You can use the following commands to see all network interfaces under Linux operating systems:
- ip command – It is used to show or manipulate routing, devices, policy routing and tunnels.
- netstat command – It is used to display network connections, routing tables, interface statistics, masquerade connections, and multicast memberships.
- ifconfig command – It is used to display or configure a network interface.
List Network Interfaces Using ip Command on Linux
Type the following ip command, enter:
$ ip link show
Sample outputs:
$ 1: lo: mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: eth0: mtu 1500 qdisc mq state UP qlen 1000 link/ether b8:ac:6f:65:31:e5 brd ff:ff:ff:ff:ff:ff 3: wlan0: mtu 1500 qdisc mq state DOWN qlen 1000 link/ether 00:21:6a:ca:9b:10 brd ff:ff:ff:ff:ff:ff 4: vboxnet0: mtu 1500 qdisc noop state DOWN qlen 1000 link/ether 0a:00:27:00:00:00 brd ff:ff:ff:ff:ff:ff 5: pan0: mtu 1500 qdisc noop state DOWN link/ether c2:10:fa:55:8e:32 brd ff:ff:ff:ff:ff:ff 6: vmnet1: mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000 link/ether 00:50:56:c0:00:01 brd ff:ff:ff:ff:ff:ff 7: vmnet8: mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000 link/ether 00:50:56:c0:00:08 brd ff:ff:ff:ff:ff:ff 11: ppp0: mtu 1496 qdisc pfifo_fast state UNKNOWN qlen 3 link/ppp
Where,
- lo – Loopback interface.
- eth0 – My first Ethernet network interface on Linux.
- wlan0 – Wireless network interface in Linux.
- ppp0 – Point to Point Protocol network interface which can be used by dial up modem, PPTP vpn connection, or 3G wireless USB modem.
- vboxnet0, vmnet1, vmnet8 – Virtual machine interface working in bridge mode or NAT mode on Linux.
Linux show / display available network interfaces using nmcli
One can list available devices and their status on Linux, run:
$ nmcli device status
OR
$ nmcli connection show
Linux list all network interfaces using nmcli and ip command
Show a table of all network interfaces using netstat command in Linux
Type the following command:
$ netstat -i
Sample outputs:
Kernel Interface table Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg eth0 1500 0 2697347 0 0 0 2630262 0 0 0 BMRU lo 16436 0 2840 0 0 0 2840 0 0 0 LRU ppp0 1496 0 102800 0 0 0 63437 0 0 0 MOPRU vmnet1 1500 0 0 0 0 0 49 0 0 0 BMRU vmnet8 1500 0 0 0 0 0 49 0 0 0 BMRU
Linux ip list interfaces using ifconfig command
Type the following ifconfig command:
$ /sbin/ifconfig -a
Sample outputs:
eth0 Link encap:Ethernet HWaddr b8:ac:6f:65:31:e5 inet addr:192.168.2.100 Bcast:192.168.2.255 Mask:255.255.255.0 inet6 addr: fe80::baac:6fff:fe65:31e5/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:2697529 errors:0 dropped:0 overruns:0 frame:0 TX packets:2630541 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2159382827 (2.0 GiB) TX bytes:1389552776 (1.2 GiB) Interrupt:17 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:16436 Metric:1 RX packets:2849 errors:0 dropped:0 overruns:0 frame:0 TX packets:2849 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:2778290 (2.6 MiB) TX bytes:2778290 (2.6 MiB) ppp0 Link encap:Point-to-Point Protocol inet addr:10.1.3.105 P-t-P:10.0.31.18 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1496 Metric:1 RX packets:102800 errors:0 dropped:0 overruns:0 frame:0 TX packets:63437 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:148532544 (141.6 MiB) TX bytes:4425518 (4.2 MiB) vmnet1 Link encap:Ethernet HWaddr 00:50:56:c0:00:01 inet addr:192.168.47.1 Bcast:192.168.47.255 Mask:255.255.255.0 inet6 addr: fe80::250:56ff:fec0:1/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:49 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) vmnet8 Link encap:Ethernet HWaddr 00:50:56:c0:00:08 inet addr:172.16.232.1 Bcast:172.16.232.255 Mask:255.255.255.0 inet6 addr: fe80::250:56ff:fec0:8/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:49 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
How do I see routing table on Linux?
Use the following command:
ip r
Sample outputs:
0.0.0.0/1 via 10.8.0.1 dev tun0 default via 192.168.2.254 dev enp6s0 proto static metric 100 10.8.0.0/24 dev tun0 proto kernel scope link src 10.8.0.2 128.0.0.0/1 via 10.8.0.1 dev tun0 139.59.1.155 via 192.168.2.254 dev enp6s0 169.254.0.0/16 dev virbr0 scope link metric 1000 linkdown 192.168.2.0/24 dev enp6s0 proto kernel scope link src 192.168.2.24 metric 100 192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 linkdown
How do I see arp cache connected to my NIC on Linux?
Run arp command:
arp
arp -a
arp -e
arp -n
Sample outputs:
Address HWtype HWaddress Flags Mask Iface centos7 ether 00:01:c0:1c:09:4c C enp6s0 freebsd11-box ether 00:01:c0:1c:09:4c C enp6s0 192.168.2.203 ether 00:01:c0:1c:09:4c C enp6s0 fw0-pfsense-sg-3100.swe ether 00:08:a2:0d:05:41 C enp6s0 192.168.2.205 ether 00:01:c0:1c:09:4c C enp6s0 192.168.2.202 ether 00:01:c0:1c:09:4c C enp6s0
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thanks alot dear
Thanks man !
Thanks man, it helped a lot,
ip addr show
shows the ip address of lo, en0xxxxx and enoxxxx on my Centos.
Hi , I just installed CentOS Justė 7 minimal, and when I write the ” ip link show ” This cmd show me a single network interface ( lo ) , so my question is : how do I install other interfacess?
thank you !!
Thanks.
None of the above turned out to be what I was looking for though.
I wanted to see what other devices were on the same network as the computer I was typing the command into.
The answer (in case others are looking for the same) was
arp -awhich output the IP addresses and MAC addresses of other devices.