[root@k8s-master1 ~]# cat install_java.sh
#!/bin/bash
#java
java_file="jdk-8u301-linux-x64.tar.gz"
tar -zxf $java_file -C /usr/local/
ln -s /usr/local/jdk* /usr/local/java
cat >>/etc/profile<< EOF
#java_path
export JAVA_HOME=/usr/local/java/
export JRE_HOME=\${JAVA_HOME}/jre
export CLASSPATH=.:\${JAVA_HOME}/lib:\${JRE_HOME}/lib
export PATH=\${JAVA_HOME}/bin:$PATH
EOF
#source /etc/profile
[root@k8s-master1 ~]# source /etc/profile
[root@k8s-master1 ~]# java -version
java version "1.8.0_301"
Java(TM) SE Runtime Environment (build 1.8.0_301-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.301-b09, mixed mode)
