mikrotik ssh keys

Generate ssh key:

$ ssh-keygen -f mikrotik.key

will (with recent OpenSSH) generate an ED25519 key, which RouterOS has supported since 7.12. Copy it to the device (implicitly to /):

$ scp mikrotik.key.pub admin@1.2.3.4:

create a user and then assign that key to it:

[admin@sw] > /user add name=someuser group=read disabled=no
[admin@sw] > /user ssh-keys import public-key-file=mikrotik.key.pub user=someuser