1.jdk-8u162-linux-x64.tar.gz
Ubuntu 14.04安装JDK1.8.0_25与配置环境变量
https://www.linuxidc.com/Linux/2015-01/112030.htm
Ubuntu 下jdk的环境变量配置（解决了重启电脑后失效的问题！）
https://blog.csdn.net/eastlhu/article/details/9313069
2.rpm
rpm -ivh jdk-8u45-linux-x64.rpm 进行安装
Ubuntu无法安装rpm包，ubuntu RPM should not be used directly install RPM packages, use Alien instead!
https://blog.csdn.net/suleil1/article/details/49471723