第 02 章 基礎設施即服務（3.4）

Linux 安裝 Java

Linux 安裝 Java

此處以 JDK 1.8.0_152 爲例

下載地址

http://www.oracle.com/technetwork/java/javase/downloads/index.html

解壓縮並移動到指定目錄

解壓縮
tar -zxvf jdk-8u152-linux-x64.tar.gz

創建目錄
mkdir -p /usr/local/java

移動安裝包
mv jdk1.8.0_152/ /usr/local/java/

設置所有者
chown -R root:root /usr/local/java/

配置環境變量

配置系統環境變量
nano /etc/environment

添加如下語句
PATH=”/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games”
export JAVA_HOME=/usr/local/java/jdk1.8.0_152
export JRE_HOME=/usr/local/java/jdk1.8.0_152/jre
export CLASSPATH=CLASSPATH:$CLASSPATH:$ JAVA_HOME/lib:$JAVA_HOME/jre/lib

配置用戶環境變量
nano /etc/profile

添加如下語句
if [ “PS1”];thenif[“$PS1”];thenif[“$ BASH" ] && [ "$BASH” != “/bin/sh” ]; then
# The file bash.bashrc already sets the default PS1.
# PS1=’\h:\w\$ ’
if [ -f /etc/bash.bashrc ]; then
. /etc/bash.bashrc
fi
else
if [ “id -u” -eq 0 ]; then
PS1=’# ’
else
PS1=’$ ’
fi
fi
fi

export JAVA_HOME=/usr/local/java/jdk1.8.0_152
export JRE_HOME=/usr/local/java/jdk1.8.0_152/jre
export CLASSPATH=CLASSPATH:$CLASSPATH:$ JAVA_HOME/lib:JAVAHOME/jre/libexportPATH=$JAV{A}_{H}OME/jre/libexportPATH=$ JAVA_HOME/bin:JAVAHOME/jre/bin:$JAV{A}_{H}OME/jre/bin:$ PATH:$HOME/bin

if [ -d /etc/profile.d ]; then
for i in /etc/profile.d/*.sh; do
if [ -r i];then.$i];then.$ i
fi
done
unset i
fi

使用戶環境變量生效
source /etc/profile

測試是否安裝成功
root@UbuntuBase:/usr/local/java# java -version
java version “1.8.0_152”
Java(TM) SE Runtime Environment (build 1.8.0_152-b16)
Java HotSpot(TM) 64-Bit Server VM (build 25.152-b16, mixed mode)

爲其他用戶更新用戶環境變量
su lusifer
source /etc/profile