freebsd-update - removing sources of a 7.2 system

Hello,

Two little questions about freebsd-update "best-practices":

1) These are the output when I start a "freebsd-update upgrade" on two different systems. On the first one, everything ok, on the second, the sources are still there and I would like to get rid of them:

sys1:
Code:
The following components of FreeBSD seem to be installed: 
kernel/generic world/base world/dict world/doc world/games world/info world/manpages

sys2:
Code:
The following components of FreeBSD seem to be installed:
kernel/generic src/base src/bin src/cddl src/contrib src/crypto src/etc src/games src/gnu src/include src/krb5 src/lib src/libexec src/release src/rescue src/sbin src/secure src/share src/sys src/tools src/ubin src/usbin world/base world/dict world/doc world/games world/info world/lib32 world/manpages world/proflibs



Just to be sure: is this correct that I can just remove these 2 directories completely:
- /usr/src (500MB)
- /usr/obj/usr/src (1304MB)
and that it would solve my "problem" ? Or is there a list of "installed components" somewhere that should be updated too? (I tried by renaming these 2 dirs and running freebsd-update again and it seemed to work, but I've not found that in the documentations I checked)


2) directory "/var/db/freebsd-update/files" is getting large after a few upgrades (800M-1.2GB): can it be deleted after an upgrade, once I am sure a rollback will not be necessary for example? Or should rather the while directory /var/db/freebsd-update be trashed ?


Thanks & regards,
Olivier


PS: maybe these information would be useful to other? Putting them under http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/updating-upgrading-freebsdupdate.html may be an idea... :)
 
You can safely remove everything in /usr/src & /usr/obj. If you have a custom kernel config you may want to keep copy of that somewhere.

As to freebsd-update I've never used it, but according to the manpage /var/db/freebsd-update is for storing temporary files and downloads.
Once you're happy with an update I suppose you can delete everything in that directory.
 
Thanks for the confirmation, there is no custom kernel (updates via freebsd-update), that's why I don't need the sources at all in this case.
 
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