I would like to attempt an online upgrade of an XO-4 B1 from build 5 to build 6 (mostly to see if it works). extrapolating from the info at http://wiki.laptop.org/go/13.1.0#Online_upgrade I tried sudo olpc-update 13.1.0d_xo4-6 but the build was not found on updates,laptop.org Is this the right syntax? Thanks for your help. cjl