sbt 是 scala 的编译工具
安装：
curl https://bintray.com/sbt/rpm/rpm > bintray-sbt-rpm.repo
sudo mv bintray-sbt-rpm.repo /etc/yum.repos.d/
sudo yum install sbt
验证：
[root@hadoop01 ~]# sbt
[info] Updated file /root/project/build.properties: set sbt.version to 1.2.8
[info] Loading global plugins from /root/.sbt/1.0/plugins
[info] Loading project definition from /root/project
[info] Updating ProjectRef(uri("file:/root/project/"), "root-build")...
[info] Done updating.
[info] Set current project to root (in build file:/root/)
[info] sbt server started at local:///root/.sbt/1.0/server/27dc1aa3fdf4049b492d/sock
sbt:root>