Questions with rsync
Cameron Simpson
cs at zip.com.au
Wed Jun 3 22:13:19 UTC 2009
On 03Jun2009 11:00, Rick Stevens <ricks at nerd.com> wrote:
> GMS S wrote:
> I use this sort of thing with a 500GB USB drive (automounted at
> "/media/500GB-Drive" by Gnome):
>
> #!/bin/bash
> # Back up system to a specific directory given on the command
> # line or a default based on today's date. Excludes the /proc,
> # /sys, /dev and /media directories
> MYHOST=`hostname`
> TODAY=`date +%d-%b-%Y`
> if [ $# -lt 1 ]; then
> TGT="/media/500GB-Drive/$MYHOST-BackUp-$TODAY"
> else
> TGT=$1
> fi
>
> rsync -avXA --exclude-from=/etc/skipdirs.rsync / $TGT
>
> with /etc/skipdirs.rsync containing:
[...]
I use an extra level of complexity on top of this approach: I hard link
the previous backup directory to the new date, then rsync to the new
date. This makes the cost-per-backup just the incremental cost of
changed files; unchanged files are thus hardlinked from the previous
backup.
Code here:
http://www.cskk.ezoshosting.com/cs/css/bin/histbackup
Then:
mkdir -p /media/500GB-Drive/backups
histbackup -x / /media/500GB-Drive/backups -X
Histbackup automatically honours a .hbinclude file in the
backup area as an '--include-from' option, so you'd set up
/media/500GB-Drive/backups/.hbinclude as required.
There's a bunch of similar rsync-based backup scripts on the web for
this purpose.
Cheers,
--
Cameron Simpson <cs at zip.com.au> DoD#743
http://www.cskk.ezoshosting.com/cs/
There's a fine line between cleverness and stupidity.
- Nigel Tufnel, _Spinal Tap_
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