If you ever wanted to login to Raspberry Pi and got this error “Host key verification failed” it mean you should use ssh-keygen to let your Pi know all other hosts on which you allow login. Here is solution how to fix “Host key verification failed” Raspberry Pi SSH login problem. Simply run this command in terminal from Pi you are using to login to given host
ssh-keygen -R 192.168.0.201
In my case I want to log in to 192.168.0.201