Backup question

[CS DBA]

On 3/16/14, 12:33 PM, Matthew Miller wrote:
> On Sun, Mar 16, 2014 at 12:29:16PM -0600, CS DBA wrote:
>> I have an rsync script to backup my entire system each time before I
>> run updates, as versions come & go I try and keep up with which top
>> level directories to backup knowing that some like /proc are
>> virtual...
>> Here's my question:  If I simply backup all directories (including
>> ones like /proc & /media, etc) will the following work, or do I need
>> to care about specifically excluding the virtual directories?
> It might not _hurt_ to back up /proc, /sys, and the like, but it's a waste
> of time and effort since these are all entirely dynamically generated and
> you can't possibly restore them.
>
> You can use rsync -x to keep rsync from crossing filesystems, and then just
> do it separately for each real filesystem you want.
>
> Alternately, you might want to try the new "Fedora Atomic" --
> http://rpm-ostree.cloud.fedoraproject.org/. As the name implies, this lets
> you do atomic updates and switch back if thereis aproblem.
>
Thanks,

where would I find a complete list of the completely dynamic top level 
directories?