Linux installation JDK for Linux system

        1.rpm package installation
? 1 rpm -i jdk-8u91-linux-x64.rpm 2.Configure environment variables
? 1 2 3 4 #Environment variables are configured in /etc/profile file export JAVA_HOME=/Usr/java/jdk1.8.0_91 export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar export PATH=$PATH:$JAVA_HOME/Bin 3. Check the installation status
? 1 2 3 4 # Output configuration environment variable echo $JAVA_HOME #output java installation version java -version
? 1 2 3 4 5 #查Before installing the openjdk packages rpm -qa