ruby

Alternative way to install ruby, by RVM,（ highly recommended）:

 bash -s stable < <(curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer)
 echo '[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" # Load RVM function' >> ~/.bash_profile
 source ~/.bash_profile
 rvm install 1.9.2
 rvm use 1.9.2 --default

参考：https://blog.csdn.net/JimyJimang/article/details/7195388