首先下载Linux版ruby源码“ruby-2.7.0.tar.gz”，上传并解压到/usr/local路径下：

tar -xzvf ruby-2.7.0.tar.gz

安装编译依赖工具，gcc、gcc-c++、gdbm-devel、readline-devel和openssl-devel：

yum install gcc

yum install gcc-c++

yum install gdbm-devel

yum install readline-devel

yum install openssl-devel

编译安装ruby

cd /usr/local/ruby-2.7.0

./configure --prefix=/usr/local/ruby --enable-shared

make && make install

添加ruby环境变量

vi /etc/profile

export RUBY_HOME=/usr/local/ruby/

export PATH=$RUBY_HOME/bin:$RUBY_HOME/lib:$PATH

source /etc/profile

检查ruby环境配置是否正确

ruby -v

gem -v

并检查gem命令是否能正常使用

gem install jekyll