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Shell Flavours

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Many different Unix shells are available such as:
• The Bourne shell (sh).
• The Korn Shell (ksh).
• The C shell (csh).
• The tcsh shell (tcsh).
• The bash shell (bash).

The BOURNE SHELL

• The Bourne shell, also known as the standard shell was written by Steven Bourne of Bell Labs and is the most compact shell and also the simplest. The bourne shell can be found on every Unix system.

The KORN SHELL

• The Korn shell is an advanced version of the bourne shell so it contains all the features of the bourne shell with additional enhancements. This shell was written by David Korn. The Korn shell adds job control, history, command line editing, aliases and subroutines to the Bourne shell. Itis compatible with Bourne shell scripts and is commonly available on SVR4 UNIX machines.

The C SHELL

• The "C-shell" was written by a group of people at Berkeley. Many of the programming language constructs resemble the C language, hence the name C-shell. The C-shell is commonly used for interactive use.

The tcsh SHELL

• The tcsh shell is public domain software. Tcsh is basically the C-shell with command completion and command line editing.

The bash SHELL

• The bash shell (Bourne Again Shell) is offered free by the GNU foundation. The bash shell is bourne shell compatible and offers command line editing, command aliases and history.

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