What does the command 'touch' do?

The command 'touch' is primarily used in Unix-like operating systems to create a new file if it does not already exist. If the specified file does exist, the command updates the file's timestamp to the current date and time. This dual functionality—creating a file and modifying its timestamp—makes 'touch' a versatile tool in file management.

Creating a file with 'touch' does not require any content to be added; it simply generates an empty file. This is useful for scripting and automation, where you might need to ensure a file exists prior to performing other operations. Additionally, updating timestamps is important for various reasons, such as maintaining a record of file modifications or ensuring proper file management practices.

The other commands listed do not align with the primary function of 'touch.' Deleting a file, moving a file, or displaying file contents are handled by different commands in the command-line interface.