From owner-freebsd-questions@FreeBSD.ORG  Mon Sep 26 21:00:51 2005
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Date: Mon, 26 Sep 2005 22:00:40 +0100
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Subject: Re: Cleanup unused files and other junk ...
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On Monday 26 September 2005 20:50, Kiffin Gish wrote:
> Is there a good and dependable procedure for cleaning up the file
> systems from unused junk that just clutters valuable disc space?
>
> I am already aware of the 'periodic daily' scripts
> 'clear_tmp_enable=YES' option for the rc.conf file, but where else can
> one safely remove files.
>
> For example, is it safe to delete all distfiles?

Deleting *all* distfiles is a bad idea if you plan on keeping your ports up to 
date; the majority of port updates involve applying patches to the same 
source files.

portupgrade comes with a utility called portsclean that will clean out 
unneccessary files from the port system.