[ILUG] Sync 2 directories on machine

[Conor Daly]

On Tue, Aug 16, 2005 at 08:33:20AM +0100 or so it is rumoured hereabouts, 
Colm Buckley thought:
> On 16 Aug 2005, at 08:31, Colin O'Keeffe wrote:
> 
> >How can I sync two directorys,
> >
> >/home/stuff
> >
> >to
> >
> >/storage/backups/stuff
> >
> >there both on the same machine..
> 
> rsync -av /home/stuff /storage/backups

However, this won't delete files in /storage/backups that no longer exist
in /home/stuff.  If you want that too, add the '--delete' switch.

My home backup consists of an rsync to a removable disk with multiple
versions kept by use of hard links.  It goes like this:

# Create hard links to all files under /backup/current in /backup/1
cp -al /backup/current /backup/1

# Rsync desired filesystem to /backup/current
rsync -a --delete -v -x / /backup/current

Because rsync deletes a file that it is replacing, this results in the
total size of /backup/1 and /backup/current being the size of /backup/1
plus the size of the changes betweet /backup/1 and /backup/current .  My
removable 250Gb disk currently holds 20 snapshots of my systems in the
space of about 2 in this manner.

Script for this task available on request...

Conor
-- 
Conor Daly <conor.daly at oceanfree.net>

Domestic Sysadmin :-)
---------------------
Hobbiton.cod.ie
 08:27:05  up 1 day, 16:49,  1 user,  load average: 0.00, 0.02, 0.00