当我sudo apt-get install ruby-full build-essential在终端中使用“ ”时，我得到了这个：
$ sudo apt-get install ruby-full build-essential
Reading package lists... Error!
E: Encountered a section with no Package: header
E: Problem with MergeList /var/lib/apt/lists/packages.medibuntu.org_dists_quantal_non-free_binary-i386_Packages
E: The package lists or status file could not be parsed or opened.
谁能告诉我如何在我的 Linux Mint 机器上安装 Ruby on Rails？