Backup: NewBee Question

[MirJafar Ali]

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 ?

I hope Ubuntu community is not offended by this silly question.

Thanks.
Mir
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