Installation of JDK1.8 under Linux system tutorial details

1. Cleaning before installation

rpm -qa | grep jdk
rpm -qa | grep gcj
yum -y remove java-xxx-xxx

2. Download JDK online

Command:

[

wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.rpm

]

Download read bar:

To see if there is an JDK installation package under the current folder:

Add execution permission:

Command: chmod +x jdk-8u131-linux-x64.rpm

Perform rpm for installation

Command: rpm -ivh jdk-8u131-linux-x64.rpm

Check to see if JDK was installed successfully

Command: java -version

Check JDK installation path, (1 as the default path: / usr/java/jdk1. 8.0 _131)

Configure the JDK environment variable

1. Edit environment variables

export JAVA_HOME=/usr/java/jdk1.8.0_131
 export JRE_HOME=${JAVA_HOME}/jre
 export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib:$CLASSPATH
 export JAVA_PATH=${JAVA_HOME}/bin:${JRE_HOME}/bin
 export PATH=$PATH:${JAVA_PATH}

2. Edit /etc/profile

Command: vim /etc/profile

3. Environment configuration

Command: i goes into edit mode

Let me paste what I've edited up here

Enter the command: : wq!

Force save and exit

Put profile into effect immediately:

source /etc/profile

conclusion