stream editing

The sed (stream editor) command is a powerful tool in Bash for performing basic text transformations on an input stream (such as a file or output from a command). It allows you to automate the editing of text files, making it an essential skill for anyone working with Linux or Unix-like systems. Here's a guide to mastering the sed command for stream editing. 1. Basic Syntax of sed The basic syntax of the sed command is: sed 'operation' filename Where operation is the action you want to perform on the file or input stream. Some common operations include substitution, deletion, and insertion. One of the most common uses of sed is to substitute one string with another. This is done using the s (substitute) operation.