that's getting interesting. after sudo /etc/init.d/networking restart, the
eth0 got my desire static IP(*192.168.1.30*).(not after sudo reboot).
however, here is another problem:
*192.168.1.15 *is the old ip of the board before restarting the network.
however, I can still connect to board using *192.168.1.15* (I flushed the
arp table of computer, but still the same result)
=======================================================
blahblahblah:~$ ssh linaro@*192.168.1.15*
linaro@192.168.1.15's password:

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Mon Feb 26 03:11:54 2018 from 192.168.1.12
linaro@kay:~$ sudo ifconfig
eth0      Link encap:Ethernet  HWaddr blahbblahblah
          inet addr:*192.168.1.30*  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: blahblahblah Scope:Link
          UP BROADCAST RUNNING MULTICAST DYNAMIC  MTU:1500  Metric:1
          RX packets:637 errors:0 dropped:0 overruns:0 frame:0
          TX packets:425 errors:0 dropped:0 overruns:0 carrier:1
          collisions:0 txqueuelen:1000
          RX bytes:65596 (64.0 KiB)  TX bytes:59460 (58.0 KiB)
=========================================================

On Sun, Feb 25, 2018 at 7:01 PM, ahmad <ahmad.raz...@gmail.com> wrote:

> Hi
> I am trying to set static ip on my board (eth0 which is shown in the
> output of ifconfig).
>
> I edited the /etc/network/interfaces to this, and rebooted my board.
> =====================
> auto lo
> iface lo inet loopback
>
> auto eth0
> iface eth0 inet static
>     address 192.168.1.30
>     gateway 192.168.1.1
>     netmask 255.255.255.0
>     network 192.168.1.0
>     broadcast 192.168.1.255
> =====================
> but the baord still get ip from dhcp. How I can resolve this problem?
>
> this is the linux I am using:
> Linux 4.4.0-linaro-lt-qcom #2 SMP PREEMPT Wed Feb 24 15:41:26 UTC 2016
> armv7l GNU/Linux
>
> Thanks
>
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