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In the diversified toolbox of Linux command-line utilities, the uniq command stands out for its proficiency in filtering duplicate lines from a sorted stream of data. Whether you are a system administrator or software developer, mastering this command can greatly enhance your scripting tasks by simplifying the process of identifying unique lines in text files or data streams. In this article, we'll explore the basics of the uniq command, its usage scenarios, and provide instructions to install it on various Linux distributions. The uniq command in Linux is a command-line utility that reads from a sorted input and writes out unique or duplicate lines to the output.