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.razavi@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