Lab 03 Text Processing and Manipulation

Part 1 grep - Finding Patterns

Tasks

• Find all lines containing the word "ERROR" in system.log
• Find all lines containing the word "warning" (case-insensitive) in system.log
• Find all lines containing "INFO" and show line numbers
• Count how many ERROR, WARNING, and INFO entries are in system.log
• Find all lines that start with "2025-04-01 1" in system.log
• Find all lines containing an IP address in system.log
• Find all email addresses in contacts.txt

Part 2 sed - Stream Editing

Tasks

• Replace all occurrences of "ERROR" with "CRITICAL" in a copy of system.log
• Remove all blank lines from sample.txt
• Print only lines 5-10 from sample.txt
• Replace "Manager" with "Team Lead" and "Developer" with "Software Engineer" in contacts.txt
• Add "PROCESSED " to the beginning of each line in a copy of contacts.txt

Part 3 awk - Text Processing

Tasks

• Print only the names and email addresses from contacts.txt
• Print sales records where the quantity is greater than 10 from sales.txt
• Print product name and total sales amount from sales.txt
• Calculate and print the total sales amount for all products
• Create a nicely formatted list of contacts with titles