how to flush(like clean in eclipse) in unix

Hi friends,
I am new to unix env...After running one program , when i try to run with another values the first values are still there.it is not taking second values..

When i work in eclipse in windows i used to clean with the menu Project ----> clean --->

Can anybody tell me the corresponding comment to flush or clean the buffer using unix

Since i am working directly in prodution server I can't able to test and learn...That is it should no affect the other programs or stop the tomcat

thanks
[ May 27, 2008: Message edited by: priya pratheepp ]