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Full Discussion: smbclient & dd
Top Forums UNIX for Advanced & Expert Users smbclient & dd Post 302603622 by dr_mabuse on Thursday 1st of March 2012 01:45:16 PM
Old 03-01-2012
Quote:
Originally Posted by Corona688
These GUIs can be misleading since the actual underlying filesystem isn't using URL's.

To actually mount a CIFS file share(CIFS = samba shares / windows shares / etc) with mount:

[code]# /mnt/share, or wherever you mount it, should already exist and
# be an empty folder.
------- Post updated at 12:22 PM ---------- Previous update was at 12:16 PM ----------

dd isn't psychic. dd won't know and cannot know what space is occupied, that's handled at the filesystem level. You need to use filesystem-specific tools to handle that, and how that's done depends on the filesystem type.

Three options:

1) Do it manually. Save your boot sector and /etc/fstab so you know what kind of partitions belong where, then create tarballs of the contents of every partition. By restoring the boot sector, 'w'-ing it inside 'fdisk', re-creating empty partitions and un-taring their contents in them, you ought to create a bootable system.

2) Cheat, forcing an ordinary dd dump to compress better. Boot a livecd and mount partitions, then 'dd if=/dev/zero of=/mnt/partition/bigfile bs=1048576 ; rm /mnt/partition/bigfile' to overwrite all unused space with zeroes. When you make your dd dump, it should now compress very well when piped through gzip because all empty space will contain zeroes.

3) Use partiton-specific tools. (dump can understand ext2/ext3)

I usually do option 1, myself, since it allows you to create a new system with different partition sizes on restore, though it's fiddly and a lot more work.
So, to the smb server in for example, /mnt/share, I shall first mkdir /mnt/share; and then
Code:
mount -t cifs //safe/mysharedfolder -o username=user,password="password" /mnt/share

right?

-about the first option of taking backup, could you clarify it for me with an example? I don't know about /etc/fstab n how to take my partition from there n tar them.

thanks
 

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LEARN ABOUT DEBIAN

bootcdbackup

BOOTCDBACKUP(1) 						   bootcd utils 						   BOOTCDBACKUP(1)

NAME

       bootcdbackup - create a bootable offline backup of a unix system

SYNOPSIS

       bootcdbackup [-i] [-v] [-s] [-c <config directory>] [-url <url] [-nomount] [-2diskconf <file>] <dev> <name> <builddir>

DESCRIPTION

       bootcdbackup  creates a offline backup from a installed system. You need a running bootcd to boot the system with. This CD/DVD is booted on
       the system and bootcdbackup creates a bootable CD/DVD with the bootcd kernel and the backup disk as tar-file.

       To restore or clone the system, boot the CD/DVD image and install it with bootcd2disk -c <name> on the system.

       bootcdbackup can try to discover the disk partition by searching for fstab on the given partition. A other way to backup the partition  ta-
       ble is the program bootcdmk2diskconf which creates a configuration file on a running system.

OPTIONS

       -i  The bootcdbackup runs in interactive mode and you can run each function manually. This option is useful for debugging.

       -v  The option "-v" (verbose) adds messages on running.

       -s  This option can be used to disable interactive questions and to try to ignore errors.

       -c <config directory>
	   The configuration directory which includes the file "bootcdbackup.conf", default is "/etc/bootcd".

       -url <url>
	   If bootcdbackup is slow on your system (because of a slow CD/DVD drive or the HP ILO virtual CD interface), you can use an image server
	   to get the image from.

	   bootcdbackup use the SWAP partition of your upcoming system as temporary space and copy the image from the configured image	server	to
	   this partition and use it as image.	The image server url is configured with this option.

       -nomount
	   The target disk should not be mounted and no search for fstab is done.

       --cpio
	   Normally  as  backup  tool  star  will be used if selinux files have to be backed up and cpio will be used if not. With this option the
	   usage of cpio can be forced.

       --star
	   Normally as backup tool star will be used if selinux files have to be backed up and cpio will be used if  not.  With  this  option  the
	   usage of star can be forced.

       -2diskconf <file>
	   The	parameter  configures a bootcd2disk.conf for the restore of the system done by bootcd2disk.  The configuration file can be created
	   with the command bootcdmk2diskconf.

	<dev>
	   Configures the device where bootcdbackup finds the file "fstab" and discover the configuration for the restore.

	<name>
	   The name of the backup (no blanks!) is used on the creation time and to restore the backup with bootcd2disk -c <name>.

	<builddir>
	   Builddir is an directory on the backup system where bootcdbackup build the backup CD/DVD. Space for the CD/DVD image,  for  compression
	   and the data is needed!

       All other configuration has to be done in the config files.

FILES

       /etc/bootcd/bootcdbackup.conf

       Configuration for bootcdbackup.

SEE ALSO

       Documentation in bootcdbackup.conf

       bootcdbackup.conf(5), bootcd(1), bootcdflopcp(1), bootcdwrite(1)

AUTHOR

       This  manual  page  was written by Bernd Schumacher <bernd.schumacher@hp.com> and Carsten Dinkelmann <Carsten.Dinkelmann@foobar-cpa.de> for
       the Debian GNU/Linux system (but may be used by others).

bootcdbackup							    2007-07-05							   BOOTCDBACKUP(1)
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