A successful ping will look something like this:
$ ping 192.168.1.xx
PING 192.168.1.xx (192.168.1.xx) from 192.168.1.yy : 56(84) bytes of data.
64 bytes from 192.168.1.xx: icmp_seq=0 ttl=64 time=1.104 msec
64 bytes from 192.168.1.xx: icmp_seq=1 ttl=64 time=1.107 msec
64 bytes from 192.168.1.xx: icmp_seq=2 ttl=64 time=1.085 msec
(I obfuscated my addresses with "xx" and "yy"). This will keep going until you stop it with a Ctl-C.
I don't know how you could successfully ping unless both boxes had an IP address. I don't believe you have DHCP set up, so you would need to assign them manually. The only other possibility is zeroconf
which I really don't know anything about.
Both Ubuntu and DSL have an SSH client installed. The box you want to SSH into must have sshd
running. DSL has this installed and you can start it from the control panel. By default Ubuntu does not have it installed. If you wish to SSH into Ubuntu, you will have to install the openssh-server
As I understand it, these computers will not be connected to the Internet. If you ever do decide to connect them to the Internet, be very careful about exposing sshd
to the Internet. There is a lot of activity of people trying to crack into computers via SSH. If you ever decide to do this, there are lots of articles on the Internet about securing SSH.