The ownership of the file doku.odt should be changed. The new owner is named tux. Which command accomplishes this change?

chmod modifies file permission bits (read, write, execute), not ownership - 'u=tux' is not valid chmod syntax.

'newuser' is not a standard Linux command; useradd/adduser create new user accounts and have no function for changing file ownership.

The chown (change owner) command is the standard Linux utility for changing file and directory ownership. The syntax 'chown tux doku.odt' assigns the user 'tux' as the new owner of the file 'doku.odt', directly fulfilling the requirement.

'transfer' is not a valid Linux command; no such utility exists for reassigning file ownership.

passwd is used to change user account passwords and has no capability to modify file ownership.