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Description of problem:
    When adding new diskless environment system-config-netboot
suggests to use 'rsync -a -e ssh CLIENTIP:/ DISKLESSDIR/root'. This
does (at least with FC3t1 it did) copy /proc too, which is wrong. I
think the suggested command should be 'rsync -a -e ssh
--exclude='/proc/*' CLIENTIP:/ DISKLESSDIR/root'. I would like adding
a '-v', so the user can have some progress indicator.

Version-Release number of selected component (if applicable):
system-config-netboot-0.1.3-7

How reproducible:
Always

Steps to Reproduce:
1. start system-config-netboot
2. add new environment
3. see and test the suggested 'rsync' command


Actual Results:  In DISKLESSDIR/root you get a copy of /proc too
(everything that can be read from there - mem, kernel...).

Expected Results:  In DISKLESSDIR/root only an empty /proc is needed

Additional info:

    I think the diskless environment should have empty /proc /tmp,
/var/tmp and only empty files in /var/log. 'rpm --rebuilddb' and 'rm
-f /var/lib/rpm/__db.00?' are a good addition too (in the diskless
environment). When booting the diskless client it complains it can not
remove '/var/lib/rpm/__db.00?'.
    Any remaining files in these directories can be a security problem
too.