"https://rvm.io/rvm/install":https://rvm.io/rvm/install/

$ sudo apt-get install git-core curl
$ bash -s stable < <(curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer)
$ echo "source \"$HOME/.rvm/scripts/rvm\"" >> $HOME/.bashrc
$ source ~/.bashrc
$ rvm -v

        rvm 1.15.7 (stable) by Wayne E. Seguin <wayneeseguin@gmail.com>, Michal Papis <mpapis@gmail.com> [https://rvm.io/]
    

        $ rvm pkg install zlib      // 为避免在安装Jekyll时报cannot load such file -- zlib，先安装zlib
        $ rvm pkg install iconv     // 避免出现iconv will be deprecated in the future, use String#encode instead.
        $ rvm install *1.9.3*
        $ rvm use *1.9.3*
        $ ruby -v
    

        ruby 1.9.3p194 (2012-04-20 revision 35410) [i686-linux]
    

        $ gem install jekyll
        $ gem install RedCloth