Are you running a live CD session and trying to upgrade that? One should not do that, as it's not supported to dist-upgrade CDs.
cp: cannot create regular file '/cdrom/casper/initrd.gz.new': No such file or directory dpkg: error processing package udev (--configure): subprocess installed post-installation script returned error exit status 1
Are you running a live CD session and trying to upgrade that? One should not do that, as it's not supported to dist-upgrade CDs.
cp: cannot create regular file '/cdrom/ casper/ initrd. gz.new' : No such file or directory
dpkg: error processing package udev (--configure):
subprocess installed post-installation script returned error exit status 1