An archive file is a collection of files and directories stored in one file. The archive file is not compressed — it uses the same amount of disk space as all the individual files and directories combined.

When AT & T software engineers Dennis Ritchie and Ken Thompson were designing UNIX, they wanted to create a way for people to interact with their new system.

To change directories from your current working directory in linux, use the command cd.

The linux operating system has a method of storing data in files and directories so that it can keep track of additions, modifications, and other changes. In Linux, every file is stored in a directory. Directories can also contain subdirectories and it may also contain files and other subdirectories.

To find out the Linux help in operating system,first you need to know about manual pages.

Locating Files and Directories

Linux, like UNIX, is a multi-user system and file permissions are one way the protects the system. One way to gain entry when you are denied permission is to enter the command su -. This is because whoever knows the root password has complete access.

Command Line

Wildcards are place holders used to allow users to search for or use multiple files with similar names. The subject of wildcards is part of the larger subject of regular expressions in linux.

In linux directories are treated like files. They can be created, deleted, moved and copied from a shell prompt, using commands similar to those for files.

Linux file names may include different type of file extensions, may have multiple extensions, or may not have any at all.

From the shell's point of view, there are three kinds of information in linux:

Linux allows you to enter multiple commands at one time. The only requirement is that you separate the commands with a semicolon.

inux is a freely distributable Operating System with the version of Unix. The source code of Linux is available freely over the internet and the source code was freely distributable.

An application that allows you to type commands instead of using a graphical interface for all computing activities.Shell Prompt is useful for faster and efficient to perform tasks in linux.

Enter the command alone at a shell prompt and press [Enter]. For example, entering cp alone returns a brief description of the command and its usage.

By default, you can only read the first ten lines of a file. You can change the number of lines displayed by specifying a number option.

A very small tutorial on basic linux commands

It is unnecessary to type the same command over and over. The linux bash shell remembers your past commands.These commands are stored in the .

Open a shell prompt. If you are not logged in as root, type the command su - and enter the root password.