rsh problem
 

I'm trying to rsh to the localhost. The following works fine:

rsh localhost

...but this doesn't work:

rsh localhost -n true

I get a "permission denied" message. I need to be able to run the previous command, but it never lets me in. I don't really know what the "-n" and "true" are doing or whether they are related. If I try:

rsh localhost true

...I get the same "permission denied" message, but if I try:

rsh localhost -n

...it tells me -n is an invalid option.