https://yamoe.tistory.com/530
https://bamdule.tistory.com/57
yum list java-1.8.0-openjdk-devel*
설치가 완료되면 /usr/bin/경로에 java가 생성됩니다.
yum install java-1.8.0-openjdk
yum install java-1.8.0-openjdk-devel
/usr/bin/java 경로에 심볼릭링크가 걸려있기 때문에 실제 경로를 찾아서 환경변수에 등록해주어야 합니다.
# readlink -f /usr/bin/java
/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.242.b08-0.el7_7.x86_64/jre/bin/java
> vi ~/.bashsrc
# Java
export PATH=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.222.b10-0.el7_6.x86_64/bin:$PATH
export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.222.b10-0.el7_6.x86_64
> source ~/.bashsrc
echo $PATH
echo $JAVA_HOME