[skocznymroczny]

Unfortunately it doesn't work when trying to connect via ssh and warning about unknown key pops up.

[hnlmorg]

That is intentional behavior on the part of `ssh`. You can still disable that prompt within `ssh` (though it's not recommended):

    ssh -oStrictHostKeyChecking=no 192.168.0.100

...or by adding rules in /etc/ssh/ssh_config or ~/.ssh/config

    Host 192.168.0.*
        StrictHostKeyChecking no