[리눅스] JAVA

[리눅스] JAVA

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JAVA 설치

sudo apt-get install openjdk-8-jdk

JAVA Defalut 설치

sudo apt-get install default-jdk

JAVA 확인

java -version

ubuntu@ip-172-31-13-208:~$ java -version openjdk version "1.8.0_312" OpenJDK Runtime Environment (build 1.8.0_312-8u312-b07-0ubuntu1~20.04-b07) OpenJDK 64-Bit Server VM (build 25.312-b07, mixed mode)

JAVA 여러개 깔려 있을 때 기본 JAVA 선택

sudo update-alternatives --config java

ubuntu@ip-172-31-13-208:~$ sudo update-alternatives --config java There are 2 choices for the alternative java (providing /usr/bin/java). Selection Path Priority Status ------------------------------------------------------------ * 0 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 auto mode 1 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 manual mode 2 /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java 1081 manual mode Press to keep the current choice[*], or type selection number: 2 update-alternatives: using /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java to provide /usr/bin/java (java) in manual mode

자바 환경변수 파일 열기

sudo nano /etc/environment

자바 환경 변수 설정 추가

JAVA_HOME="/usr/lib/jvm/java-8-openjdk-amd64"

환경 변수 설정 변경 사항 저장

source /etc/environment

환경변수 제대로 설치 되었는지 확인

ubuntu@ip-172-31-13-208:~$ echo $JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64

echo $JAVA_HOME

자바 다운로드 참고

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from http://soobindeveloper8.tistory.com/617 by ccl(A) rewrite - 2021-12-18 15:27:37