설치 경로 확인
# which java
----- java 설치
sudo yum install -y java-1.8.0-openjdk
sudo yum install -y java-1.8.0-openjdk-devel.x86_64
----- java 버전
java -version
----- 설치경로
readlink -f /usr/bin/java
------ 환경설정
vi /etc/profile
JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.332.b09-1.el7_9.x86_64
PATH=$PATH:$JAVA_HOME/bin
echo $JAVA_HOME
.....
export JAVA_HOME PATH