'''Store the key on sshfs share:'''[[BR]]
Install sftp on openwrt:
{{{
ipkg install openssh-sftp-server
}}}

mount the share:
{{{
sshfs root@openwrt2:/mnt/nfs /mnt/tmp
}}}

unmount the share:
{{{
fusermount -u /mnt/tmp
}}}

'''ssh login without password'''[[BR]]
Create keys:
{{{
ssh-keygen -t rsa
}}}
use defaults to have key stored in /root/.ssh/id_rsa.pub[[BR]]

copy key to destination host:
{{{
cat /root/.ssh/id_rsa.pub | ssh root@openwrt2 'cat >> /etc/dropbear/authorized_keys'
ssh root@openwrt2
chmod 0600 /etc/dropbear/authorized_keys
}}}