安装ruby一定要注意的一步（ruby -v和 rbenv version结果不一致）

https://github.com/rbenv/rbenv#installation

安装ruby的第三步

Run

~/.rbenv/bin/rbenv init

for shell-specific instructions on how to initialize rbenv to enable shims and autocompletion.

[webuser@iZ94aiq7f6cZ history-book]$ ~/.rbenv/bin/rbenv init

# Load rbenv automatically by appending

# the following to ~/.bash_profile:

eval "$(rbenv init -)"

注意：这句话需要手动添加到~/.bash_profile中，用指令执行后只在当前窗口生效

[webuser@iZ94aiq7f6cZ ~]$ ruby -v

ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-linux]

[webuser@iZ94aiq7f6cZ ~]$ rbenv versions

system

* 2.3.0 (set by /home/webuser/.rbenv/version)