Editing and Saving Files with Sed and Output Redirection

Managing and transforming text files directly from the command line is a fundamental skill for developers, system administrators, and data analysts. This text-based course guides you through the core mechanics of using sed alongside shell redirection to edit and save files efficiently. You will start by understanding the foundational concepts of standard streams, input/output redirection, and how sed processes text stream-by-stream. From there, you will progress to practical techniques for writing output to new files, appending data, and performing safe in-place edits. What you will learn: Understand the basics of standard input, standard output, and standard error streams; Apply sed commands to search, replace, and filter text patterns; Save command output to new files using redirection operators; Append modifications to existing files without overwriting critical data; Perform safe in-place file editing using backup extensions to prevent data loss; Practice modern command-line workflows for text processing and automation. This course begins with essential terminology and basic concepts before moving on to practical, step-by-step examples. It is designed entirely for beginners with no prior text-processing experience, though basic familiarity with the command line is helpful. Start reading today to build confidence in your command-line file editing skills.