Prev: Building TeX Live on -current
Next: seamonkey 2.0.3 upgrade on 12.2
From: JohnF on 10 Mar 2010 07:54
Mike Jones <Not(a)arizona.bay> wrote:
> Responding to Ewald Pfau:
>> Mike Jones <Not(a)arizona.bay>:
>>> Responding to Ewald Pfau:
>>
>>>> But quite sure, it won't move a whole tree, selectively, to a
>>>> 'deleted'-destination, which is a third path, additionally to source
>>>> and target.
>>>
>>> Er, Eh?
>>
>> After rsync from source to target -> target-path is a clone of
>> source-path. And -> Anything different, that has been in target-path, is
>> now in 'deleted'-path (so, has been moved selectively.)
>
> Ok, but with "cp --backup=numbered" you get copies of the replaced files
> tagged with numbered suffixes. Whack away as many times as you like, and
> you get just as many numbered backups. Isn't that a /useful/ thing?

Can be very useful. VMS has a similar "version" feature built into the
OS's shell (DCL), so that the complete specification of file name.ext
is actually name.ext;1 or name.ext;2, etc, highest number = most recent.
If you refer to name.ext without an explicit ;version suffix then you
get the most recent (except that deleting demands an explicit version
or name.ext;* to delete them all). Editing name.ext creates a new
version when you write it, as does copying anything to name.ext, etc.

> I'm not seeing or experiencing a problem with "cp -backup=numbered" and
> its an easy enough thing to bulk-delete all *~x~ files when done.

Even better, VMS has a purge command, so purge name.ext keeps the
most recent. And purge/keep=3 name.ext keeps the three most recent.
(There seems to me to be lots of useful VMS command-line stuff that
Unix shells could reasonably easily implement.)
--
John Forkosh ( mailto: j(a)f.com where j=john and f=forkosh )
From: tapp on 10 Mar 2010 11:28
I prefer rsync for cloning running systems because of "--exclude" (for /
proc, /sys, /tmp, *.pid, etc) and/or "--one-file-system" (for nested
mounts to be separated on the destination drive).

Also, rsync alphabetically sorts the files before writing. ;-)

--
Arnd
From: Mike Ranque on 10 Mar 2010 12:28
Responding to tapp:

> I prefer rsync for cloning running systems because of "--exclude" (for /
> proc, /sys, /tmp, *.pid, etc) and/or "--one-file-system" (for nested
> mounts to be separated on the destination drive).
>
> Also, rsync alphabetically sorts the files before writing. ;-)


cp has a one-file-system flag, and a simple bash script could avoid dirs
you don't want to copy across.

It seems to be a horses-for-courses and personal preferences thing to me.

--
*=( http://www.thedailymash.co.uk/
*=( For all your UK news needs.
First  |  Prev  | 
Pages: 1 2 3 4
Prev: Building TeX Live on -current
Next: seamonkey 2.0.3 upgrade on 12.2