In message 
          Martin Gregorie  wrote:

> On Sat, 13 Feb 2021 16:22:24 +0000, David Higton wrote:
>
> > This build is just over a month old, which reminds me it's time I updated
> > it again.
> >
> A weekly update is better - there have been and are quite a lot of
> security holes being discovered and fixed recently.
>
> My personal recommendation: turn off any automatic updates you might have
> configured and every week make a backup using rsync [1] followed
> immediately by a Raspbian update and reboot.
>
> [1] use rsync because its about the fastest backup program. On an RPi
> using a SD filing on an 8-18GB card system you may as well back up
> everything, but really, all you need to backup is /home *provided that*
> you keep copies of every file you change in /etc in a special directory
> structure in /home or in your usual login.
>
> I use a pair of 1TB WD Essentials portable USB drives for two generations
> of backups, but of course ymmv - you can equally use a couple of SD  cards,
> but they may fail silently - while a portable SSD or HDD is more  likely to
> give you warnings, particularly if you fsck it as the last  action in every
> backup run. Note:
>
> - Write a shell script to automate the backup process - makes life a
>  lot easier
> - Using a set of biggish backup devices and makes it easy to back up
>  several systems onto a single device set of HDDS or SSDs.
> - Always keep the backup set offline, preferably in a firesafe or in a
>  separate building or garden shed.

I don't think you read what I posted, Martin.  I use RISC OS.

David

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