Cubian Wiki · GitHub Get Started With Cubian Cubietruck

8/10/2019 Cubian Wiki GitHub Get Started With Cubian Cubietruck

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Get started with Cubian

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LED indicators

Cubian uses the two onboard LED (Blue and Green) as the indicator of some events.

The green LED indicate system status. If this LED blinking every 1 second, it means

the system istarting upor hutting downnormally, after the system has started

this LED turns to indicates the SD-card r/w status.

The blue LED indicate the network status. if this LED starts to blink every 1 second, it

means the system didOT connected to a network, after the system has connected

to network successfully, this LED will turnFF .

Morse Code IP

This is the fun part of Cubian.orse code is an old communication technology. It is so

simple that makes it still very useful in some scenarios today. Consider the following

scenarios

1.You have a monitor with DVI,VGA dual input but w/o HDMI

2.You forgot to buy a USB-TTL cable

3.You don t have the admin privilege to the router, even you know the cubieboard

connected to the network, but you don t know the IP address.

Clone this wiki locally

If you still want to play your cubieboard you need to know the IP address.Here comes the

solution. Cubian will use Morse code to echo the IP address to you once it owns one.

Clone in Desktop

Once the network connected, after 30 seconds (waiting for dhcp response). The green

LED will turnedN for seconds, it reminds you need to focus your mind, and prepare to

write down the morse code. After the green LED turnedFF . The blue LED starts to show

the morse code to you.

Note,You just want to know the last 3 digits of IP address under most circumstances, so

the echo sequence is reversed. For example, if the IP address is

192.168.1.100

the echo

sequence will be

001.1.861.291

. the Morse code will be

----- ----- O---- O-O-O- O---- O-O-O- ---OO -OOOO O---- O-O-O- OO--- ----O O----

It will take about 74 seconds to complete the process. Their is 2 seconds resting time after

each symbol.

The map from blue LED lighting time to morse code

Lighting Time Means

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Lighting Time Means

0.5 sec O

1 sec -

Part ofnternational Morse Code Table

Symbol Morse

0 - - - - -

1 O - - - -

2 O O - - -

3 O O O - -

4 O O O O -

5 O O O O O

6 - O O O O

7 - - O O O

8 - - - O O

9 - - - - O

. O - O - O -

It's less fun but if you are in a hurry or don't know your morse very well you should be able

to spot the ip address with:

arp -a

SSH

The SSH Server port has changed to 36000 (default 22) to prevent somebody using the

scanner scan and hack your system. For the same security reason,oot user isOT

allowed to login via SSH. But you can usesudo -i command to change tooot after you

logged in as a normal user via SSH.

The default username isubie, password is the same as username, once your logged in,

you can do anything withsudo , and don't need to type the password again.

ssh -p 36000 YOUR_CUBIEBOARD_IP -l cubie

Enable root

The root user isOT enabled by default. You can enable it by the following command

cubie@Cubian:~ sudo passwd root

Enter new UNIX password:

Retype new UNIX password:

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passwd: password updated successfully

Connect to network

First of all, Do not use low level configuration tools such as ifconfig and ip commands to

configure an interface in up state.

For more details about network configuration, take a look at the officialebian reference

manual

1.Wired

There is already a default configuration for you.

cubie@Cubian:~# sudo cat /etc/network/interfaces

auto eth0

allow-hotplug eth0

iface eth0 inet dhcp

Explanations:

auto eth0 means auto config interfaceth0 on start up

allow-hotplug eth0and iface eth0 inet dhcpmeans when the Linux kernel detects

the physical interface eth0, the allow-hotplug stanza causes ifup to bring up the

interface and the iface stanza causes ifup to use DHCP to configure the interface.

Note:This configuration will bring up your RJ45 network interface on startup, and try

to config it through dhcp service.f you don't plugin network cable, it will block the

startup for 1 minute waiting for DHCP timeout then continue to boot up

If you absolutely don't need the wired network,plase disable this feature by comment

or deleteauto eth0 at/etc/network/interfaces, It will save a lot of time for you on

system start up. To comment it, just add a# before the lineauto eth0,It will looks

like#auto eth0

You can still bring up and config the wired interface manually, just do

cubie@Cubian:~# ifup eth0

If you want to use static IP configuration, There is a sample below

allow-hotplug eth0

iface eth0 inet static

address 192.168.11.100

netmask 255.255.255.0

gateway 192.168.11.1

dns-domain example.com

dns-nameservers 192.168.11.1

It should be familiar with you.

2.Wireless

i.Check that there is wlan0 interface in iwconfig's output. If there isn't, modprobe

the necessary module (e.g. modprobe bcmdhd for cubietruck).

ii.Open (No Password)

Modify the network configuration file

cubie@Cubian:~# sudo cat>>/etc/network/interfaces


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>allow-hotplug wlan0

>iface wlan0 inet dhcp

> wireless-essid mynetwork

>EOF

Then, connect to network by execute

cubie@Cubian:~# ifup wlan0

If you want to connect network on system start up, just add

auto wlan0

iii.EP

Warning: WEP encryption has been proven insecure and can be cracked in

a few minutes using free utilities that can be downloaded from the

Internet.Never use it if your network is sensitive.Modify the network

configuration file

cubie@Cubian:~# sudo cat>>/etc/network/interfacesiface wlan0 inet dhcp

> wireless-essid mynetwork

> wireless-key1 1234567890

>EOF




auto wlan0

iv.WPA/WPA2

First, you need to generate PSK (Pre Shared Key).

cubie@Cubian:~# wpa_passphrase mynetwork 1234567890 | grep psk=[a-f,0-9]

psk=000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f

Then, modify

/etc/network/interfaces

add network configuration

cubie@Cubian:~# sudo cat>>/etc/network/interfacesiface wlan0 inet dhcp

> wpa-ssid mynetwork

> wpa-psk 000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f

>EOF




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auto wlan0

Config DateTime

The datetime will be configured automatically throughntp service on each time the

system starting up and connected to internet.

You can sync the datetime from internettp servermanually.

cubie@Cubian:~ sudo ntpdate-debian

29 May 19:52:44 ntpdate[6746]: adjust time server 212.26.18.41 offset 0.008102 sec

Cubian update

It's a good idea to keep the kernel and drivers, firmwares to the latest version.

apt-get install cubian-update

sudo cubian-update

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