What does the 'mv' command primarily do?

The 'mv' command is primarily used to move a file or directory from one location to another, and it can also be used to rename files or directories. When using 'mv', you specify the source (the file or directory you want to move) and the destination (the new location or name you want it to have). If the destination is a different directory, the file or directory is moved to that location. If the destination is a name, the file or directory can be renamed within the same directory. This versatility makes 'mv' an essential command for file management in command-line interfaces.

The other options do not accurately describe the function of the 'mv' command. Removing a directory pertains to a different command, and copying files involves another command distinct from moving them. Creating a new file is also handled by a separate command, further differentiating these functionalities from what 'mv' accomplishes.