Linux中安装jdk8及下载
linux-dash
A beautiful web dashboard for Linux
项目地址:https://gitcode.com/gh_mirrors/li/linux-dash
免费下载资源
·
目录
一、下载JDK
以 jdk8 为例
文件名 : jdk-8u191-linux-x64.tar.gz
下载地址:https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
二、安装
1、上传安装包
用WinSCP 将 jdk-8u191-linux-x64.tar.gz上传到Linux系统中
我的jdk存放位置: /home/centos02/bigdataTool/JDK8
2、解压安装包
tar zxvf jdk-8u191-linux-x64.tar.gz
3、使用Vi编辑器,设置环境变量
#Java evn
export JAVA_HOME=/home/centos02/bigdataTool/JDK8/jdk1.8.0_191
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin
注意:
将JAVA_HOME的路径换成自己jdk的安装路径
4、退出vi编辑器,使环境变量设置立即生效
sudo -s
source /etc/profile
5、查看jdk版本
java -version
三、可能出现的错误
Java -version后显示是
centos02@centos02 $ java -version
java version “1.7.0_141”
OpenJDK Runtime Environment (rhel-2.6.10.1.el6_9-x86_64 u141-b02)
OpenJDK 64-Bit Server VM (build 24.141-b02, mixed mode)
解决方法:
删除 /usr/bin/java
重新生效
[centos02@centos02 ~]$ which java
/usr/bin/java
[centos02@centos02 ~] $ sudo rm /usr/bin/java
[centos02@centos02 ~]$ sudo -s
[sudo] password for centos02: 输入密码
[root@centos02 centos02]# source /etc/profile
[root@centos02 centos02]# java -version
java version "1.8.0_191"
Java(TM) SE Runtime Environment (build 1.8.0_191-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.191-b12, mixed mode)
[root@centos02 centos02]# exit
exit
[centos02@centos02 ~]$ java -version
java version "1.8.0_191"
Java(TM) SE Runtime Environment (build 1.8.0_191-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.191-b12, mixed mode)
[centos02@centos02 ~]$
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