You Will Learn How To
- Become an expert builder and user of UNIX/Linux tools and utilities
- Perform complex search strings using regular expressions
- Employ standard, programmable text filters to manipulate text and data
- Build shell scripts to automate routine tasks
- Achieve significant productivity gains by matching the mix of tools to the task at hand
- Process structured data with awk
Course Benefits
UNIX and Linux provide a rich set of utilities to enable developers to streamline tasks and maximise productivity. To realise the full power of your UNIX/Linux system, you need to choose the right tools and use them in the right combination. Through extensive in-class hands-on exercises, you gain the knowledge and skills to adapt the UNIX environment to your particular needs.
Who Should Attend
Those who want to maximise the power of their UNIX/Linux system. Knowledge of UNIX or Linux at the level of Course 428, "
UNIX Comprehensive Introduction", or Course 143, "
Linux Comprehensive Introduction", is assumed.
Hands-On Training
Extensive exercises applying UNIX tools, utilities and scripting applications using Red Hat
® Enterprise Linux
® are performed, including:
- Forming powerful regular expressions for searching text
- Combining filters for sophisticated text processing
- Performing complex text selection and manipulation with awk
- Automating simple, repetitive tasks using shell scripts
- Writing shell scripts to customise the behaviour of standard UNIX tools
Course Content
Basic UNIX and Linux Concepts
The evolution of UNIX
- How UNIX developed
- The current state of UNIX/Linux standards
Review of UNIX commands
- File and directory manipulation
- I/O redirection and pipes
- Writing shell start-up files
- Using the shell command history
Finding UNIX documentation
- The man command
- Other manual page browsers
Searching Text with Regular Expressions
UNIX regular expressions
- Specifying string patterns for filtering operations
- The meta character set
- Building search patterns
- Developing extended regular expressions
Using the grep command
- Processing files
- Processing command output
UNIX Text Filters
The characteristics of a UNIX filter
- Reading from standard input
- Writing to standard output and standard error
- Combining filters into pipelines to perform complex tasks
- Redirecting output of a pipeline
Common UNIX filters
- Editing the output of commands with the stream editor sed
- Translating characters with tr
- Sorting files and command output
- Comparing different versions of files with diff
- Using other common filters: cut and uniq
- Combining filters for complex text processing
- Executing filter commands with find
- Finding, comparing and searching files
Shell Programming
Shell basics
- Writing simple shell scripts
- Storing data in shell variables
- Exporting variables to the environment
- Preventing the creation of a subshell environment
Controlling logic flow
- Making decisions with if and case
- Quoting shell commands to control substitutions
- Testing file attributes, strings and numbers
- Reading and testing standard input
- Looping with for and while
- Accessing the shell's built-in variables
Other shell features
- Accepting command line arguments
- Redirecting standard output
- Substituting command output
- Performing arithmetic in shell scripts
- Scanning for command line options
Working with tools creatively
- Combining UNIX filters with pipelines and command substitution
- Developing scripts incrementally
Restructuring Data with awk
awk as a flexible search tool
- Testing and extracting fields from structured input
- Performing arithmetic calculations
- Writing useful awk one-liners
Creating long awk scripts
- Matching patterns with extended regular expressions
- Modifying awk's default behaviour with special patterns and built-in variables
- Calling awk built-in functions
Advanced awk capabilities
- Using awk's control constructs for testing and looping
- Storing data in arrays
- Formatting output using printf
- Searching files with multiline records
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