSIS

       genhash [options] [-s server-address] [-p port] [-u url]

DESCRIPTION

       genhash	is  a  tool used for generating md5sum hashes of remote web pages.  genhash can use HTTP or HTTPS to connect to the web page.  The
       output by this utility includes the HTTP header, page data, and the md5sum  of  the  data.   This  md5sum  can  then  be  used  within  the
       keepalived(8) program, for monitoring HTTP and HTTPS services.

OPTIONS

       --use-ssl, -S
	      Use SSL to connect to the server.

       --server <host>, -s
	      Specify the ip address to connect to.

       --port <port>, -p
	      Specify the port to connect to.

       --url <url>, -u
	      Specify the path to the file you want to generate the hash of.

       --use-virtualhost <host>, -u
	      Specify the virtual host to send along with the HTTP headers.

       --verbose, -v
	      Be verbose with the output.

       --help, -h
	      Display the program help screen and exit.

       --release, -r
	      Display the release number (version) and exit.

SEE ALSO

       keepalived(8), keepalived.conf(5)

AUTHOR

       genhash was written by Alexandre Cassen <acassen@linux-vs.org>.

       This man page was contributed by Andres Salomon <dilinger@voxel.net> for the Debian GNU/Linux system (but may be used by others).

								     Feb 2004								genhash(1)