Re: [BBLISA] System Backup thoughts and questions...

Thu, 08 Jan 2009 14:41:29 -0800

GNU tar will strip the leading '/' off by default, unless you use the -P or --absolute-names option.
However, I would always caution against using absolute paths unless you KNOW what its going to do, especially with tar since there are plenty of versions that don't have this safety feature. 


I don't think I've used "cp -r" in many years. The tar method was 
preferable as it maintained permissions, times, etc.


I'm using rsync a lot more now, especially between systems over ssh.


Kathryn Smith wrote:

I'm dating myself here. You could definitely do it to yourself on BSD, SunOS, 
and single digit Solaris versions. I haven't tried it on any Linux variants. 
Maybe they're more idiot-proof. :-)

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--- On Thu, 1/8/09, David Allan <[email protected]> wrote:


From: David Allan <[email protected]>
Subject: Re: [BBLISA] System Backup thoughts and questions...
To: "Kathryn Smith" <[email protected]>
Cc: [email protected]
Date: Thursday, January 8, 2009, 5:14 PM
Hmm...perhaps it doesn't work on all *nix variants, but

I actually tried 
that before I posted it (on Fedora 10), and it did what I
would expect, 
created /backup/directory/source/directory/<contents>


I'll bear that in mind, though.

Dave


On Thu, 8 Jan 2009, Kathryn Smith wrote:


--- On Thu, 1/8/09, David Allan

<[email protected]> wrote:



tar cf - /source/directory | ( cd

/backup/directory ; tar

xvf - )


This is probabably obvious, but having shot myself in

the foot with it in the past, I can't let this go by
without pointing it out. If you try this approach, be
absolutely sure you use

tar cf - ./source/directory

The example here looks like you're using a full,

absolute path name starting at root for your source
directory. If you write that using a pipe, it goes right
back where it started, not to /backup/directory you've
just changed into.

Been there, done it to myself, spent a very long

weekend recovering the file system.

Kathryn



-----------------------------------------------------------

This email address, [email protected], is my

primary

email address. If you encounter difficulty with this

address,

I can also be reached at [email protected]


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