erlang 安装命令
sudo apt-get install build-essential m4 libncurses5-dev libssl-dev xsltproc fop
axel -n 20 http://www.erlang.org/download/otp_src_R13B04.tar.gz
tar xfvz otp_src_R13B04.tar.gz
cd otp_src_R13B04/
./configure --with-ssl
sudo make install
