Which command is used to copy files or directories in Linux?

The command used to copy files or directories in Linux is "cp." This command is a fundamental utility in the Unix/Linux command-line environment that allows users to create duplicates of files or entire directories. When used with appropriate options, "cp" can also preserve file attributes, copy recursively (for directories), and provide feedback during the operation.

In practice, if you wanted to copy a file named "example.txt" to a new file named "example_copy.txt," you would use the command cp example.txt example_copy.txt. If copying an entire directory, you would typically use the -r (recursive) option, like so: cp -r /path/to/source_directory /path/to/destination_directory.

While the other choices may seem related, they are either not commands available in Linux or do not serve the function of copying files or directories. "copy" is not recognized as a command in Linux, "mv" is used for moving or renaming files and directories rather than copying, and "duplicate" is not a valid command in the Linux command-line context. Understanding the function of each command and their correct usage is essential for effective file management in a Linux environment.