I want to have the ability to edit my static IP on Ubuntu 16.04 Desktop using only CLI. However, when I do that I have two IP addresses for the same machine: one is assigned by DHCP server and the other taken from /etc/network/interfaces.
Here's the process
Edited /etc/network/interfaces and added static IP. Contents of the file:
# This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). source /etc/network/interfaces.d/* # The loopback network interface auto lo iface lo inet loopback auto enp0s3 iface enp0s3 inet static address 192.168.0.29 netmask 255.255.255.0 network 192.168.0.0 broadcast 192.168.0.255 gateway 192.168.0.1 dns-nameservers 18.104.22.168 22.214.171.124
Stopped and removed Ubuntu Network Manager:
sudo service network-manager stop sudo apt-get purge network-manager
Restarted networking service:
sudo /etc/init.d/networking restart
Also tried to restart interface itself:
ifdown enp0s3 && ifup enp0s3
Tried to reboot the machine, didn't help either.
The result is that I have two IP addresses assigned to my machine. I even tried to ssh to both of them and it's really the same machine.. First one is assigned from DHCP server:
ping 192.168.0.189 PING 192.168.0.189 (192.168.0.189): 56 data bytes 64 bytes from 192.168.0.189: icmp_seq=0 ttl=64 time=0.341 ms 64 bytes from 192.168.0.189: icmp_seq=1 ttl=64 time=0.265 ms 64 bytes from 192.168.0.189: icmp_seq=2 ttl=64 time=0.315 ms 64 bytes from 192.168.0.189: icmp_seq=3 ttl=64 time=0.395 ms
Second one is assigned by editing /etc/network/interfaces
ping 192.168.0.29 PING 192.168.0.29 (192.168.0.29): 56 data bytes 64 bytes from 192.168.0.29: icmp_seq=0 ttl=64 time=0.380 ms 64 bytes from 192.168.0.29: icmp_seq=1 ttl=64 time=0.742 ms 64 bytes from 192.168.0.29: icmp_seq=2 ttl=64 time=0.313 ms 64 bytes from 192.168.0.29: icmp_seq=3 ttl=64 time=0.308 ms
ifconfig produces the same result before and after making the edits:
ifconfig -a enp0s3 Link encap:Ethernet HWaddr 08:00:27:f6:b1:d3 inet addr:192.168.0.189 Bcast:192.168.0.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:13984 errors:0 dropped:0 overruns:0 frame:0 TX packets:1310 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2496671 (2.4 MB) TX bytes:124720 (124.7 KB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:252 errors:0 dropped:0 overruns:0 frame:0 TX packets:252 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1 RX bytes:19145 (19.1 KB) TX bytes:19145 (19.1 KB)
So what is happening here?