Section 7 Conclusions Page 1 Conclusions Conclusions Shell programming is a skill that every UNIX Systems Administrator should have. A shell program is simply a text file that contains shell and UNIX commands. Different shells will use a different syntax to supply this programming support. This text concentrates on the Bourne shell syntax.
Every process returns and exit status when it finishes.
An exit status of 0 indicates success. An exit status of any other value indicates failure. The exit command can be used set the exit status of a shell or a shell program.