Spark now has been updated to 3.0.0, we can only go to the official website to download already downloaded version 3.0.0 and 2.4.5
So how to do it if you want to download the version history?
示例如下，如果想要下载其他版本，手动修改版本号即可：
wget http://d3kbcqa49mib13.cloudfront.net/spark-2.1.0-bin-hadoop2.6.tgz
