Re: dirs mirror

[Darac Marjal <mailinglist@darac.org.uk>]

On Mon, Sep 25, 2017 at 09:57:54PM +0200, Pol Hallen wrote:
> Hi folks :-)
>
> I'd like create a mirror between 2 dirs: one local dir
>
> /home/user/testA
>
> and
>
> /home/user/testB
> this "testB" is a samba mounted share dir (//ip/remote_share 
> /home/user/testB)
>
> any idea?

It depends on how close you want those mirrors to be. If they are 
absolutely identical:

ln -s ../testB /home/user/testA

will create a symbolic link between the two directories. You can 'cd' 
into either testA or testB and see identical files, changes happen 
immediately etc. A symbolic link essentially allows you to give a 
directory a second name.

If this is for backup purposes and you want to periodically bring testB 
up-to-date with testA, then rsync is your best choice:

rsync -avP --delete /home/user/testA /home/user/testB

This is a one-way synchronisation. testB becomes identical to testA, and 
any changes in testB are lost. If you need two-way synchronisation 
(testA and testB have changed, but need to come to a common state), then 
look at the "unison" package.

> thanks for help!
>
> Pol

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