Explain the basic components of UNIX, including its kernel, utilities, shell, and hierarchical file system. Log in to UNIX and enter commands at the shell prompt. Create simple files in the vi text editing program and list the files in a directory. Redirect standard input and output and use pipes to send the standard output of one program to the standard input of another. Create and send mail to one or more users . Perform additional mail-related tasks. Conduct a two-way, on-screen dialog with another user using the write program

• Introduction
• The Operating System (OS)
• Components of a UNIX OS
• Creating a File
• Multi-User Communication

Unit 2: Logging in and Using Commands

• Introduction
• Logging in
• About Course Examples
• Setting the Terminal Type
• Using Programs
• Passwords
• Communicating Using a Terminal
• Logging Off

Unit 3: Introduction to Files

• Introduction
• Computer Files
• Directories
• Using vi to Create a File
• After Invoking vi
• Viewing Text Files

Unit 4: Redirecting Input/Output

• Introduction
• Default Input/Output
• Redirecting Input
• Redirecting Output
• The Pipe

Unit 5: Creating, Sending, and Receiving Mail

• Introduction
• Benefits and Capabilities
• Sending Mail
• Processing Received Mail
• Mail Commands Review

Unit 6: Additional Mail Requests

• Introduction
• Using the save Request
• Deleting Mail Items
• Invoking Other Programs
• Leaving Mail Processing

Unit 7: Using the write Program

• Introduction
• An Overview of the write Program
• Determining Who Is Logged In
• Displaying write Messages
• Directing write Messages
• Conducting a Dialog
• Hints on Responding
• Protections Against write
• Using wall to Send a Message