LinuxCBT RegEx Edition focuses on the application of POSIX and Perl-compatible Regular Expressions.

Regular Expressions are critical to efficiently parsing textual data (log file content, data feeds, files & directories, etc.). RegEx support is included with Linux | Unix operating systems via ubiquitous tools such as: grep, awk, sed, Perl, PHP, etc., and provides systems administrator/engineers and developers alike, the ability search, time-effectively, considerable amounts of textual data, using literals, character classes, metacharacters, metasequences, etc.

Let LinuxCBT RegEx Edition cost-effectively teach you Regular Expressions!

Recommended Prerequisites for:

• Any LinuxCBT Operating System Course (Classic/EL-4/SUSE/Debian Editions)
  • Open mind & determination to master Linux and related open-source applications
  • Basic understanding of networking concepts
  • Access to a Linux system to follow the exercises

LinuxCBT Scripting Editon - RegEx - Module 5

• Introduction - Features
  • Discuss course outline
  • Explore system configuration
  • Identify key systems to be used
  • Install the Bluefish graphical editor - Supports POSIX and PERL-compatible RegExes
  • List key Regular Expressions applications
  • Enumerate and discuss key Regular Expressions features
• Metacharacters
  • Enumerate important metacharacters
  • Provide examples of asterisk '*' usage
  • Apply simple character classes to searches
  • Perform searches in the Bluefish editor using literals and metacharacters
  • Explain and apply anchors: '^', '$'
• Character Classes
  • Discuss features and applications
  • Perform searches in the Bluefish editor using character classes
  • Search for case-insensitive characters
  • Negate character class values using the circumflex character: '^'
  • Specify ranges and inclusions
  • Search for string boundaries
  • Alternate between POSIX and Perl-compatible Regular Expressions in Bluefish Editor
• RegExes with GREP & EGREP
  • Discuss features and applications
  • Perform simple GREP searches
  • Use EGREP to find strings based on RegExes
  • Parse installed applications using EGREP
  • Extract 'su' attempts from the system log file: /var/log/messages
  • Parse log file entries based on specific dates
• Parenthetical Expressions
  • Discuss features and applications
  • Compare and contrast with character classes
  • Search for strings using the Bluefish Editor
  • Combine anchors with parenthesis and evaluate results
  • Search for multiple groups of strings using alternation
  • Use parenthetical expressions with EGREP
  • Nest expressions using parenthesis
• Quantifiers
  • Discuss features and benefits
  • Define RegEx tokens
  • Enumerate and discuss RegEx quantifiers
  • Test '?' using the Bluefish Editor and EGREP
  • Test '*' using the Bluefish Editor and EGREP
  • Test '+' using the Bluefish Editor and EGREP
  • Test '*' using the Bluefish Editor and EGREP
  • Test '{ }' - arbitrary quantifiers with the Bluefish Editor and EGREP
  • Combine anchors, parenthesis and various quantifiers
• Shortcut Sequences - POSIX & Perl
  • Discuss features and benefits
  • Enumerate and discuss key shortcut sequences
  • Test shortcut sequences using the Bluefish Editor
• Awk - Field Parser
  • Discuss features and applications
  • Use awk to extract fields from the process listing
  • Apply RegEx literal strings to awk search and evaluate results
  • Apply RegEx character classes to awk search and evaluate results
  • Apply RegEx parenthetical expressions to awk search and evaluate results
  • Apply RegEx quantifiers to awk search and evaluate results
  • Incorporate conditional RegEx matching with awk search and evaluate results
  • Extract fields, based on RegExes, from system log file: /var/log/messages
• SED - Stream Editor
  • Discuss features and applications
  • Perform text transformation of text file using string literals
  • Perform text transformation of text file using string literals and character classes
  • Perform text transformation of text file using string literals and anchors
  • Perform text transformation of text file using string literals and character classes
  • Evaluate results
• GNU Utilities (GREP|Awk|SED) for Windows
• Discuss features and benefits
• Identify and connect to Windows Server target system
• Download and install GNU utilities for Windows: GREP, Awk, SED
• Perform EGREP searches and evaluate results
• Perform gawk searches and evaluate results
• Perform SED substitutions and evaluate results
• Perl Regular Expressions
  • Discuss features and applications
  • Write simple Perl script to compare command line argument to RegEx and evaluate results
  • Alter Perl script to read text file and perform RegEx comparisons and evaluate results
  • Incorporate character classes, parenthetical expressions, case-insensitivity and quantifiers
  • Evaluate results
  • Substitute matched text using Perl RegExes
  • Substitute matched text using Perl RegExes from the command line
  • Update system log using text substitution from the command line
• PHP Regular Expressions
  • Discuss features and applications
  • Perform POSIX and Perl-compatible RegExes from the command line
  • Substitute text using RegExes
  • Evaluate results
  • Design HTML form to collect fields via the browser
  • Design back-end, action script to process the POST fields using RegExes
  • Halt processing if POST fields do NOT meed criteria based on RegExes
  • Evaluate results
• Apache Regular Expressions
  • Discuss features and benefits
  • Identify key configuration files
  • Explore key RegEx-supporting Apache directives
  • Match a range of directories using RegExes with <DirectoryMatch> directive
  • Restrict access to files using RegExes with <FilesMatch> directive
  • Match URL directory values using RegExes with <AliasMatch> directive
  • Redirect users to alternate content using RegExes with <RedirectMatch> directive
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