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Clone a Debian system
10.11.09
Clone a Debian system
This is my own recipe to clone a Debian system on two hard disks. It can also be done via network connection (ssh) if the two disks are not in the same computer; it only need to setup the network connections by
If it can't find media (too long anwser), after the liveCD get up to a secure shell, try again using
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Find origanal device
Find original device and list partition table
Mount it
Find clone device and partition it
Format clone partitions
Mount clone
Clone disk
Check that clone coresponds to original
Install grub
Rebuild ssh keys
Unmount disks
Reboot clone blade
ifconfig
Boot on RescueCD
rescuecd docache
exec /linuxrc
fdisk -l /dev/sda
mkdir /mnt/orig
mount /dev/sda1 /mnt/orig
echo "n p 1 1 100G n p 2 4G t 2 83 w" | \
sed 's/ /\n/g' | \
fdisk /dev/sdb
mkfs -t ext3 /dev/sdb1
mkswap /dev/sdb2
mkdir /mnt/clone
mount /dev/sdb1 /mnt/clone
rsync -va /mnt/orig/ mnt/clone
ls /mnt/orig /mnt/clone
- for grub 1
grub-install --root-directory=/mnt/clone --recheck /dev/sdb
- for grub 2
Remove UUID reference in /boot/grub/grub.cfg by replacinggrub2-install --root-directory=/mnt/clone --recheck /dev/sdb
root=UUID=...byroot=/dev/sda1. After first boot, you will need to update grub2 configuration withupdate-grub2
orig=1
clone=2
sed -i 's/\(172\.16\.0\.)'$orig'/\1'$clone'/' \
/mnt/clone/etc/network/interfaces \
/mnt/clone/etc/hosts
sed -i 's/\(blade-\)'$orig'/\1'$clone'/' \
/mnt/clone/etc/hostname \
/mnt/clone/etc/hosts
rm /mnt/clone/etc/udev/rules.d/70-persistent-net.rules
ssh-keygen -t dsa -f /mnt/clone/etc/ssh/ssh_host_dsa_key
ssh-keygen -t rsa -f /mnt/clone/etc/ssh/ssh_host_rsa_key
umount /mnt/orig
umount /mnt/clone
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