Is there any way of passing bash script commands using xCode.

For example lets say i have a UIButton and when i tap that button, a bash shell Script runs.

Is it possible??

i have found that this command is used for bash scripting in xcode.
Its working fine in simulator but when i try this in real iPhone, its not working.

Code:

system("echo Hello World !!!");

Any suggestions on how to make this work in real iPhone??