Fedora 安装JDK

jdk-6u45-linux-x64-rpm.bin 安装包，用root用户执行安装。安装之后的jdk在/usr/java目录下，但是如果之前已经安装了openjdk的话，还需要设置一些环境才能使用。

使用ls /usr/bin/ja* -l 命令查询结果如下：

lrwxrwxrwx. 1 root root 21 Feb 25 22:23 /usr/bin/jar -> /etc/alternatives/jar
lrwxrwxrwx. 1 root root 27 Feb 25 22:19 /usr/bin/jarsigner -> /etc/alternatives/jarsigner
lrwxrwxrwx. 1 root root 22 Feb 25 22:13 /usr/bin/java -> /etc/alternatives/java
lrwxrwxrwx. 1 root root 23 Feb 25 22:15 /usr/bin/javac -> /etc/alternatives/javac
lrwxrwxrwx. 1 root root 25 Feb 25 22:20 /usr/bin/javadoc -> /etc/alternatives/javadoc
lrwxrwxrwx. 1 root root 23 Feb 25 22:21 /usr/bin/javah -> /etc/alternatives/javah
lrwxrwxrwx. 1 root root 23 Feb 25 22:21 /usr/bin/javap -> /etc/alternatives/javap
lrwxrwxrwx. 1 root root 24 Feb 25 22:14 /usr/bin/javaws -> /etc/alternatives/javaws

那么这些link都需要更新，如下：

alternatives --install /usr/bin/jar jar /usr/java/latest/bin/jar 200000

alternatives --install /usr/bin/jarsigner jarsigner /usr/java/latest/bin/jarsigner 200000

alternatives --install /usr/bin/java java /usr/java/latest/jre/bin/java 200000

alternatives --install /usr/bin/javac javac /usr/java/latest/bin/javac 200000

alternatives --install /usr/bin/javadoc javadoc /usr/java/latest/bin/javadoc 200000

alternatives --install /usr/bin/javah javah /usr/java/latest/bin/javah 200000

alternatives --install /usr/bin/javap javap /usr/java/latest/bin/javap 200000

alternatives --install /usr/bin/javaws javaws /usr/java/latest/jre/bin/javaws 200000

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Fedora 安装JDK

原文：http://blog.csdn.net/ilyz5609/article/details/19937181