Stella SDK first time installers:
$ cd /opt
$ git clone https://github.com/morningtec/StellaSDK.git
$ /opt/StellaSDK/bin/stella-config --install
And also, You can clone form oschina's repository:
$ cd /opt
$ git clone http://git.oschina.net/morningtec/StellaSDK.git
$ /opt/StellaSDK/bin/stella-config --install
Updating Stella SDK to r2.3
$ cd /opt/StellaSDK
$ git fetch origin
$ git reset --hard origin/r2.3
$ /opt/StellaSDK/bin/stella-config --install
Refer to the Getting Started Guide after the installation: http://www.morningtec.cn/en/docs/getting-started.php