ubuntu安装Java和MySQL

安装Java
1.添加ppa
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
2.安装jdk8
sudo apt-get install oracle-java8-installer
3.设置系统默认jdk
sudo update-java-alternatives -s java-8-oracle
安装MySQL
sudo apt-get install mysql-server mysql-client