1. Java 11 설치 꼭 꼭 꼭 Java 11로 설치하자 ! -- jdk 설치 yum install java-11-openjdk-devel.x86_64 -- 환경변수 등록 readlink -f /usr/bin/java /usr/lib/jvm/java-11-openjdk-11.0.20.0.8-1.el7_9.x86_64/bin/java vi /etc/profile -- 최하단 추가 [쉬프트 + G] export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-11.0.20.0.8-1.el7_9.x86_64 export PATH=$PATH:$JAVA_HOME/bin export CLASSPATH=$JAVA_HOME/jre/lib:$JAVA_HOME/lib/tools.jar -- 저장 ..
