下载Google的身份验证模块: # wget https://google-authenticator.googlecode.com/files/libpam-google-authenticator-1.0-source.tar.bz2 解压缩并编译安装: # tar xvf libpam-google-authenticator-1.0-source.tar.bz2 # cd libpam-google-authenticator-1.0 # make # make install 而后,