Originally posted by big
rf works on folders if there is not a file in the folder (otherwise you wil get an error), you will have to open the folder (often there are hidden folders within each other, that you must "cd" into, finally in the last folder you will have to do a "ls" then "rm" all files. then "cd /(up one notch)" and "rf" what ever folder is there...then "cd /(up one notch)" and "rf" that folder... that was the process I had to go through
to change permission (chmod) from terminal, "cd /Volumes/(directory to your folder you want to change or delete, I suggest going there instead of just doing it)" then "ls" to view all the files& folders in that directory, then "chmod 777 NameOfFile"
pretty easy...and even easier once you do it 12 or 13 times...I'd suggest picking up a Unix book for some basic command lines and theories