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 products, Perl, Python & PHP, 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:

• LinuxCBT Classic or Debian GNU/Linux Editions - Operating System (OS) Base
• Open mind & determination to master Linux Scripting Solutions - BASH
• Access to a GNU/Linux-based PC to perform exercises in LinuxCBT BASH Edition

Bourne Again Shell (BASH) Scripting

• 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
    • Test return 0
    • Test return 126 - permissions
    • Test return 127 - command not found
  • Conditional execution of subsequent commands (&&,||)
• Redirection
  • Standard Input
    • Direct input from Standard Input
    • Redirect input from a file
  • Standard Output
    • Direct output to Standard Output
    • Redirect output to a file
    • Append Standard Output to an existing file
  • Standard Error
    • Redirect Standard Error
  • Input/Output (I/O) Redirection
    • Pipes
    • Sequential execution via pipes
  • Quoting & Escaping
    • single quotes preserves whitespace, double quotes don't
    • Full-quoting - single quotes - all enclosed values are literal
    • Partial quoting - double quotes - all enclosed values are literal except "$, \, `"
    • \ is the escape character used to treat following strings literally
• 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
    • For
    • While
    • Until
  • Menu creation using Select
  • Job control - Foreground/Background processing
  • Conditionals - If-Then-Else - Testing
  • 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
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