please calm down Bl@ck De@th. Proxxs advice was a good one. It does no harm to know something about the platform you run those tools on. You tried to search for sslstrip on your system (find / -name sslstrip.py)? If it is installed you should look for yamas configuration files and provide the right path to your sslstrip installation (don't even have a clue what yamas is but I am sure it has a configuration file.. lol). If you can't find sslstrip on your system you could simply install it to the path yamas is looking for it. If it is there and the path is correct have a look at the permissions. Maybe the user you start yamas with is not allowed to execute sslstrip. This is pretty, pretty basic linux troubleshooting. I can understand proxx's rage here. If you can't do the above on your own you are definitely missing fundamentals of linux usage and you should change that.
This is what im talking about someone that actually helps. I know im far from a pro but proxy doesnīt have to comment if he is only gonna tell me what i dont know.
Insted direct me to a page where i can read this stuff. Not very hard