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Course Overview This course presents proven techniques for effectively using key standard UNIX tools and utilities. Through extensive in-class hands-on exercises, you gain the knowledge and skills to adapt the UNIX environment to your particular needs. Audience This course is valuable for systems and database administrators, software engineers, programmers and those who want to maximise the power of their UNIX/Linux system. Knowledge of UNIX or Linux at the level of Course 428, " UNIX Introduction ", or Course 143, " Linux Introduction ", is assumed. Skills Gained - Become an expert builder and user of UNIX/Linux tools and utilities
- 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 Outline 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 KornShell command history
Finding UNIX documentation - The mancommand
- Other manual page browsers
Searching Text with Regular Expressions UNIX regular expressions - The meta character set
- Building search patterns
- Developing extended regular expressions
Using the grepcommand - 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
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, uniqand tee
- Combining filters for complex text processing
- Executing filter commands with find
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 ifand case
- Quoting shell commands to avoid problems with variables
- Reading and testing standard input
- Looping with forand 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 creatively with tools - 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 awkone-liners
Creating long awkscripts - Matching patterns with extended regular expressions
- Modifying awk's default behaviour with special patterns and built-in variables
- Calling awkbuilt-in functions
Advanced awkcapabilities - 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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