在执行gem install redis时
提示:
提示:
gem install redis ERROR: Error installing redis: redis requires Ruby version >= 2.2.2.
查了查资料,CentOS7 yum库中ruby的版本支持到 2.0.0,可gem 安装redis需要最低是2.2.2,自己编译的ruby源码,再执行还是报错…最后google结合几篇文章解决了:
采用rvm来更新ruby:
采用rvm来更新ruby:
1.安装RVM:
gpg2 --keyserver hkp://keys.gnupg.net --recv-keys D39DC0E3 curl -L get.rvm.io | bash -s stable find / -name rvm -print /usr/local/rvm /usr/local/rvm/src/rvm /usr/local/rvm/src/rvm/bin/rvm /usr/local/rvm/src/rvm/lib/rvm /usr/local/rvm/src/rvm/scripts/rvm /usr/local/rvm/bin/rvm /usr/local/rvm/lib/rvm /usr/local/rvm/scripts/rvm #source /usr/local/rvm/scripts/rvm
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
#rvm install 2.3.3 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
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 Using /usr/local/rvm/gems/ruby-2.3.3
6.卸载一个已知版本
查看ruby版本:
rvm remove 2.0.0
查看ruby版本:
ruby --version ruby 2.3.3p222 (2016-11-21 revision 56859) [x86_64-linux]
安装redis:
gem install redis Fetching: redis-4.0.0.gem (100%) Successfully installed redis-4.0.0 Parsing documentation for redis-4.0.0 Installing ri documentation for redis-4.0.0 Done installing documentation for redis after 1 seconds 1 gem installed