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Chapter 8. tcsh: An Extended C Shell

This chapter describes tcsh, an enhanced version of the C shell. On many versions of Linux, tcsh is also used as the C shell; in that case, the tcsh features described in this chapter work even when you run csh. The C shell was so named because many of its programming constructs and symbols resemble those of the C programming language.

The default shell on Linux systems is bash. If you want to use tcsh, you first need to change your default. Each user's shell preference is kept in the password table. If you are creating an account, you can set the default shell when you add the user. If the account already exists, use the chsh command to change the shell (see the command descriptions in Chapter 3).

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