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
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"
其他回答
您的控制台不是作为登录shell运行的，因此不能访问rvm功能。如果你正在运行Ubuntu，你可以:
打开控制台 选择“Edit -> Profile Preferences” 选择页签:标题和命令 复选框“作为登录shell运行命令” 重启终端
我认为这是更通用的解决方案
echo 'source "$HOME/.rvm/scripts/rvm"' >> ~/.bashrc
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.
从新的Ubuntu 16.04安装
1)终端=>编辑=>配置文件首选项
2) Command Tab =>检查作为登录shell的Run命令
3)关闭终端，重新打开终端
rvm --default use 2.2.4
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。
