CentOS installation JDK, configuration environment variables

1. Verify if there is an installation

Java-version

2. If you need to upgrade a new version of the JDK or want to reinstall the JDK, you need to uninstall the original JDK first

Yum-y Remove java*

3. View the list of Java resources in Yum source
Command: yum list java*

4. Select Version Installation

yum -y install java-1.8.0*

5, check the location and index, find the installation directory, easy to configure the Java environment variables

which Java

6. Enter the system environment variable file

Vim/etc/profile

7. Add Configuration

List of the fifth steps in export java_home=

Export JRE_HOME=${JAVA_HOME}/JRE
Export Classpath=${java_home}/lib:${jre_home}/lib
Export Path=${java_home}/bin: $PATH

8. Make the configuration in the file effective

Source/etc/profile

9. Verification

Java-version

CentOS installation JDK, configuration environment variables