Every computer will have an IP address. Sometimes the address is set manually, but most of the time a router gives out the address after the computer requests an address. That’s a DHCP request, and the address is given in a DHCP response. The router will usually have a web interface and either a log of addresses it gave out, or some sort of table you can view. Every computer has a “fake” address which is really just itself, “127.0.0.1”…the address associated with your wired ethernet will have a similar format. When I say “IP” I’m implying this numeric address.
If you have direct access to the Jetson, then “ifconfig eth0” should give you the address for wired ethernet (it is the “inet” address you are interested in…if there is no inet address, then DHCP failed).
FYI, the technical name of that format is “dotted-decimal”. Names like “google.com” are also an address, but a service looks this up and does a name to number translation…in the end that numeric dotted-decimal address is what you will use. It is critical to find that address.
Command line is just the text terminal. Let’s assume your host knows the Jetson has address “184.108.40.206” (it doens’t really…that’s just a contrived example). You could ping on the command line by typing in:
# control-c to stop ping
You can connect via ssh:
…it’ll prompt for a user name and password.
You can connect specifically to the account “nvidia”…it’ll still prompt for password, but it won’t prompt for user:
When done with your ssh connection you can type “exit”.
JetPack uses ssh, and specifically the “nvidia” account. “scp” is an ssh copy mechanism and uses the same “name@IP” syntax. If ssh works for “email@example.com”, then scp can also work with “firstname.lastname@example.org”.
Try to ping the address. Should that succeed, try to ssh to the nvidia account at that address. Should that succeed, then JetPack should succeed if you enter that address and the password for user nvidia.