Hey guys I am currently attempting a MITM attack using ettercap/sslstrip and when I come around to type the following command:

ssltrip -a -k -f
It replies with the following:

sslstrip: command not found
I am probably doing something stupid but I honestly can't think of why and I have searched Google etc and can't find the answer to my problem.

I have also tried 'apt-get install ssltrip' and it says it is already installed etc.

Any help appreciated,