GL375 Linux Shell Scripting

Prerequisites:

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

Supported Distributions: Red Hat Enterprise Linux 7 SUSE Linux Enterprise 12

1. Introduction to the Shell
   1. Shell Script Strengths and Weaknesses
   2. Shells
   3. Switching User Contexts
   4. Example Shell Script
   5. Shell and Environment Variables
   6. Key Environment Variables
   7. Which and Type
   8. General Quoting Rules
   9. Nesting Commands
   10. Help from Commands and Documentation
   11. whereis
   12. Getting Help Within the Graphical Desktop
   13. Getting Help with man & info
   Lab Tasks
   1. Shell Variables
   2. Shell Meta-Characters
   3. Command Substitution
2. Shell Scripting Basics
   1. Positional Parameters
   2. Input & Output
   3. printf
   4. alias
   5. Functions
   6. Colors in Scripts
   7. Custom Bash Prompts
   Lab Tasks
   1. Aliases
   2. Bash Login Scripts
   3. Create "userinfo" and "sysinfo" functions
3. Working with Files
   1. Communication Channels
   2. File Redirection
   3. Piping Commands Together
   4. Doing Math
   5. Filesystem Structures
   6. Determining Disk Usage With df and du
   7. cron
   8. The crontab Command
   9. crontab Format
   10. /etc/cron.*/ Directories
   11. Sending Email with mailx
   Lab Tasks
   1. Disk and Filesystem Usage
   2. Redirection and Pipes
4. Regular Expressions
   1. Searching Inside Files
   2. Regular Expression Overview
   3. Regular Expressions
   4. RE Character Classes
   5. Regex Quantifiers
   6. RE Parenthesis
   7. The Streaming Editor
   Lab Tasks
   1. Pattern Matching with Regular Expressions
   2. Extended Regular Expressions
   3. Using Regular Expressions With sed
5. Branching and Looping
   1. Exit Status
   2. Comparisons with test
   3. Conditional Statements
   4. Flow Control: case
   5. Flow Control: while and until Loops
   6. The borne for-Loop
   7. Flow Control: select
   Lab Tasks
   1. Reporting User Statistics
   2. Monitoring Filesystem Usage
6. Data Munging
   1. Text Processing with Awk
   2. Text Sorting
   3. Duplicate Removal Utility
   4. Extracting Columns of Text
   Lab Tasks
   1. Create "rmhost" function
   2. Create "showenv" function
   3. Parsing Mail Server Logs
   4. Fixing Incorrect Files
7. Security, Whitespace, and Other Gotchas
   1. Gotcha: Quoting Variables
   2. Gotcha: Locales
   3. Gotchas: Maximum Command Length
   4. Gotcha: Whitespace in for Loops
   5. Reading Files with while
   6. Gotcha: $IFS
   7. Gotcha: Printing in .bashrc
   8. Gotcha: Aliases
   Lab Tasks
   1. Renaming MP3 Files
   2. Split and Display $PATH
   3. A tar-based Backup

1. Challenge
   1. Apache Configuration Files
   2. httpd.conf – VirtualHost Configuration
   Lab Tasks
   1. Automated Virtual Host Provisioning
2. Emacs
   1. Emacs
   2. The Emacs Interface
   3. Basic Emacs
   4. More Emacs Commands
   Lab Tasks
   1. Text Editing with Emacs
3. The Secure Shell (SSH)
   1. OpenSSH Client & Server Configuration
   2. Accessing Remote Shells
   3. Transferring Files
   4. SSH Key Management