Arndale Octa develop Environment : Ubuntu 12.04 x64 + vmware 1.about repo,the offical wiki has some wrong,i give a correct repo file here. download the repo 1.12 from https://code.google.com/p/git-repo/downloads/detail?name=repo-1.12&can=1&q= and then $ repo init -u git://git.insignal.co.kr/insignal/arndale_octa-jb_mr1.1/android/manifest -b jb-mr1.1 $ repo sync it success ! 2.about dir u-boot and kernel these two files are copied from offical git repo. 3.u-boot-linaro && kernel-linaro is the android source(4.4.2) code of linaro ,and i give some comments about it.maybe is useful for some newbies.