In this Shell Programming training course you will learn to customize your working environment for supercharged productivity with KornShell (ksh) and BASH shell (bash) — powerful command-interpreting languages for Linux, UNIX, and Mac OS. You will learn to improve speed by performing multi-file handling and string manipulations without external tools, customize the user environment login scripts, and wrap external file and text handling tools within scripts.Learn Shell programming and gain the skills to write reusable, robust shell scripts, extend your user environment, and automate complex administrative tasks.
- User-level UNIX commands
- Simple file editing with basic text, or GUI-based, editor
- X Window System and basic UNIX networking
- This course uses Red Hat Enterprise Linux
- Concepts taught are applicable to all Linux distributions
Shell Programming Training Delivery Methods
- After-course instructor coaching benefit
- Learning Tree end-of-course exam included
- After-course computing sandbox included
Shell Programming Training Course Benefits
Write Bash and KornShell scripts for improved productivityIntegrate arrays, functions, pattern matching, I/O, branches, loops, and variablesImprove speed with multifile handling and string manipulationsCreate and reuse function libraries
Shell Programming Course Outline
- Benefits of KornShell and Bash vs. other shells
- Differences between bash, ksh88 and ksh93
- Integrating scripts with external command-line tools
Shell script elements
- Commands and comments
- Defining exit values
Conditional program execution
- Applying if and case statements
- Simplifying if logic with elif
Program loops and iteration
- Conditional looping with while and until
- Listing for loops
Testing files and directories
- Analyzing attributes
- Checking file size and contents
Strings and patterns using [[ ]]
- Comparing strings
- Verifying the existence of a string
- Pattern matching and special characters
Debugging
- Redirecting standard error
- set commands for debugging
Positional parameters
- Passing and accessing parameters
- Manipulating parameters as groups
Shell variables
- Defining environment and local variables
- Specifying default values and error conditions
Arrays
- Creating and indexing arrays
- Processing array contents with special variables
Manipulating strings
- Extracting substrings
- Determining string length
Mathematics
- Arithmetic for and while loops
- Writing mathematical expressions: (( )), $(( )) and let
Function basics
- Functions vs. scripts
- Parameters and variables
Creating a function library
- Finding your library with PATH
- Dot . and source commands
Manipulating files and redirecting data
- Scripting file and directory management
- Unraveling the secrets of exec: opening and closing multiple files
Interacting with running processes
- Handling errors
- Processing external events
- Handling and sending signals: trap and kill
Accessing network servers
- Connecting to a network server
- Exchanging data with a network server
Ensuring environmental control
- Checking and modifying environment variables
- Using getopts to process command-line options
Handling user actions
- Accepting command-line arguments
- Employing select to create a menu interface
- Processing keyboard input
