[ Linux ] AWS Ubuntu Java 8 설치하기

AWS EC2 t2.micro 인스턴트

Ubuntu 18.04.5 LTS

 

1. 업데이트 

sudo apt-get update

2. 자바8 JRE, JDK 설치

sudo apt-get install openjdk-8-jre
sudo apt-get install openjdk-8-jdk

3. 설치후 버전 확인

javac -version
java -version

ubuntu@ip:~$ javac -version
javac 1.8.0_292
ubuntu@ip:~$ java -version
openjdk version "1.8.0_292"
OpenJDK Runtime Environment (build 1.8.0_292-8u292-b10-0ubuntu1~18.04-b10)
OpenJDK 64-Bit Server VM (build 25.292-b10, mixed mode)
ubuntu@ip:~$

4. path 설정 위해 javac 절대경로 확인

which javac
readlink -f /usr/bin/javac

ubuntu@ip:~$ which javac
/usr/lib/jvm/java-8-openjdk-amd64/bin/javac
ubuntu@ip:~$ readlink -f /usr/bin/javac
/usr/lib/jvm/java-8-openjdk-amd64/bin/javac
ubuntu@ip:~$

5. path 설정

sudo vi /etc/profile

export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
export PATH=$JAVA_HOME/bin:$PATH
export CLASS_PATH=$JAVA_HOME/lib:$CLASS_PATH

6. 경로 다시 실행

source /etc/profile

7. 자바 경로 확인

echo $JAVA_HOME
$JAVA_HOME/bin/javac -version

8. CLASSPATH 설정

echo $CLASSPATH
vi /etc/profile

마지막에 추가

...
export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
export PATH=$JAVA_HOME/bin:$PATH
export CLASS_PATH=$JAVA_HOME/lib:$CLASS_PATH
export CATALINA_HOME=/home/tomcat
export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib/tools.jar:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext:.
~

9. 필요한 jar 파일을 다음 폴더에 복사하여 자바 컴파일

/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext