hello,
When trying to connect via ssh, I get this message :
> Please contact your system administrator.
> Add correct host key in /Users/PAPA/.ssh/known_hosts to get rid of this message.
> Offending ECDSA key in /Users/PAPA/.ssh/known_hosts:5
> ECDSA host key for 192.168.1.15 has changed and you have requested strict checking.
> Host key verification failed.
How can we connect to modifie the file ?
Thanks,
Edit the file listed on your client computer; /Users/PAPA/.ssh/known_hosts.
Delete the 5th line in that file, save it, and try again 
ok connecter but I get core-ssh with root user
That seems correct. Did you expect something else?
I cannot list the fonder and edit the config file
Why not? Do you have some more pointers? Like “I can’t find the file” or “I don’t know where to start?” or maybe you’ve got an error?