title: How to create a custom bash command in linux
body: <p>The question is about bash shell commands in ubuntu 10.04.
  I have created a simple addition program in c and it works fine in my terminal.
  Now I want to make this program to execute into my terminal as a command.</p>
  
  <p>How can I convert a C program into a bash shell command?<br>
  How to make that command an system command like others?</p>