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Chapter 8. csh and tcsh

This chapter describes the C shell and its enhancement, tcsh. On some versions of Linux, tcsh is 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 csh or 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, "Linux Commands").

The following topics are presented in this chapter:

  • Overview of features

  • Invoking the shell

  • Syntax

  • Variables

  • Expressions

  • Command history

  • Command-line manipulation

  • Job control

  • Built-in commands



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