Linux Shell Scripting

Module 1: INTRODUCTION TO THE SHELL

• Shell Script Strengths and Weaknesses
• Shells
• Switching User Contexts
• Example Shell Script
• Shell and Environment Variables
• Key Environment Variables
• Which and Type
• General Quoting Rules
• Nesting Commands
• Help from Commands and Documentation
• whereis
• Getting Help Within the Graphical Desktop
• Getting Help with man & info

Module 2: SHELL SCRIPTING BASICS

• Positional Parameters
• Input & Output
• printf
• alias
• Functions
• Colors in Scripts
• Custom Bash Prompts

Module 3: WORKING WITH FILES

• Communication Channels
• File Redirection
• Piping Commands Together
• Doing Math
• Filesystem Structures
• Determining Disk Usage With df and du
• cron
• The crontab Command
• crontab Format
• /etc/cron.*/ Directories
• Sending Email with mailx

Module 4: REGULAR EXPRESSIONS

• Searching Inside Files
• Regular Expression Overview
• Regular Expressions
• RE Character Classes
• Regex Quantifiers
• RE Parenthesis
• The Streaming Editor

Module 5: BRANCHING AND LOOPING

• Exit Status
• Comparisons with test
• Conditional Statements
• Flow Control: case
• Flow Control: while and until Loops
• The for Loop
• Flow Control: select

Module 6: DATA MUNGING

• Text Processing with Awk
• Text Sorting
• Duplicate Removal Utility
• Extracting Columns of Text

Module 7: SECURITY, WHITESPACE, AND OTHER GOTCHAS

• Gotcha: Quoting Variables
• Gotcha: Locales
• Gotchas: Maximum Command Length
• Gotcha: Whitespace in for Loops
• Reading Files with while
• Gotcha: $IFS
• Gotcha: Printing in .bashrc
• Gotcha: Aliases

Module A: CHALLENGE

• Apache Configuration Files
• httpd.conf VirtualHost Configuration

Module B: EMACS

• Emacs
• The Emacs Interface
• Basic Emacs
• More Emacs Commands

Module C: THE SECURE SHELL (SSH)

• ssh and sshd Configuration
• Accessing Remote Shells
• Transferring Files
• SSH Key Management

• Module 1 LAB TASKS
  • Shell Variables
  • Shell Meta-Characters
  • Command Substitution
• Module 2 LAB TASKS
  • Aliases
  • Bash Login Scripts
  • Create “userinfo” and “sysinfo” functions
• Module 3 LAB TASKS
  • Disk and Filesystem Usage
  • Redirection and Pipes
• Module 4 LAB TASKS
  • Pattern Matching with Regular Expressions
  • Extended Regular Expressions
  • Using Regular Expressions With sed
• Module 5 LAB TASKS
  • Reporting User Statistics
  • Monitoring Filesystem Usage
• Module 6 LAB TASKS
  • Create “rmhost” function
  • Create “showenv” function
  • Parsing Mail Server Logs
  • Fixing Incorrect Files
• Module 7 LAB TASKS
  • Renaming MP3 Files
  • Split and Display $PATH
  • A tar-based Backup
• Module A LAB TASKS
  • Automated Virtual Host Provisioning
• Module B LAB TASKS
  • Text Editing with Emacs

Solid understanding of Unix-based systems and proficiency on the Unix or Linux command line.