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This article is for 1&1 Linux WebHosting only.
How to restore the server using the rescue system
If you accidentally misconfigured your server or it won't start up properly for any
reason please use the Recovery-Tool to restart the Root-server bypassing its
internal hard drive.
Prerequisite: Root-Server has to boot up in the Rescue-System
The Rescue System is a Linux system that runs on a RAM-Disk. A connection with
your Root-Server will look something like this:
# ssh root@yourRoot-Server
Password: XXXXX
Welcome to pureserver rescue disk
rescue:~# df
Filesystem 1k-blocks Used Available Use% Mounted on
/dev/ram0 31729 26640 5089 84% /
rescue:~#
From here you can partition your internal hard drive or edit incorrect settings.
The following is the standard partitioning of the internal harddrive:
root@pureserver-rescue:~# fdisk -l
Disk /dev/hda: 16 heads, 63 sectors, 58168 cylinders
Units = cylinders of 1008 * 512 bytes
Device Boot Start End Blocks Id System
/dev/hda1 1 66 530113+ 83 Linux
/dev/hda2 67 321 2048287+ 82 Linux swap
/dev/hda4 322 5005 37624230 5 Extended
/dev/hda5 322 959 5124703+ 83 Linux
/dev/hda6 960 1597 5124703+ 83 Linux
/dev/hda7 1598 5005 27374728+ 83 Linux
root@pureserver-rescue:~#
First of all you should run a filesystem check to fix any errors in the file
structure.
rescue:~# fsck.ext3 -y /dev/hda1
hda5, hda6, and hda7 are XFS need not be checked. Just mount them. xfs_check will be invoked which then
checks for errors.
Now you can mount the internal harddrive into the /mnt directory and change into
the system on the partition:
rescue:~# mount -t ext3 /dev/hda1 /mnt
rescue:~# mount -t xfs /dev/hda5 /mnt/usr
rescue:~# mount -t xfs /dev/hda6 /mnt/home
rescue:~# mount -t xfs /dev/hda7 /mnt/var
Now you can repair and/or configure your Root-Server in /mnt
After you have finished restoring your root server you need to execute the
following commands to restart your Root-Server:
rescue:~# umount /mnt/home
rescue:~# umount /mnt/var
rescue:~# umount /mnt/usr
rescue:~# umount /mnt
rescue:~# shutdown -rn now
Do not forget to unmount your internal hard drive after the restore and BEFORE you
restart the server. Also remember to change your Root-Server back to normal boot
mode from your Control Panel.
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Some old servers have the partition set as follows (not available anymore):
The Rescue System is a Linux system that runs on a RAM-Disk. A connection with
your Root-Server will look something like this:
# ssh root@yourRoot-Server
Password: XXXXX
Welcome to pureserver rescue disk
rescue# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda3 37428528 11650336 23876900 33% /
/dev/hda1 253920 26584 214084 12% /boot
none 253516 0 253516 0% /dev/shm
From here you can partition your internal hard drive or edit incorrect settings.
The following is the standard partitioning of the internal harddrive:
rescue# fdisk -l
Disk /dev/hda: 40.0 GB, 40020664320 bytes
255 heads, 63 sectors/track, 4865 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/hda1 * 1 33 265041 83 Linux
/dev/hda2 34 131 787185 82 Linux swap
/dev/hda3 132 4865 38025855 83 Linux
First of all you should run a filesystem check to fix any errors in the file
structure.
rescue:~# fsck.ext3 -y /dev/hda1 ...
rescue:~# fsck.ext3 -y /dev/hda3
Now you can mount the internal harddrive into the /mnt directory and change into
the system on the partition:
rescue:~# mount /dev/hda3 /mnt
rescue:~# mount /dev/hda1 /mnt/boot
rescue:~# chroot /mnt
Now you can repair and/or configure your Root-Server in /mnt
After you have finished restoring your root server you need to execute the
following commands to restart your Root-Server:
rescue:~# umount /mnt/boot
rescue:~# umount /mnt
rescue:~# shutdown -rn now
Do not forget to unmount your internal hard drive after the restore and BEFORE you
restart the server. Also remember to change your Root-Server back to normal boot
mode from your Control Panel.
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