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To: David Miao <davmiao@gmail.com>
References: <979f20140511232256y3baf20aes660bf4f2aa4c8b4a@mail.gmail.com>
From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org>
Date: 25 Nov 2005 10:05:52 -0500
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Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org>
Subject: Re: Package upgrade
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David Miao <davmiao@gmail.com> writes:

> Hi list,
> 
> I have already installed 'python-2.4.1_3.tbz' package from FreeBSD6.0
> i386 disc 2, may I use below command to install the up-to-date python
> 2.4.2 without uninstall old version in advance?
> 
> # cd /usr/ports/lang/python  (I have downloaded the latest CVS tree)
> # make install clean
> 
> or
> 
> # pkg_add -r python

You need to delete the old one before installing the new one.  
portupgrade or portmanager will take care of these aspects for you.