打开终端，然后去编辑>配置文件首选项，然后去标签“标题和命令”，并检查“运行命令作为登录Shell”。

启动一个Bash，现在你可以直接从终端安装Gems，而不使用sudo和错误“RVM不是一个函数，选择红宝石与' RVM使用…”将被淘汰。

欢呼。

您需要运行以下命令

$ source ~/.rvm/scripts/rvm

然后运行这个

$ type rvm | head -n 1

如果你得到

rvm is a function

问题解决了。

您还需要运行user$ rvm requirements以查看操作系统的依赖项要求

来源:https://rvm.io/rvm/install/

我忘记提到你需要把这个代码到你~/。Bashrc或~/。ZSHRC文件，您将不需要再次编写此代码。

对于那些有同样问题的人，他们像我一样使用lubuntu，我点击了这个链接:

你以

lx终端-e“bash -il”

感谢@mpapsis给我指明了正确的方向

打开终端，然后去编辑>配置文件首选项，然后去标签“标题和命令”，并检查“运行命令作为登录Shell”。

启动一个Bash，现在你可以直接从终端安装Gems，而不使用sudo和错误“RVM不是一个函数，选择红宝石与' RVM使用…”将被淘汰。

欢呼。

以上答案都是正确的。但当我面对同样的问题时，解决方案如下:

Update ZSH. (Tried to update directly din't work for some reason. So uninstalled and reinstalled updated version from here) Set default shell as zsh (i.e. if you prefer zsh) using sudo chsh -s $(which zsh) $USER Ensure that the following code is at the bottom of your .zshrc after you have installed the latest RVM probably using CURL from official RVM site [[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" source ~/.profile MOST IMPORTANT POINT: Ensure that in your .zshrc file every export to PATH is appended with :$PATH. Which i believe was the root of my problems even after following the above steps. post this all my problems of RVM Not being a function went away. If it still does not work, give some error trace over here. After a few hours of struggle to solve this issue, i'm sure i must have seen all related errors.

希望能有所帮助。干杯!

正如您所说，所显示的错误可能是以下错误。

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/ for a example.

如上所述，只需在您的终端中输入'/bin/bash——login'(重启终端后)，然后键入命令'rvm use 1.9.3'(例如)，它将开始使用相同的版本。

只需执行命令'ruby -v'来确认RVM使用的是ruby的更新版本。