backup & restore partition tables on Linux environments [dd]

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To backup and restore disk partition tables, you need to use the command “dd” with two options:

if and of.

if = “input”
of = “output”

For example,

backup,
# dd if=/dev/sda of=backup bs=512 count=1
it will backup the MBR on the first disk, including 64-bit partition which is part of it.

restore,
# dd if=backup of=/dev/sda bs=512 count=1

those commands will only import the primary partition table. it does not deal with any partition tables stored in the other partitions.

–help–

Options are:

–help display this help and exit
–version output version information and exit

GNU coreutils online help: <http://www.gnu.org/software/coreutils/&gt;
For complete documentation, run: info coreutils ‘dd invocation’

[root@b0ydC home]# dd –version
dd (coreutils) 8.22
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html&gt;.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Paul Rubin, David MacKenzie, and Stuart Kemp.
[root@b0ydC home]#

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