$ rvm get stable
$ sudo apt-get install curl g++ gcc autoconf automake bison libc6-dev libffi-dev libgdbm-dev libncurses5-dev libsqlite3-dev libtool libyaml-dev make pkg-config sqlite3 zlib1g-dev libgmp-dev libreadline-dev libssl-dev
$ rvm install 2.7.2
如果出现相关依赖错误,可以尝试以下命令:
$ rvm autolibs enable
$ rvm reinstall 2.7.2 --disable-binary