About the Course#

Unix/Linux Shell Scripting is intended to cover beginner to intermediate-level shell script development, and is aimed at Unix/Linux system administrators, database, network and security system administrators, and software developers who work in a Unix/Linux environment.

This course teaches the development of scripts using the Bash shell-script interpreter.

Course Goals#

Unix/Linux Shell Scripting is designed to:

• Introduce Unix/Linux users to automating common repetitive system administration and configuration tasks
• Provide a comprehensive grasp of shell-script syntax and semantics
• Ensure a firm grasp of script development and debugging methodology

Who Should Attend#

Unix/Linux users who are responsible for system administration, and who already have exposure to common Unix/Linux concepts and have experience with common Unix/Linux commands and file-system manipulation.

Course Outline#

What is covered by the course#

• Shell scripting concepts
  • Overview of different interpreters commonly available (and Why Bash)
  • Executing commands: built-in commands and the command PATH
  • Elements of Bash scripts
• Writing and debugging scripts
  • Creating and executing scripts
  • Debugging scripts
• Bash Script Execution
  • Bash initialisation files
  • Variables
  • Built-in variables
  • Shell expansion
  • Aliases
  • Special characters
• Pipelines and sub-shells
• Common scripting tools
  • Regular Expressions
  • grep
  • sed - Stream Editor
  • awk Pattern matching and replacement
• Bash programming
  • Conditional logic - if and case statements
  • Repetition - for, while and until loops
  • Exit status
  • Tests
  • The shift} built-in command
  • I/O redirection
• Interactive scripts
  • Displaying messages
  • Getting user input
• Functions
• Security Issues
  • Signals and Traps
  • Permissions and Ownership
  • PATH revisited

Topics NOT Covered by this Course#

• Common Unix/Linux commands and concepts.
• Use of vi (or any other text editor)