[toc] 一、 jdk 安装配置# yum install java-1.8.0-openjdk-devel (依赖的java-1.8.0-openjdk,java-1.8.0-openjdk,headless也会被安装 ) # alternatives -h # vim /etc/profile.d/java.sh # 加入 export JAVA_HOME=/usr # . /e...