Interface eth0 not configured

Question

I'm trying to setup a static ip address. Here's my /etc/network/interfaces:

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

# primary network interfaces
auto eth0
iface eth0 inet static
        address 192.168.1.88
        netmask 255.255.255.0
        network 192.168.1.0
        broadcast 192.168.1.255
        gateway 192.168.1.1
        dns-nameservers 127.0.1.1

Apparently, my machine does not have eth0 at all. I've looked around and everyone says to configure the above file with eth0. Are there any other ways to set a static ip address using these devices?

$ ifconfig -a
eno1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 1c:1b:0d:0a:86:00  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 20  memory 0xdf400000-df420000  

enp82s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.7  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::9b71:b459:c8d8:4bc5  prefixlen 64  scopeid 0x20<link>
        ether 1c:1b:0d:0a:85:fe  txqueuelen 1000  (Ethernet)
        RX packets 3712  bytes 2691239 (2.6 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1501  bytes 157372 (157.3 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device memory 0xdf200000-df21ffff  

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1  (Local Loopback)
        RX packets 25268  bytes 1537593 (1.5 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 25268  bytes 1537593 (1.5 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlp83s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether e4:b3:18:8c:05:87  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Solution

Yes. Just replace eth0 with one of the other interfaces.

For example:

auto eno1
iface eno1 inet static
        address 192.168.1.88
        netmask 255.255.255.0
        network 192.168.1.0
        broadcast 192.168.1.255
        gateway 192.168.1.1
        dns-nameservers 127.0.1.1

Comments

[Soubriquet]

Could I use lo? According to netstat -i, lo's MTU is higher.

[Russell Sim]

No you cannot. lo is your loopback interface.

[Soubriquet]

Ok. Does it matter which one I choose? I don't know the difference between these interfaces.

[Soubriquet]

Just tried switching to eno1 instead off eth0. When I try sudo ifdown eno1, I get: ifdown: interface eno1 not configured.

[Russell Sim]

All of these interfaces represent separate physical network interfaces on your machine. Are you are trying to change the IP address of enp82s0, which currently has an IP address of 192.168.1.7 to 192.168.1.88? If so, please pick enp82s0

[Soubriquet]

I just tried enp82s0 and that didn't work. ifconfig still shows 192.168.1.7.

[Russell Sim]

ifdown enp82s0 && ifup enp82s0

[Soubriquet]

That gives me: if down: failed to open lockfile /run/network/if state.enp82s0: Permission denied

[Soubriquet]

Adding sudo with that gives me: ifdown: interface enp82s0 not configured

[Russell Sim]

unix.stackexchange.com/questions/50602/… for your issue with ifdown

[Soubriquet]

my /run/network/ifstate already contains lo=lo and enp82s0=enp82s0, but I still get the aforementioned issues.

[Soubriquet]

Turns out I just needed to reboot my system. Thanks for the help.