sudo apt-get install git-core gnupg flex bison gperf build-essential curl gcc-multilib g++-multilib libc6-dev-i386 lib32ncurses5-dev lib32z1-dev ccache libgl1-mesa-dev xsltproc schedtool pngquant unzip maven openjdk-8-jdk

mkdir ~/bin

git clone https://gerrit-googlesource.lug.ustc.edu.cn/git-repo.git

cp git-repo/repo ~/bin/

sudo gedit /etc/profile

alias repo="~/bin/repo"
export USE_CCACHE=1
export CCACHE_DIR=/media/changyuet/cache/ccache

cd /media/changyuet/android/
mkdir CM14.1
cd CM14.1
repo init -u https://github.com/LineageOS/android.git -b cm-14.1

repo sync --no-clone-bundle -c -j4

prebuilts/misc/linux-x86/ccache/ccache -M 50G
lunch

make -j8 otapackage
or
brunch xxx