我安装了一个新的Xubuntu 14.04虚拟机,并安装了Ruby Version Manager(rvm)。 尝试安装SASS gem时,出现以下错误: $ rvm use 2.0 RVM is not a function, selecting rubies with 'rvm use ...' will not work. You need to change your terminal emulator preferences to allow login shell. Sometimes it is required to use `/bin/bash --login` as the command. Please visit https://rvm.io/integration/gnome-terminal/ …