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The 'touch' command in Linux is primarily used to create an empty file or to update the timestamp of an existing file. When you run 'touch' followed by a filename that does not already exist, it will create that file with no content. This is particularly useful for quickly creating placeholders or for scripting where a file needs to be present.

Additionally, if you use 'touch' on a file that already exists, it will update the last accessed and modification timestamps to the current date and time without altering the file's content. This functionality is valuable for various tasks, such as tracking when files were last modified or accessed, which can have implications for backups or file auditing.

The other options describe actions that the 'touch' command does not perform: it does not edit files, delete files, or view contents. Understanding this command is essential for effective file management in Linux systems.