linux配置/etc/profile后./etc/profile 后执行java -version后报错：
linux Unrecognized option: -verison Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit.
原写法是：JAVA_HOME=/usr/local/jdk/jdk1.7.0_55
应该是：export JAVA_HOME=/usr/local/jdk/jdk1.7.0_55
