Mac 上brew install ruby 成功安装ruby-2.2.3 但是打ruby -v 依然显示2.0.0

Question

如题!

请教是怎么回事？

Answer 1

You can look at it like this

type ruby

The result should be

/usr/bin/ruby

This is ruby2.0 pre-installed on the system

Use brew install ruby ​​and it will be installed in the /usr/local/Cellar/ruby/2.2.3/bin/rubypath

ruby -v
ruby 2.0.0p481 (2014-05-08 revision 45883) [universal.x86_64-darwin14]
@caoh ➜  ~  /usr/local/Cellar/ruby/2.2.3/bin/ruby -v
ruby 2.2.3p173 (2015-08-18 revision 51636) [x86_64-darwin14]

Answer 2

It is best to use RVM to install Ruby on mac, which is convenient for management and does not require sudo permissions

Answer 3

Just configure the environment variables under your bash_profile. .

But still use rvm to install, otherwise you may encounter strange problems: the original system version will appear inexplicably. .

Answer 4

It’s a matter of path, just change your bash path.

Answer 5

You first use brew info ruby命令看一下有几个版本
然后用brew switch ruby 版本号 就可以切换到指定版本
比如
brew switch ruby 2.2.3
to switch to version 2.2.3
In fact, brew just redoes the soft link