Which command is used to edit text files in Linux?

The command used to edit text files in Linux is indeed nano. Nano is a text editor that is simple and user-friendly, making it a popular choice for both beginners and experienced users. It allows users to open, edit, and save text files directly from the terminal interface, which is essential for tasks such as modifying configuration files or creating new scripts.

Other commands listed serve different purposes. For example, cat is primarily used to concatenate and display file contents rather than edit them. Touch is used to create new empty files or update the timestamp on existing files. Grep, on the other hand, is a powerful command used for searching text within files based on specific patterns, but it does not edit the files themselves. Therefore, nano stands out as the appropriate choice for the task of editing text files in a Linux environment.