UNIX Commands

Read write access
sudo chmod 777 /foldername/foldername

to provide access to jboss server
sudo chown jboss.jboss /foldername/foldername

To check how many instance is running 
ps -ef | grep "java"


Delete all files
sudo rm -r ./*

Copy files from one folder to another
sudo cp -r /data/das/ /usr/local/jboss5/server/all-with-hornetq/


ln -s /webroot/home/httpd/test.com/index.php /home/vivek/index.php