Filtering and Counting Duplicate Data with the Bash uniq Command

When working with log files, data exports, or system outputs in the terminal, managing duplicate information is a critical daily task. Knowing how to quickly isolate unique entries or count repetitions directly from the command line saves hours of manual processing. This text-based course teaches you how to confidently use the Bash uniq command to clean and analyze text streams. You will start with the fundamental concepts of text streams, standard input/output, and the essential requirement of sorting data before filtering. Through clear written explanations and structured examples, you will learn to customize your text processing to handle real-world data challenges. What you will learn: Understand the core mechanics of text streams and why sorting is required before running uniq; Filter out duplicate lines to keep only unique records in your output; Count occurrences of repeated lines to generate quick frequency reports; Display only the duplicate lines or only the unique lines depending on your analysis goals; Perform case-insensitive comparisons and skip specific fields or characters; Combine uniq with other standard command-line tools using pipes for powerful text-processing workflows. You will begin with foundational terminal concepts and basic command syntax before moving on to practical, step-by-step text manipulation scenarios. This course is designed for beginners, system administrators, and data enthusiasts who want to work more efficiently in the command line, with no prior scripting experience required. Start reading to level up your command-line data-filtering skills.