ubuntu и переменные окружения

deady@~/temp/env$ cat ~/.bash_profile
# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
	. ~/.bashrc
fi

# User specific environment and startup programs

PATH=$PATH:$HOME/bin
PATH=$PATH:/opt/javafx/bin

export JDK_HOME=/usr/lib/jvm/java-6-sun
export JAVA_HOME=/usr/lib/jvm/java-6-sun
...
deady@~/temp/env$ 
deady@~/temp/env$ 
deady@~/temp/env$ 
deady@~/temp/env$ echo $JAVA_HOME
/usr/lib/jvm/java-6-sun
deady@~/temp/env$ 
deady@~/temp/env$ 
deady@~/temp/env$ cat test.sh 
echo "JAVA_HOME: [$JAVA_HOME]"
deady@~/temp/env$ 
deady@~/temp/env$ 
deady@~/temp/env$ ./test.sh
JAVA_HOME: []