1. Centos description
Linux is an operating system. Centos, Fedora, and RedHat can be understood as "brands." The core of the operating systems of these "brands" are all Linux systems, but You may make some extensions and add some of your own features.
2. Installation steps
(1) First, transfer the linux version of java8 compressed package to linux via ftp On the server
(2)Create the installation directory
mkdir /usr/java/
(3)Extract to the installation directory
tar -zxvf jdk-8u171-linux-x64.tar.gz -C /usr/java/
(4)Set the environment variable
Open the file
vim /etc/profile
Add
export JAVA_HOME=/usr/java/jdk1.8.0_171
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH at the end to make the environment variable take effect
source /etc/profile
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