# chmod ``` chmod [OPTION]... MODE[,MODE]... FILE... chmod [OPTION]... OCTAL-MODE FILE... chmod [OPTION]... --reference=RFILE FILE... ``` Change the mode of each FILE to MODE. With --reference, change the mode of each FILE to that of RFILE. ## After Help Each MODE is of the form '[ugoa]*([-+=]([rwxXst]*|[ugo]))+|[-+=]?[0-7]+'.