http://wiki.wandboard.org/Getting_started_with_Yocto_on_Wandboard

install repo

ubuntu 16.04

$apt-get install repo

$repo init -u https://github.com/Freescale/fsl-community-bsp-platform -b fido --repo-url=git://codeaurora.org/tools/repo.git

$repo sync

ubuntu 14.04

$mkdir ~/bin
$PATH = ~/bin:$PATH
$curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo
$chmod a+x ~/bin/repo

// 如果上述 URL 不可訪問，可以用下面的：
//curl https://storage-googleapis.lug.ustc.edu.cn/git-repo-downloads/repo > ~/bin/repo