Operating Systems 4/4: File System

The File System 

What it is?

In a computer, a file system (sometimes written filesystem) is the way in which files are named and where they are placed logically for storage and retrieval.

The File System in each Operating System

DOS, Windows, OS/2, Macintosh and Unix-based operating systems (OSes) all have file systems in which files are placed somewhere in a hierarchical tree structure.

File pathes

In most operating systems and file systems, a route can be expressed in relative or absolute form.

• An absolute or full path points to the same location in a file system, regardless of the current working directory. To do that, it must include the root directory. 
• By contrast, a relative path starts from some given working directory, avoiding the need to provide the full absolute path. A filename can be considered as a relative path based at the current working directory. If the working directory is not the file's parent directory, a file not found error will result if the file is addressed by its name.

Operating Systems 3/4: Installation

How to install in Lliurex (Ubuntu)

1. Download Ubuntu
2. Check if Your Computer will Boot from USB
3. Make BIOS Changes
4. Try Ubuntu Before you Install It
5. Create Bootable USB
6. Install Ubuntu
7. Create a username, password, and computer name. You will login with this user id after the installation is complete.

Operating Systems 2/4: Settings

 HOW TO INSTALL A PRINTER

1.  Read the installation guide for your printer if you have it.
2.  Plug the printer into your computer. 
3.  Turn the printer on.
4.  Wait for your operating system to detect and install the printer.
5.  Install the software that came with the printer.
6.  Download the drivers from the manufacturer's website.
7.  Run the downloaded drivers.

 HOW TO CREATE USERS

 To create a user account graphically using the User Manager:

1. Select Applications (the main menu on the panel) => System Settings => Users & Groups from the panel.
   You can also start the User Manager by typing redhat-config-users at a shell prompt.
2. If you are not logged in as root, you will be prompted for your root password.
3. Click Add User.
4. Click OK. The new user will appear in the user list, signaling that the user account creation is complete. 
    

Operating Systems 1/4

The operating system is a set of programs that accompany the computer and that allows to manage both hardware and software as well as communications between the user and the team. To do these tasks, the operating system must perform fundamentally the following functions: 

-MANAGEMENT OF HARDWARE RESOURCES. Directs and coordinates the operation of all computer resources. 

-PRESENTS THE USER INTERFACE. It provides a form of communication between the user and the machine. 

-MANAGE THE ARCHIVES. It is responsible for storing the data in the storage units and performs the tasks related to its manipulation.

-ADMINISTER THE TASKS OR PROCESSES. Operating systems are multitasking so you must regulate the allocation of different resources between the tasks in execution.

-MANAGE THE PROGRAMS. It allows its installation, update and install programs. It also loads, initiates, supervises, controls and ends the execution of programs.
 
-CONTROL COMMUNICATIONS BY NETWORK. It allows connection and communication between the different devices connected in the network.