linux用户覆盖全局（自定义）变量环境
$ cd $HOME$ pwd
/home/dev_ydzj_1
$ java -version
java version "1.6.0_24"
Java(TM) SE Runtime Environment (build 1.6.0_24-b07)
Java HotSpot(TM) Server VM (build 19.1-b02, mixed mode)
在公司看到上述结果，认为linux系统全局java环境是1.6，但是看到下面的执行结果我就疑惑了
$ tail -3 /etc/profile
export JAVA_HOME=/opt/jdk/jdk1.5.0_15
export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH:$HOMR/bin
找人解疑，看到下面结果，顿时有所感悟！
$ less .bash_profile
# .bash_profile
# Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
# User specific environment and startup programs
export TOMCAT_HOME=/home/dev_ydzj_1/apache-tomcat-5.5.25
export CATALINA_HOME=/home/dev_ydzj_1/apache-tomcat-5.5.25
export JAVA_HOME=/opt/jdk/jdk1.6.0_24
export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$TOMCAT_HOME/bin:$CATALINA_HOME/bin:$PATH:$HOME/bin
export PATH
记录，备忘。嘿嘿！
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