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Linux 下安装与卸载JDK<转>

2009-10-08 17:34:55| 分类： predocIT | 标签： |举报 |字号大中小订阅

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一、安装JDK：

首先到sun官网下载安装包：

https://cds.sun.com/is-bin/INTERSHOP.enfinity/WFS/CDS-CDS_Developer-Site/en_US/-/USD/ViewFilteredProducts-SingleVariationTypeFilter

分别下载：jdk-6u16-linux-i586-rpm.bin 和 jdk-6u16-linux-i586.bin

然后将这两个安装文件放到:/usr/tmp 目录下，分别修改权限，命令如下：

# chmod u+x ./jdk-6u16-linux-i586.bin

# chmod u+x ./jdk-6u16-linux-i586-rpm.bin

解压文件（这两个文件可以自动解压）：

# ./jdk-6u16-linux-i586.bin

创建目录/usr/java:

# mkdir /usr/java

将解压出来的jdk-6u16-linux-i586目录复制到/usr/java目录下：

# cp -fr jdk-6u16-linux-i586 /usr/java

解压文件

# ./jdk-6u16-linux-i586-rpm.bin

安装软件会将JDK自动安装到 /usr/java/ jdk-6u16-linux-i586目录下

二、配置环境变量

1.修改用户环境变量

假设使用java的用户为 guest，编辑该用户的.bashrc文件进行环境变量设置。

# vi /home/ guest /.bashrc

在 .bashrc文件中加入：

export JAVA_HOME=/usr/java/jdk1.6.0_16

export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib

export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH:$HOMR/bin

2.修改所有用户的环境变量

# vi /etc/profile

在该文件中加入:

export JAVA_HOME=/usr/java/jdk1.6.0_16

export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib

export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH:$HOMR/bin

注意CLASSPATH路径中加入了$CLASSPATH，这样可以避免将之前配置的路径被覆盖。

profile文件如下：

############profile begin###########

# /etc/profile

# System wide environment and startup programs, for login setup

# Functions and aliases go in /etc/bashrc

pathmunge () {

if ! echo $PATH | /bin/egrep -q "(^|:)$1($|:)" ; then

if [ "$2" = "after" ] ; then

PATH=$PATH:$1

else

PATH=$1:$PATH

fi

}

# ksh workaround

if [ -z "$EUID" -a -x /usr/bin/id ]; then

EUID=`id -u`

UID=`id -ru`

fi

# Path manipulation

if [ "$EUID" = "0" ]; then

pathmunge /sbin

pathmunge /usr/sbin

pathmunge /usr/local/sbin

fi

# No core files by default

ulimit -S -c 0 > /dev/null 2>&1

if [ -x /usr/bin/id ]; then

USER="`id -un`"

LOGNAME=$USER

MAIL="/var/spool/mail/$USER"

fi

HOSTNAME=`/bin/hostname`

HISTSIZE=1000

if [ -z "$INPUTRC" -a ! -f "$HOME/.inputrc" ]; then

INPUTRC=/etc/inputrc

fi

export PATH USER LOGNAME MAIL HOSTNAME HISTSIZE INPUTRC

#java path

export JAVA_HOME=/usr/java/jdk1.6.0_16

export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib

export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH:$HOMR/bin

for i in /etc/profile.d/*.sh ; do

if [ -r "$i" ]; then

. $i

fi

done

unset i

unset pathmunge

############profile end###########

三、卸载jkd：

1、卸载系统自带的jdk版本：

查看自带的jdk：

#rpm -qa | grep gcj

看到如下信息：

libgcj-4.1.2-44.el5

java-1.4.2-gcj-compat-1.4.2.0-40jpp.115

使用rpm -e --nodeps 命令删除上面查找的内容：

#rpm -e –nodeps java-1.4.2-gcj-compat-1.4.2.0-40jpp.115

2、卸载rpm安装的jkd版本

查看安装的jdk：

#rpm -qa|grep jdk

看到如下信息：

java-1.6.0-openjdk-1.6.0.0-0.25.b09.el5

jdk-1.6.0_16-fcs

卸载：

#rpm -e --nodeps jdk-1.6.0_16-fcs

第一部分安装JDK的说明很详细，在其指导下顺利完成JDK的安装。

原文章地址：http://lym6520.javaeye.com/blog/477945

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