I was looking around for instructions on how to do this but did not see any good docs. - jho

@castle:~$ /opt/sbin/dropbearkey -t rsa -f .ssh/id_rsa - jho

@castle:~$ /opt/sbin/dropbearkey -f .ssh/id_rsa -y | grep ssh-rsa > .ssh/id_rsa.pub - jho

Take the usual steps of copying id_rsa.pub to .ssh/authorized_keys on the target machine. - jho

Test things out with "ssh -i ~/.ssh/id_rsa <target host>" - jho