RedHat6.0上安装jdk1.7

为熟悉linux命令以及常用软件配置，在windows虚拟机上安装了个RedHat6，然后在上面安装jdk1.7

下载jdk的过程就不说了，以下描述的是oracle官网上的rpm格式的jdk包，安装步骤如下：

1.解压安装rpm包

[kevin@localhost software]$ rpm -ivh jdk-7u6-linux-i586.rpm

  报错： error: can't create transaction lock on /var/lib/rpm/.rpm.lock (Permission denied)

错误原因：当前非root用户

2.切换到root用户

[kevin@localhost software]$ su

  输入root用户密码

3.输入命令1，得到以下信息

[root@localhost software]# rpm -ivh jdk-7u6-linux-i586.rpm 

Preparing...                ########################################### [100%]

   1:jdk                    ########################################### [100%]

Unpacking JAR files...

        rt.jar...

Error: Could not open input file: /usr/java/jdk1.7.0_06/jre/lib/rt.pack

        jsse.jar...

Error: Could not open input file: /usr/java/jdk1.7.0_06/jre/lib/jsse.pack

        charsets.jar...

Error: Could not open input file: /usr/java/jdk1.7.0_06/jre/lib/charsets.pack

        tools.jar...

Error: Could not open input file: /usr/java/jdk1.7.0_06/lib/tools.pack

        localedata.jar...

Error: Could not open input file: /usr/java/jdk1.7.0_06/jre/lib/ext/localedata.pack

        plugin.jar...

Error: Could not open input file: /usr/java/jdk1.7.0_06/jre/lib/plugin.pack

        javaws.jar...

Error: Could not open input file: /usr/java/jdk1.7.0_06/jre/lib/javaws.pack

        deploy.jar...

Error: Could not open input file: /usr/java/jdk1.7.0_06/jre/lib/deploy.pack

这个输出中的错误消息没搞明白,但是不影响使用

[root@localhost software]# ll

4.查看java暗装在哪里

[root@localhost software]# whereis java

java: /usr/bin/java /etc/java /usr/lib/java /usr/share/java /usr/share/man/man1/java.1.gz

5.设置java幻境变量

先备份一下配置文件

[root@localhost jdk1.7.0_06]# cp /etc/profile /etc/profile_backup

[root@localhost jdk1.7.0_06]# vi /etc/profile

在该文件的最后添加以下代码：

set JAVA_HOME=/usr/java/jdk1.7.0_06

export JAVA_HOME

set PATH=$PATH:$JAVA_HOME/bin

export PATH

set CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

export CLASSPATH

修改为:

export JAVA_HOME=/usr/java/jdk1.7.0_06

export PATH=$JAVA_HOME/bin:$PATH

export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

执行source命令让新加的配置项改动生效

[root@localhost kevin]# source /etc/profile

6.保存退出，在命令行上输入java javac出现了我们熟悉的提示

[root@localhost kevin]# java -version

java version "1.7.0_06"

Java(TM) SE Runtime Environment (build 1.7.0_06-b24)

Java HotSpot(TM) Client VM (build 23.2-b09, mixed mode, sharing)

[root@localhost kevin]#