Red Hat Enterprise Linux 5 系统中安装JDK1.6
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1、 软件
a) 下载jdk-6u13-linux-i586.bin 地址: http://download.developers.sun.com.cn/jdk/6u13/jdk-6u13-linux-i586.bin
2、 安装
a) 解压
# sh jdk-6u13-linux-i586.bin
b) 复制
# cp –r jdk1.6.0_13 /usr/java
c) 查看是否解压成功
# cd java
# ./bin/java -version
java version"1.6.0_13"
Java(TM) SERuntime Environment (build 1.6.0_13-b03)
Java HotSpot(TM)Client VM (build 11.3-b02, mixed mode)
# java -version
java version"1.4.2"
gij (GNU libgcj) version4.1.2 20070626 (Red Hat 4.1.2-14)
Copyright (C) 2006Free Software Foundation, Inc.
说明系统自带的java版本是1.4,新的java版本是1.6,所以需要改变环境变量,替换系统自带的java
d) 设置环境变量
# vi /etc/profile
出现编辑框,在"HISTSIZE=1000"底下添加环境变量的路径:
JAVA_HOME=/usr/java
PATH=$PATH:/$JAVA_HOME/bin
CLASSPATH=.:$JAVA_HOME/lib
JRE_HOME=$JAVA_HOME/jre
在"export PATH USER LOGNAME MAILHOSTNAME HISTSIZE INPUTRC"下面添加:
export JAVA_HOME PATHCLASSPATH JRE_HOME
按Esc 退出编辑框,再按“Shift+;”,输入wq (写入 保存并退出)
e) 设置java和javac的符号连接
这是把默认的jdk(本系统默认是JDK1.4)改成刚新装的jdk1.6
#cd /usr/bin
#ln -s -f /usr/java/jre/bin/java
#ln -s -f /usr/java/bin/javac
f) 重启系统(或者退出重新登陆) ,使环境变量生效
# reboot
g) 检查环境变量
# echo $JAVA_HOME
/usr/java
# echo $PATH
/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin://usr/java/bin:/root/bin
# echo $CLASSPATH
.:/usr/java/lib
h) 查看是否安装和配置成功
# java -version
java version"1.6.0_13"
Java(TM) SERuntime Environment (build 1.6.0_13-b03)
Java HotSpot(TM)Client VM (build 11.3-b02, mixed mode)
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