On Sat, 09 Feb 2008 10:04:37 +1300 (NZDT)
Nick Rout <[EMAIL PROTECTED]> wrote:
>
> On Sat, February 9, 2008 9:20 am, Roger Searle wrote:
> > Hi, I have a script that does a wget on a website, which is working
> > well. Before the wget command I am moving the folder that already exists:
> >
> > mv $HOME/documents/newsite $HOME/documents/newsite-old
> >
> > which is fine. So long as the folder newsite-old doesn't already exist
> > because the script had previously been run and the folder exists. If it
> > does, I'd get the following:
> >
> > mv: cannot move `/home/roger/documents/newsite/' to a subdirectory of
> > itself, `/home/roger/documents/newsite-old/newsite'
> >
> > What I would really like to do is be retaining each of the previous
> > copies of the newsite-old folder, and having the script append an
> > increasing number to the folder name each time it ran, ie newsite-old1
> > then newsite-old2 etc.
> >
> > How could I modify the mv command so that it did this for me?
> >
> > Hoping this makes sense,
> > Roger
> >
> >
>
>
> possibly by either:
>
> a) testing what folders exist and naming the new folder by maximum +1, but
> the programming of that doesn't immediately spring to mind, note that if
> you use one digit you will soon run out of namespace, start at 00, 01 etc
> and you will get at least 100; or
>
> b) adding the date and time of the fetch to the dir name, like:
>
> mv $HOME/documents/newsite $HOME/documents/newsite-${date +%F}
>
> date +%F returns 2008-02-09 today, so they will naturally sort in date
> order. If you are going to od this more than once a day, come up with a
> date string that adds the time too (see man date, its very flexible).
>
>
> --
> Nick Rout
>
Item b) is the approach I've always used. I create a date related subdirectory
and backup to there. I then use a symbolic link for current to you can find the
last backup easily .
The disadvantage to this is that you need to manage the backups in some way,
otherwise they'll eventually fill the disk. If that's a problem, look at the
logrotate scheme, and how it's done there.
Steve
--
Steve Holdoway <[EMAIL PROTECTED]>
