Lesson 1: Overview of UNIX/Linux

• Define what is meant by an operating system
• List the primary functions of an operating system
• Describe the basic components of a Unix system
• Identify three types of user interfaces offered by Red Hat Linux
• Be able to log on and off of a Unix system in a secure manner
• Perform simple tasks by entering commands

1. What is a Computer?
   1. Components:
      1. Hardware
      2. Software
   2. Functionality:
   3. Examples:
   
   
2. What is an Operating System?
   1. Components:
   2. Functionality:
   3. Examples:
   
   
3. The UNIX Operating System
   1. Components:
      1. Shell
      2. System Commands
      3. Kernel
   2. Functionality:
   3. Examples:
   
   
4. The Kernel
   1. Components:
      1. System Call Interface
      2. File System Management
      3. Process Control
      4. Memory Management
      5. Device Drivers
   2. Functionality:
   
   
5. The Shell
   1. Command Line
   2. Menu-Driven
   3. Graphical
   
   
   
6. Logging in
   1. Login name (uid)
   2. Password
   3. [Terminal Type]
   
   
7. Logging out
    
   
8. Good Passwords

1. Why would someone want to use UNIX as their OS?
2. What is software and what two categories is it divided into?
3. What is a login session and how does a network session differ from a local session?
4. What are the common mistakes made when attempting to logon to a UNIX system?