Newbie Question About System Update

[Bill Moran]

On Tue, 19 Apr 2005 16:34:37 -0600 (MDT)
Warner Losh <imp at bsdimp.com> wrote:

> From: Bill Moran <wmoran at potentialtech.com>
> Subject: Re: Newbie Question About System Update
> Date: Tue, 19 Apr 2005 16:32:37 -0400
> 
> > Chuck Swiger <cswiger at mac.com> wrote:
> > > Bill Moran wrote:
> > > > The system can not replace programs that are in use,
> > > 
> > > This is generally not the case.  Unix lets you continue to access a file after 
> > > it has been deleted, so long as the process hangs on to a file descriptor. 
> > > This lets you replace programs in use, without running into the same problems 
> > > that platforms like Windows have.
> > 
> > What you say?:
> > 
> > bash-2.05b$ su
> > Password:
> > bolivia# cp /usr/sbin/cron /home/wmoran/.
> > bolivia# cp /home/wmoran/cron /usr/sbin/.
> > cp: /usr/sbin/./cron: Text file busy
> > bolivia# 
> 
> mv /usr/sbin/cron /usr/sbin/cron-
> cp /blah/cron /usr/sbin/cron
> 
> install does this behind the scenes. 

I suppose I have to stand corrected.

Thanks for putting me straight.

-- 
Bill Moran
Potential Technologies
http://www.potentialtech.com