JDK 버전 1, 시스템을 확인
[root@localhost software]# java -version
디스플레이 :
openjdk version "1.8.0_102"
OpenJDK Runtime Environment (build 1.8.0_102-b14)
OpenJDK 64-Bit Server VM (build 25.102-b14, mixed mode)
(2) 설치 패키지 JDK 검출
[root@localhost software]# rpm -qa | grep java
디스플레이 :
java-1.7.0-openjdk-1.7.0.111-2.6.7.8.el7.x86_64
python-javapackages-3.4.1-11.el7.noarch
tzdata-java-2016g-2.el7.noarch
javapackages-tools-3.4.1-11.el7.noarch
java-1.8.0-openjdk-1.8.0.102-4.b14.el7.x86_64
java-1.8.0-openjdk-headless-1.8.0.102-4.b14.el7.x86_64
java-1.7.0-openjdk-headless-1.7.0.111-2.6.7.8.el7.x86_64
(3) 제거 오픈 JDK
[root@localhost software]# rpm -e --nodeps tzdata-java-2016g-2.el7.noarch
[root@localhost software]# rpm -e --nodeps java-1.7.0-openjdk-1.7.0.111-2.6.7.8.el7.x86_64
[root@localhost software]# rpm -e --nodeps java-1.7.0-openjdk-headless-1.7.0.111-2.6.7.8.el7.x86_64
[root@localhost software]# rpm -e --nodeps java-1.8.0-openjdk-1.8.0.102-4.b14.el7.x86_64
[root@localhost software]# rpm -e --nodeps java-1.8.0-openjdk-headless-1.8.0.102-4.b14.el7.x86_64
또는 사용
[root@localhost jvm]# yum remove *openjdk*
이후의 rpm -qa를 다시 입력 | 그렙 자바보기 언로드의 경우 :
[root@localhost software]# rpm -qa | grep java
python-javapackages-3.4.1-11.el7.noarch
javapackages-tools-3.4.1-11.el7.noarch
4, 새로운 JDK를 설치
[root@localhost software]# ll
total 181192
-rw-r--r-- 1 root root 185540433 May 20 2017 jdk-8u131-linux-x64.tar.gz
JDK-8u131 - 리눅스 - x64.tar.gz 설치 패키지를 추출
[root@localhost software]# mkdir -p /opt/soft
[root@localhost software]# mv jdk-8u131-linux-x64.tar.gz /opt/soft
[root@localhost software]# tar -zxvf jdk-8u131-linux-x64.tar.gz
[root@localhost software]# ln -s jdk1.8.0_131 jdk
(5) 환경 변수를 설정할
[root@localhost software]# vim /etc/profile
상단에 추가 :
export JAVA_HOME=/opt/soft/jdk
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib export PATH=${JAVA_HOME}/bin:$PATH
6 실행 프로파일 파일
[root@localhost software]# source /etc/profile
7, 새로 설치된 JDK를 확인
[root@localhost software]# java -version
디스플레이 :
java version "1.8.0_131"
Java(TM) SE Runtime Environment (build 1.8.0_131-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)