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191 lines
7.4 KiB
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<TITLE>The Answer Guy 50: Using a Downloaded .iso Image for System Upgrade</TITLE>
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<H4>"The Linux Gazette...<I>making Linux just a little more fun!</I>"</H4>
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<H1><A NAME="answer">
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<font color="#B03060">The Answer Guy</font>
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<BR>
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<H4>By James T. Dennis,
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<a href="mailto:linux-questions-only@ssc.com">linux-questions-only@ssc.com</a><BR>
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LinuxCare,
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<A HREF="http://www.linuxcare.com/">http://www.linuxcare.com/</A>
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<!-- begin 43 -->
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<H3 align="left"><img src="../../gx/dennis/qbubble.gif"
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height="50" width="60" alt="(?) " border="0"
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>Using a Downloaded .iso Image for System Upgrade</H3>
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<p><strong>From ljones on Tue, 18 Jan 2000
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</strong></p>
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<!-- ::
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Using a Downloaded .iso Image for System Upgrade
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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:: -->
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<P><STRONG>
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Hello,
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</STRONG></P>
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<P><STRONG>
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I have <A HREF="http://www.redhat.com/">Red Hat</A> 5.2 installed, and have successfully downloaded the
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.iso image for 6.1.
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</STRONG></P>
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<P><STRONG>
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How do I use the image to upgrade?
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</STRONG></P>
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<P><STRONG>
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Lawrence
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</STRONG></P>
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<BLOCKQUOTE><IMG SRC="../../gx/dennis/bbub.gif" ALT="(!)"
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HEIGHT="28" WIDTH="50" BORDER="0"
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>
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Basically you have to burn that image onto a CDR or
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CDRW using '<tt>cdrecord</tt>'
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</BLOCKQUOTE>
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<BLOCKQUOTE>
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Then you can boot from the CD media and do your upgrade.
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</BLOCKQUOTE>
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<BLOCKQUOTE>
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It would be nice if you could just mount the .iso
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image on a loopback block device and run the upgrade
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utility from that. However, I don't think you can
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do that. There's no problem with the mounting part,
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just use a command like:
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</BLOCKQUOTE>
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<BLOCKQUOTE><BLOCKQUOTE><CODE>
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mount -o loop /path/to/....iso /mnt/loop
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</CODE></BLOCKQUOTE></BLOCKQUOTE>
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<BLOCKQUOTE>
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... to mount the <tt>.iso</tt> file as a filesystem. The
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problem is that the installer/upgrader for Red Hat
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is set up to run from the initrd (initial RAM disk)
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or from the init process. I haven't torn it apart
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and looked that closely at it --- but it doesn't
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seem like you can just mount the image, or the CD
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and run the installer/upgrader. You have to boot
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from it.
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</BLOCKQUOTE>
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<!-- sig -->
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<p><em>[ Should be pretty easy to boot from one of its floppy images, then
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point to your loopback mounted drive location as a file source.
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You </em>might<em> have to mount it at /cdrom in order to convince
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the diskette to use it. -- Heather ]</em></p>
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<!-- end 43 -->
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<P> <hr> <P>
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<H5 align="center"><a href="http://www.linuxgazette.com/copying.html"
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>Copyright ©</a> 2000, James T. Dennis
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<BR>Published in <I>The Linux Gazette</I> Issue 50 February 2000</H5>
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<H6 ALIGN="center">HTML transformation by
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<A HREF="mailto:star@starshine.org">Heather Stern</a> of
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Starshine Technical Services,
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<A HREF="http://www.starshine.org/">http://www.starshine.org/</A>
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</H6>
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