How to Restore off a mounted slave disk on Redhat + Cpanel

Warning : This is not to be done by the unexperienced admins .

Sometimes when the server get hacked or boot from a bad kernel you need to have the datacenter mount your old drive, and install a new one with a fresh installation. This topic will guide you how to restore a complete server to a new one form the old drive which is mounted as secondary drive to the server.

I. Mount the backup Drive

First check to see if there are any drives mounted.

If it is not mounted, please mount manually the old drive to any location, say /mnt/old

For that please do the following:

fdisk -l

check for additional drives, in this tutorial we will use /dev/hdc3.

mount /dev/hdb3 /mnt/old

now that the drive is mounted you can browse files like:

ls /mnt/old/home

II. Rsync the files

Do these commands one by one,

rsync -vrplogDtH /mnt/old/usr/local/apache/conf /usr/local/apache

rsync -vrplogDtH /mnt/old/var/named /var

rsync -vrplogDtH /mnt/old/home/* /home

rsync -vrplogDtH /mnt/old/usr/local/cpanel /usr/local

rsync -vrplogDtH /mnt/old/var/lib/mysql /var/lib

rsync -vrplogDtH /mnt/old/var/cpanel /var

rsync -vrplogDtH /mnt/old/usr/share/ssl /usr/share

rsync -vrplogDtH /mnt/old/var/ssl /var

rsync -vrplogDtH /mnt/old/usr/local/cpanel/3rdparty/mailman /usr/local/cpanel/3rdparty

rsync -vrplogDtH /mnt/old/var/log/bandwidth /var/log

rsync -vrplogDtH /mnt/old/usr/local/frontpage /usr/local

rsync -vrplogDtH /mnt/old/var/spool/cron /var/spool

Next Step – Get some important files from etc:

cd /mnt/old/etc

rsync -vrplogDtH secondarymx domainalias valiases vfilters exim* proftpd* pure-ftpd* passwd* group* *domain* *named* wwwacct.conf cpupdate.conf quota.conf shadow* *rndc* ips* ipaddrpool* ssl /etc

Now would be a good time to change your password for root:

passwd

III. Updating software and restarting services

/scripts/upcp

/scripts/updatenow

/scripts/sysup

/scripts/fixeverything

/scripts/exim4

/scripts/easyapache

/scripts/securetmp

This is needed to update cpanel information. Please note, sshd might fail and not start after running fixeverything. You have to login to whm, and go to the rpm installer and “FORCE” install opensshd-server, opensshd, opensshd-client and then restart sshd from whm.

IV. Restarting services

/scripts/restartsrv httpd

/scripts/restartsrv cpanel

/scripts/restartsrv mysql

/scripts/restartsrv named

/scripts/restartsrv exim

Thats all. This will work 100% in redhat and fedora OS.  It will work fine on FreeBSD except slight changes in 2 lines:

rsync -vrplogDtH /mnt/old/var/lib/mysql /var/lib

should be:

rsync -vrplogDtH /mnt/old/var/db/mysql /var/db

and also after running “cd /mnt/old/etc” :

rsync -vrplogDtH secondarymx domainalias valiases vfilters exim* proftpd* pure-ftpd* passwd* group* *domain* *named* wwwacct.conf cpupdate.conf quota.conf shadow* *rndc* ips* ipaddrpool* ssl /etc

should be:

rsync -vrplogDtH secondarymx domainalias valiases vfilters exim* cpupdate.conf quota.conf master.passwd* *rndc* ips* ipaddrpool* ssl /etc

Other than that rest will work fine and should restore all accounts and settings.

Reference : http://www.webhostingtalk.com/archive/index.php/t-232162-p-1.html

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s