java jdk在Linux下安装与环境变量的配置

java jdk在Linux下安装与环境变量的配置

linux环境：CentOS-6.0-x86_64-bin-DVD1.iso

[root@localhost software]# ls

jdk-6u13-linux-i586.bin  jdk-6u13-linux-i586.zip

步骤1.创建并java安装目录

[root@localhost software]# mkdir -p /usr/local/java

[root@localhost software]# mv jdk-6u13-linux-i586.bin /usr/local/java

[root@localhost software]# cd /usr/local/java/

[root@localhost java]# ls

jdk-6u13-linux-i586.bin

步骤2.更改安装程序权限

[root@localhost java]# chmod 777 jdk-6u13-linux-i586.bin

步骤3.运行程序

[root@localhost java]# ./jdk-6u13-linux-i586.bin

...

./jdk-6u13-linux-i586.bin: ./install.sfx.5278: /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory

Failed to extract the files.  Please refer to the Troubleshooting section of

the Installation Instructions on the download page for more information.

#如上，报错，解决方法：安装64位的jdk

[root@localhost java]# chmod 777 jdk-6u4-linux-x64-rpm.bin

[root@localhost java]# ./jdk-6u4-linux-x64-rpm.bin

[root@localhost java]# ls

jdk-6u4-linux-amd64.rpm                sun-javadb-common-10.3.1-4.1.i386.rpm  sun-javadb-docs-10.3.1-4.1.i386.rpm

jdk-6u4-linux-x64-rpm.bin              sun-javadb-core-10.3.1-4.1.i386.rpm    sun-javadb-javadoc-10.3.1-4.1.i386.rpm

sun-javadb-client-10.3.1-4.1.i386.rpm  sun-javadb-demo-10.3.1-4.1.i386.rpm

[root@localhost java]# rpm -ivh jdk-6u4-linux-amd64.rpm

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

   package jdk-2000:1.6.0_04-fcs.x86_64 is already installed

步骤4.设置环境变量

[root@localhost java]# find / -name dt.jar

/usr/java/jdk1.6.0_04/lib/dt.jar

#修改权限，否则会提示类似以下的错误

#-bash: /usr/java/jdk1.6.0_04/lib/dt.jar: Permission denied

[root@localhost lib]# chmod 777 /usr/java/jdk1.6.0_04/lib/dt.jar

[root@localhost lib]# chmod 777 /usr/java/jdk1.6.0_04/lib/tools.jar

[root@localhost java]# export JAVA_HOME=/usr/java/jdk1.6.0_04

[root@localhost java]# export JRE_HOME=/usr/java/jdk1.6.0_04/jre

[root@localhost lib]# export CLASSPATH=.:$JAVA_HOME/lib/dt.jar

:$JAVA_HOME/lib/tools.jar

[root@localhost lib]# export PATH=$JAVA_HOME/bin:$JAVA_hOME/jre/bin:$PATH

[root@localhost lib]# source /etc/profile #让配置文件立即生效

注意，以上仅是临时起用作的，要永久生效，必须写入配置文件

# vi /etc/profile

……

[root@localhost lib]# source /etc/profile #让配置文件立即生效