How can I install ruby 2.2.1 if I am on 2.2.2?

Question

如果我目前在2.2.2上，如何安装ruby 2.2.1 ...我需要回退一个版本，因为ruby 2.2.2似乎在终端中加载我的项目时遇到了一些问题。

Answer 1

RVM is a version management system that does exactly this.

https://rvm.io/

Once you install see the faqs

https://rvm.io/rvm/basics

Answer 2

An option for Ruby version management is rbenv . I prefer it to RVM because it's not as intrusive (it doesn't need to be loaded into your shell, it doesn't override shell commands, it doesn't manage gemsets, etc.).

---

In your case, to install an older Ruby version, you can do the following, once rbenv is installed:

Check for available Ruby versions:

rbenv install -l

The above should show a list of all versions available (in your scenario, 2.2.1 should be an available option). Then once you have picked out a version you wish to install, the following command can be run next:

rbenv install 2.2.1

Finally, To switch between ruby versions you can run:

rbenv local 2.2.1

Or to set Ruby 2.2.1 to be default globally:

rbenv global 2.2.1

More info, such as installation instructions, can be found in the README

Hope that was helpful to you!

Answer 3

Ruby版本管理的另一个选择是chruby 。