C.6 Scripting and Shell Programming

The following commands include shells and programs useful in shell scripts.

bash

Bourne Again shell (default).

csh

C shell.

echo

Repeats command-line arguments on standard output.

expr

Performs arithmetic and comparisons.

line

Reads a line of input.

lockfile

Makes sure that a file is accessed by only one script at a time.

perl

Practical Extraction and Report Language, Version 5.8.1 RC3.

php

PHP scripting language Version 4.3.2, used for web development.

printf

Formats and prints command-line arguments.

python

Python scripting language, Version 2.3.

ruby

Ruby scripting language, Version 1.6.8.

sh

Standard Unix shell.

sleep

Causes a pause during processing.

tclsh

Tool Command Language (Tcl) shell, Version 8.4.

tcsh

Tenex C shell.

test

Command that tests a condition.

xargs

Command that reads arguments from standard input and passes them to a command.

zsh

Enhanced Unix shell.