How do I display all available network interfaces names under Linux operating systems using bash shell prompt? How do use the ip command to list interfaces / NIC on Linux?
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.
| Tutorial details | |
|---|---|
| Difficulty level | Easy |
| Root privileges | No |
| Requirements | None |
| Est. reading time | 4 minutes |
List Network Interfaces Using ip Command on Linux
Type the following ip command, enter:$ ip link show
Here is what we see:
$ 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
source: https://www.cyberciti.biz/faq/linux-list-network-interfaces-names-command/