Backup: NewBee Question

[Colin Law]

On 15 November 2010 21:27, MirJafar Ali <mirjafarali at gmail.com> wrote:
> Hello,
>
> Sorry for asking a stupid question. There are so many software for backup
> data and even the Seagate hardrives
> provide software with jazzy word "continuous backup"
>
> I am old Unix person and know only "cp" command. I am curious to know why
> there are so many backup software.
> Isn't "cp" command enough for making copies of the data. What are the
> compelling reasons to use backup software ?
>
> Even in the Unix world, what is the difference between "cp" and "rsync"
> command ?
>

The difference is that cp copies files from one place to another,
rsync works by magic however to synchronise the contents of two files,
which may be on opposite sides of the world, without actually
transferring any data.

Well not much anyway.

See http://oceanpark.com/webmuseum/rsync.html

Colin