The UNIX Essentials Featuring the Linux Operating System course provides students with the necessary knowledge and skills to use components of manage files and directories, create and modify files, control the user work environment, archive files, and use remote commands. In addition, this course explains fundamental command-line features of the Linux Operating System (Linux OS), including file system navigation, the vi text editor, file permissions, access control lists (ACLs), command shells, file compression, basic network use, and reading shell scripts.

preparing to perform basic system administration duties and are new to the Linux OS, or those who are unfamiliar with the UNIX operating system.

Prerequisites
To succeed fully in this course, students should be able to:

• Use basic computer hardware (monitor, keyboard, and mouse)
• Input commands and control characters from a keyboard

Skills Gained
Upon completion of this course, students should be able to:

• Use components of the desktop system
• Use command-line features and help resources
• Manage and view files and directories and change the directory contents
• Create and modify files and use basic file permissions
• Create ACLs
• Control the user work environment
• Use commands within the shell
• Perform basic process and job control
• Archive files and create archives
• Compress, view, and uncompress files

Related Courses
After:

• Red Hat Enterprise Admin for Linux
• Shell scripts  

Course Content

CHAPTER 1 - Directory and File Commands

• What is Linux?
• The Linux kernel
• The Many Breeds of Linux
• Red Hat Enterprise Linux
• Fedora
• Ubuntu
• Mileage May Vary
• What is a shell?
• The bash shell
• Getting to the shell
• A few quick tips
• No news is good news
• Tab completion
• Repeating recent commands with the up arrow
• Getting More Help
• Man Pages
• Info

CHAPTER 2 - Important Files and Directories

• Directory Structure
• Directory Commands
• What Directory am I In?
• Creating New Directories
• Deleting Directories
• Renaming directories
• Navigating the Directory Tree
• Listing Directory Contents
• Disk Usage of a Specific Directory
• File Commands
• Creating an Empty File
• A Brief Discussion about Wildcards
• Deleting Files
• Preventing Accidental File Deletion
• Deleting Files Using File Properties
• Moving and Renaming Files
• Archiving directories and files
• A Warning about Relative and Absolute Paths in tar
• Combining Files
• Displaying file contents
• Displaying Beginning Lines of a File
• Displaying Ending Lines of a File
• Display Active Writes to a File
• Display a Hex Dump of a File
• Creating a Symbolic Link to a File
• Remote file copy
• Conclusions

• Home Directory
• Hidden “Dot” Files
• Important System Files
• Important Directories
• Conclusions
• File Security Model
• File Permissions
• Change File Ownership
• Change Group Ownership
• Change User Ownership
• Changing File Permissions
• Permissions on Directories
• Setting Default Permissions Using a File Mask
• Special modes
• ACLs – Access Control Lists
• Logging on to another Group
• Conclusions

CHAPTER 4 - Linux Search Tools

• Finding files using attributes
• Using Simple ls Command Options
• Sample directory
• Finding the File Last Touched (Modified) in a Directory
• Finding the File with the Last Attribute Change
• Finding the File Last Accessed in a Directory
• Finding the Largest Files in a Directory
• Finding the Smallest Files in a Directory
• Using the find Command
• Finding Files by Age
• Finding Files > Years Old
• Finding Any Files Modified in the Past Days
• Finding txt Files Modified in the Past Days
• Find files by size
• Finding Files Larger than k
• Doing things with what we find
• Finding txt Files < Days Old and Delete Them
• Dealing with "Permission denied" in find
• Finding a String within a Text File
• Finding the Full Directory Path for a Command
• Find the Directory Path for emacs and sort
• Finding the Location of Program Binary Source Manual Pages for emacs and sort
• Finding Strings in Binary Files
• Find All Strings in the Binary File
• Finding Occurrences of a String in a Binary File
• Finding Strings in Multiple Files
• Finding a File Containing a Particular Text String
• Find processes
• Finding Process Information by Process ID
• Find Processes Belonging to a Specific User
• Conclusions

•   Inside vi
• Editor Modes of Operation
• Starting vi
• Exiting vi
• Changing from command to insert Mode
• Saving the file
• Moving the Cursor Around the File
• Deleting Text
• Searching for Text Strings
• Cutting Copying and Pasting Text
• Undo and Other Useful Commands
• vi Reference
• Conclusions

  CHAPTER 6 - Shell Scripts

• Programming with Linux
• What is a shell?
• Command Aliases
• Why use shell scripts?
• Getting Started with a Simple Shell Script
• Shell variables
• User Defined Variables
• Evaluating Expressions
• Using Quotes in Shell Scripts
• Exit Status
• The read Statement
• Command Line Arguments
• Redirection of Standard Input & Output
• Pipes
• Conditional Statements
• The if condition
• Using the test Command or [ expression ]
• Loops
• for loop
• while loop
• The case Statement
• Linux Command Summary
• Chapter Summary

CHAPTER 7 - Scheduling Jobs with crontab

• The cron Daemon
• crontab Options
• The Format of the crontab File
• Environment variable settings
• crontab Command Lines
• Chapter Summary
• Shutting Down and Changing Runlevels
• Adding and Removing Users
• Get Process Status
• Find Processes by Pattern or User
• Display the Most Active Processes
• Kill a Process
• Kill Processes Using a Pattern
• Kill All Processes Owned By a Particular User
• Logged In User Information
• Who Am I?
• Switch to a Different User
• Conclusion

CHAPTER 8 - Linux Administrator Commands

• Linux Hardware
• CPU Related Information
• Display the Number of Processors in the Server
• Displaying the Total RAM on the Linux system
• Top Memory and CPU Users
• Paging and Swapping Devices
• Kernel Parameters

CHAPTER 9 - Monitoring Memory and Processor

• Server monitoring commands
• Interactive Statistics using the top Utility
• Displaying Multi-Processor Statistics
• Displaying I/O Statistics
• Displaying Virtual Memory Statistics
• Conclusion

CHAPTER 10 - Disk and File system Commands

• Displaying File System Information
• Creating a File System
• Installing a disk
• Partition the New Disk
• Format the New Disk
• Mount the New Disk
• Working with the File System Table
• LVM: The Logical Volume Manager
• Conclusion