Shell Concepts

Basic script is equivalent of “Batch File” in DOS – list of commands to be executed in order, but many better features
Ideal for cross-platform, quick jobs, not overly complex programs
Shell scripts commonly used in boot scripts and OS-related automation tasks
Not ideal for complex data strutures or variable types, random file I/O, or many other things found in full programming languages. Perl is a good alternative.
Shell scripts rely heavily on external utilities and tools present in the OS. Compatibility can be a big issue.

Basic script is equivalent of “Batch File” in DOS – list of commands to be executed in order, but many better features