-C

Display the program copyright message and execute the command. 

-f

Suppress error messages and messages about mode restrictions. 

-i

Prompt for confirmation before overwriting files. 

-r

Remove all files in all directories and subdirectories. 

-V

Display the program version number and execute the command. 

-u

Display the program usage message only. 

file

Specify the file. 

dir

Specify the directory.