GNU/Linux Network Configuration Interface details
Example
Ifconfig
List all the interfaces available on the machine
$ ifconfig -a
List the details of a specific interface
Syntax: $ ifconfig <interface>
Example:
$ ifconfig eth0
eth0 Link encap:Ethernet HWaddr xx:xx:xx:xx:xx:xx
inet addr:x.x.x.x Bcast:x.x.x.x Mask:x.x.x.x
inet6 addr: xxxx::xxx:xxxx:xxxx:xxxx/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4426618 errors:0 dropped:1124 overruns:0 frame:0
TX packets:189171 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:382611580 (382.6 MB) TX bytes:36923665 (36.9 MB)
Interrupt:16 Memory:fb5e0000-fb600000
Ethtool - query the network driver and hardware settings
Syntax: $ ethtool <interface>
Example:
$ ethtool eth0
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: on (auto)
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes
ip - show / manipulate routing, devices, policy routing and tunnels
Syntax: $ ip { link | ... | route | macsec } (please see man ip for full list of objects)
Examples
List network interfaces
$ ip link show
Rename interface eth0 to wan
$ ip link set dev eth0 name wan
Bring interface eth0 up (or down)
$ ip link set dev eth0 up
List addresses for interfaces
$ ip addr show
Add (or del) ip and mask (255.255.255.0)
$ ip addr add 1.2.3.4/24 brd + dev eth0
