Question

I want to delete a folder which contails a zip file on Linux . Itried usting the command command 'rm' with -fr option , but it says can't remove 'dir name':Permission denied.

Answer

From the sounds of it when you're using the rm command you are getting an error similar to the below error message. (In the below examples 'hope' is the name of our directory)

rm -rf hope
rm: cannot chdir from `.' to `hope': Permission denied

First try using just the -r switch
rm -r hope

If that doesn't work try using the rmdir command

rmdir hope

Additional information about each of the rm and rmdir command can be found on the below links.
http://www.computerhope.com/unix/urm.htm
http://www.computerhope.com/unix/urmdir.htm