Detailed explanation of installing jdk1.8 and configuring environment variables in a Linux-like environment

The configuration is very simple, but I have to check it every time, so I just record it.

1. Preparation before installation

1.1 Create an installation directory. It is usually installed in the /usr/local/jdk8 directory.

mkdir /usr/local/jdk8


1.2 Check whether JDK has been installed. Delete the previous one before installation.

# Check echo $JAVA_HOME through jdk environment variables
# Check the version by java -version

1.3 Download the installation package

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.tar.gz

2. Installation

2.1 Unzip and rename

tar -zxvf jdk-8u131-linux-x64.tar.gz
mv jdk1.8.0_131 jdk1.8

2.2 Configure JDK-related environment variables. The ones circled in red in the middle need to be added. Use the source command to make the configuration file take effect.

vi ~/.bashrc
export JAVA_HOME=/usr/java/latest
export PATH=$PATH:$JAVA_HOME/bin
source ~/.bashrc

2.3 Check whether the configuration is successful. If the jdk version number appears in java -version, the installation and configuration of the environment variables are successful.