B.7. Working with Files and Directories

B.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.

ksh

The Korn shell.

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 5.8.6.

php

PHP scripting language Version 4.3.10, used for web development.

printf

Formats and prints command-line arguments.

python

Python scripting language, Version 2.3.5.

ruby

Ruby scripting language, Version 1.8.2.

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.