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.