does ddrescue or dd has capability to update the content of an image file Post: 302514516

Sponsored Content

Operating Systems Linux Ubuntu does ddrescue or dd has capability to update the content of an image file Post 302514516 by jao_madn on Saturday 16th of April 2011 07:27:11 AM

04-16-2011

Registered User

Quote:

Originally Posted by Corona688

That depends on your system and disk configuration. Checking the disk for changes or areas in use isn't easy if you want a disk image. What is it? This doesn't have a lot to do with dd or dd_rescue. That takes a bare-metal backup, just clones disks sector-for-sector, rsync checks and updates individual files.

rsync checks individual files, so sounds more up your alley. A backup of files may take a lot more work to actually use than a bare-metal one though.

Code:

$ mkdir a b
$ touch a/stuff
$ rsync -r --delete a/ b
$ ls -l b/stuff
-rw-r--r-- 1 tyler users 0 Apr 15 17:07 b/stuff
$ rm a/stuff
$ rsync -r --delete a/ b
$ ls -l b/stuff
ls: cannot access b/stuff: No such file or directory
$

See man rsync for more options. If you're backing up your root partition you'll want -x so it doesn't leave the partition, and -a so it preserves users, groups, timestamps, etc, etc, etc. And -H so it preserves hardlinks.

Thanks corona688: I just want to know if it possible about what i mention in rsync root and install boot-grub via live cd. I know rsync and using it to backup my home partition.

Thanks by the way.

jao_madn

View Public Profile for jao_madn

Find all posts by jao_madn

We Also Found This Discussion For You

1. Solaris

Jumpstart Question: Update Image?

Hi everyone, We have a T5240 and noticed we were having issues booting the system using our jumpstart server (it seems as though we don't have the correct drivers for the nxge NIC) We thought we needed to update our jumpstart server image 9/10 Solaris SPARC image. Now I'm still learning...

LEARN ABOUT OPENSOLARIS

rsync_selinux

rsync_selinux(8)					rsync Selinux Policy documentation					  rsync_selinux(8)

NAME

       rsync_selinux - Security Enhanced Linux Policy for the rsync daemon

DESCRIPTION

       Security-Enhanced Linux secures the rsync server via flexible mandatory access control.

FILE_CONTEXTS
       SELinux	requires  files to have an extended attribute to define the file type.	Policy governs the access daemons have to these files.	If
       you want to share files using the rsync daemon, you must label the files and directories public_content_t.  So if  you  created	a  special
       directory /var/rsync, you would need to label the directory with the chcon tool.

       chcon -t public_content_t /var/rsync

       To make this change permanent (survive a relabel), use the semanage command to add the change to file context configuration:

       semanage fcontext -a -t public_content_t "/var/rsync(/.*)?"

       This command adds the following entry to /etc/selinux/POLICYTYPE/contexts/files/file_contexts.local:

       /var/rsync(/.*)? system_u:object_r:publix_content_t:s0

       Run the restorecon command to apply the changes:

       restorecon -R -v /var/rsync/

SHARING FILES

       If  you	want  to  share  files	with multiple domains (Apache, FTP, rsync, Samba), you can set a file context of public_content_t and pub-
       lic_content_rw_t.  These context allow any of the above domains to read the content.  If you want a particular domain to write to the  pub-
       lic_content_rw_t domain, you must set the appropriate boolean.  allow_DOMAIN_anon_write.  So for rsync you would execute:

       setsebool -P allow_rsync_anon_write=1

BOOLEANS

       system-config-selinux is a GUI tool available to customize SELinux policy settings.

AUTHOR

       This manual page was written by Dan Walsh <dwalsh@redhat.com>.

SEE ALSO

       selinux(8), rsync(1), chcon(1), setsebool(8), semanage(8)

dwalsh@redhat.com						    17 Jan 2005 						  rsync_selinux(8)

We Also Found This Discussion For You

1. Solaris

Jumpstart Question: Update Image?

Discussion started by: Keepcase

LEARN ABOUT OPENSOLARIS

rsync_selinux