it will not work. You have to edit /etc/apt/sources.list file. Like <pre>deb file:/root debs/ in /root here will be your location where you have copy the disk content. For more info <a href="http://www.debian.org/doc/manuals/apt-howto/ch-basico.en.html">APT How to</a> </pre>---------------------------------------------------------- <a href="http://forums.linuxdesh.com/member.php?action=register&referrer=3%20" target="_blank">Dedicated Linux Forum in Bangladesh</a> Thank you Md Ashickur Rahman Volunteer, Foundation for Open Source Solutions Bangladesh. <div class="gmail_quote">On Mon, Oct 17, 2011 at 9:46 AM, Tapas Mishra <<a href="mailto:mightydreams@gmail.com">mightydreams@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> I want to upgrade 11.04 to 11.10 I have downloaded alternate ISO on a USB. In update manager GUI---> Add volume while USB is inserted and I click add volume I get Please insert a disk in drive. Why is there a default assumption that some one will Upgrade from a CDROM only. Can't it be a USB (in my case) and then I get an error Error scanning the CD E:Unable to stat the mount point /media/cdrom/ -stat( 2: No such file or directory), E:Unable to stat the mount point /media/cdrom -stat (2: No such file or directory), E: failed to mount the CDROM. and then I can not proceed. I have alternate ISO of 11.10 on a USB stick and want to upgrade from the USB is it possible? ------------------------------ Tapas -- ubuntu-users mailing list <a href="mailto:ubuntu-users@lists.ubuntu.com">ubuntu-users@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-users" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-users</a> </blockquote></div>