Goals for this Hour

In this hour, you learn

• What shells are available, and how they differ from one another

• How to identify which shell you're running

• How to choose a new shell

• More about the environment of your shell

• How to explore csh configuration files

Various shells are available in UNIX, but two are quite common: the Bourne shell (sh) and the C shell (csh). You learn about two of the other shells available, the Korn shell (ksh) and the terminal-based C shell (tcsh). Because the C shell is so popular, most of this book focuses on it.