LinuxCBT BASH Edition is a great product to help aspiring Linux Systems Administrators to develop foundation GNU/Linux Scripting skills. All of the subsequent LinuxCBT Scripting Edition modules, are premised on the foundations of the basic shell environment.

LinuxCBT BASH Edition prepares you or your organization for successfully automating Linux environments using the default shell; BASH.

Recommended Prerequisites:

• Any LinuxCBT Operating System Edition
• Open mind & determination to master Linux Scripting Solutions - BASH
• Access to a GNU/Linux-based PC to perform exercises

Bourne Again Shell (BASH) Scripting - Module I

• Introduction to BASH Command Line Interface (CLI)
  • Identify BASH installation & key configuration files on RedHat & Debian GNU/Linux distros
    • .profile/.bash_profile/.bashrc/.bash_history
  • Identify & use common built-in BASH commands (pwd,cd,set,unset,export,source,etc.)
  • BASH Command-line Expansion
    • Brace Expansion
    • Tilde Expansion
    • Parameter & variable Expansion
    • Command Substitution
  • BASH Reserved words
  • BASH History identification & configuration
  • Aliases (ls,du,df,rm,cp)
  • Backticks - command expansion & execution
  • BASH Prompt configuration
  • Command chaining
  • Error level/Return code (Command Exit Status) identification
  • Conditional execution of subsequent commands (&&,||)
• Redirection | Error Handling
  • Standard Input
    • Direct input from STDIN (Standard Input)
    • Redirect input from a file
  • Standard Output
    • Direct output to STDOUT (Standard Output )
    • Redirect output to a file
    • Append Standard Output to an existing file
  • Standard Error
    • Explore STDERR attributes
    • Redirect Standard Error
  • Input/Output (I/O) Redirection
    • Pipes
    • Sequential execution via pipes
  • Quoting & Escaping
• BASH Scripting
  • Basic Script definition (hello world), permissions modification & execution
  • Internal BASH variables
  • Global Variable definition
  • Function definition
  • Local Variable definition - function scope
  • BASH Arrays
  • Loops
  • Menu creation using Select
  • Job control - Foreground/Background processing
  • Conditionals
  • Case - Concise Conditional Branching
  • Positional Parameters
• BASH Script Definition
  • Create BASH script to move multiple files to new names defined by positional parameters
  • Create script to monitor directory for file changes and report the differences via E-mail to Administrator
  • Create script to monitor directory size and report threshold encroachment to Administrator via E-mail
  • Define script to parse logs for keywords and notify the Administrator via E-mail
  • Create script to monitor network connectivity between hosts and report outages to Admin via E-mail
  • Define script to monitor process, restart if fails, and E-mail Administrator at defineable limits
  • Create script to backup sub-directories using Tar & Gzip, define threshold, and SSH file to remote host
  • Log the output of BASH scripts to a Syslog-like format
• BASH 3.x Updates
  • Explore BASH 3.x on multiple platforms: Linux|Solaris|MacOSX|FreeBSD
  • Compare and contrast to BASH 2.x
  • Execute BASH 2.x commands|scripts within BASH 3.x on multiple platforms
  • Evaluate results
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