Java

Install Oracle Java 1.8 on CentOS 7

Remove everything Java if needed.

sudoo yum -y remove java*

Download Oracle Java .rpm

https://www.oracle.com/java/technologies/javase/javase8-archive-downloads.html

Install:

sudo rpm -ivh jdk-8u202-linux-x64.rpm

Check:

rpm -q --whatprovides java

java -version

If installing more versions of Java, choose default.

sudo update-alternatives --config java

Add enviromentals

Edit file:

nano /home/user/.bash_profile

Add following at the end:

export JAVA_HOME=/usr/java/jdk1.8.0_202-amd64
export PATH=$JAVA_HOME/bin:$PATH

Edit:

nano /etc/environment

Add:

JAVA_HOME="/usr/java/jdk1.8.0_202-amd64"

Check:

echo $JAVA_HOME