echo hostname=<hostname> >> /etc/rc.conf
echo dhcpcd=YES >> /etc/rc.conf
/etc/rc.d/dhcpcd start

Add OpenSSH to startup:

echo sshd=YES >> /etc/rc.conf
/etc/rc.d/sshd start

Setup ntp-client:

echo ntpd=YES >> /etc/rc.conf
echo ntpdate=YES >> /etc/rc.conf