学习Elasticsearch之1：如何在Ubuntu 14.04上安装Oracle JDK

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如何选择JDK版本

Elasticsearch 2.3官方文档中推荐的JDK版本是“Oracle JDK version 1.8.0_73”，最低Java 7.

Oracle的JDK的安装方式

Oracle JDK的安装方式有两种方式

手动安装步骤

  • 从这里下载JDK 8u91
  • 拷贝下载安装包到~/Download/目录下：’scp ~/Downloads/jdk-8u91-linux-x64.tar.gz ethancai@172.16.210.149:~/Downloads/‘
  • SSH远程连接Ubuntu Server，ssh ethancai@172.16.210.149
  • 删除OpenJDK
    • sudo apt-get purge openjdk-\*
  • 拷贝安装文件到安装目录
    • sudo mkdir -p /usr/local/java
    • sudo cp -r ~/Downloads/jdk-8u91-linux-x64.tar.gz /usr/local/java/
  • 解压
    • cd /usr/local/java
    • sudo tar -xvzf jdk-8u91-linux-x64.tar.gz

  • 修改登录式Shell的全局启动配置

    • sudo vim /etc/profile，然后将如下内容拷贝到文件中
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      JAVA_HOME=/usr/local/java/jdk1.8.0_91
      JRE_HOME=$JAVA_HOME/jre
      PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
      export JAVA_HOME
      export JRE_HOME
      export PATH

  • Notify the system that JRE/JDK/Java Web Start is available for use

    • sudo update-alternatives --install "/usr/bin/java" "java" "/usr/local/java/jdk1.8.0_91/bin/java" 1
    • sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/local/java/jdk1.8.0_91/bin/javac" 1
    • sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/local/java/jdk1.8.0_91/bin/javaws" 1
  • Reload your system wide PATH
    • source /etc/profile

通过apt命令安装步骤

  • 此命令目前能安装的jdk8最新版本是jdk-8u77-linux-x64
  • sudo apt-get purge openjdk-\*
  • sudo add-apt-repository ppa:webupd8team/java
  • sudo apt-get update
  • sudo apt-get install oracle-java8-installer

验证安装是否成功

  • java -version
  • javac -version
  • 重启sudo shutdown -r 0