安装 ruby
yum install ruby
yum install gcc g++ make automake autoconf curl-devel openssl-devel zlib-devel httpd-devel apr-devel apr-util-devel sqlite-devel
yum install ruby-rdoc ruby-devel
yum install rubygems
安装 fluentd-ui
gem install -V fluentd-ui
错误和解决
error failed to build gem native extension. centos
需要1.9 的 ruby
