列出ruby版本
console:~$ rvm list
rvm rubies
ruby-2.0.0-p481 [ i686 ]
# => - current
# =* - current && default
# * - default
尝试使用特定版本的ruby
console:~$ rvm use 2.0.0
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/ for a example.
当前回答
如果你不想每次打开一个终端都这样，再做一遍上面的建议，只需添加
source ~/.rvm/scripts/rvm
在~/.bashrc的末尾
其他回答
Usually this is caused by shell initialization files. Search for PATH=... entries.
You can also re-add RVM to your profile by running: rvm get stable --auto-dotfiles
To fix it temporarily in this shell session run: rvm use ruby-2.6.5
To ignore this error add "rvm_silence_path_mismatch_check_flag=1" to your "~/.rvmrc" file.
如果RVM安装了专用的ubuntu RVM安装程序https://github.com/rvm/ubuntu_rvm, RVM脚本的路径将不同于/usr/share/rvm/scripts/rvm.因此，要将它添加到你的.bashrc中，运行以下命令:
echo 'source "/usr/share/rvm/scripts/rvm"' >> ~/.bashrc
和其他答案一样的原则，只是觉得这比重新开放终端更快:)
bash -l -c "rvm use 2.0.0"
错误是由于rvm没有像登录shell那样运行。因此试试下面的命令:
/bin/bash --login
你可以在终端登录shell时立即运行rvm命令。
看起来你的rvm没有加载”。bash_profile正确”。我已经在MAC OS X或Ubuntu 14.04中通过打开终端来修复它，并写道:
source ~/.rvm/scripts/rvm
