安装完ruby环境后，安装redis接口时报错：redis requires Ruby version >= 2.2.2.的解决

约定不等于承诺〃 2022-06-02 11:43 321阅读 0赞

在执行gem install redis时，报错：

1.  gem install redis  
2.      ERROR:  Error installing redis:  
3.              redis requires Ruby version >= 2.2.2.

这句话的意思是，安装redis需要ruby版本最低是2.2.2，而centos yum库中ruby版本支持到2.0.0。所以，无法满足需求。

1、安装RVM

1.  gpg2 --keyserver hkp://keys.gnupg.net --recv-keys D39DC0E3  
2.      curl -L get.rvm.io | bash -s stable  
3.      find / -name rvm -print

2、查看rvm库中已知的ruby版本

rvm list known

MRI Rubies   
\[ruby-\]1.8.6\[-p420\]   
\[ruby-\]1.8.7\[-head\] \# security released on head   
\[ruby-\]1.9.1\[-p431\]   
\[ruby-\]1.9.2\[-p330\]   
\[ruby-\]1.9.3\[-p551\]   
\[ruby-\]2.0.0\[-p648\]   
\[ruby-\]2.1\[.10\]   
\[ruby-\]2.2\[.6\]   
\[ruby-\]2.3\[.3\]   
\[ruby-\]2.4\[.0\]   
ruby-head

3、安装一个ruby版本

1.  rvm install 2.7.5

No checksum for downloaded archive, recording checksum in user configuration.   
ruby-2.3.3 - \#extracting rubygems-2.6.12….   
ruby-2.3.3 - \#removing old rubygems………   
ruby-2.3.3 - \#installing rubygems-2.6.12…………………….   
ruby-2.3.3 - \#gemset created /usr/local/rvm/gems/ruby-2.3.3@global   
ruby-2.3.3 - \#importing gemset /usr/local/rvm/gemsets/global.gems…………..|   
ruby-2.3.3 - \#generating global wrappers……..   
ruby-2.3.3 - \#gemset created /usr/local/rvm/gems/ruby-2.3.3   
ruby-2.3.3 - \#importing gemsetfile /usr/local/rvm/gemsets/default.gems evaluated to empty gem list   
ruby-2.3.3 - \#generating default wrappers……..   
ruby-2.3.3 - \#adjusting \#shebangs for (gem irb erb ri rdoc testrb rake).   
Install of ruby-2.3.3 - \#complete   
Ruby was built without documentation, to build it run: rvm docs generate-ri

4、使用一个ruby版本

1.  rvm use 2.3.3

Using /usr/local/rvm/gems/ruby-2.3.3  
5、设置默认版本

rvm use  2.3 . 3  -- **default**

6、卸载一个已知版本

rvm remove  2.0 . 0

7、查看ruby版本

ruby --version

ruby 2.3.3p222 (2016-11-21 revision 56859) \[x86\_64-linux\]

8、安装redis

gem install redis

Fetching: redis-4.0.1.gem (100%)  
Successfully installed redis-4.0.1  
Parsing documentation for redis-4.0.1  
Installing ri documentation for redis-4.0.1  
Done installing documentation for redis after 0 seconds  
1 gem installed

完成！！！