[ARCH] Configure wired network
Wired
Follow this procedure if you need to set up a wired connection via a static IP address.
First, disable the dhcpcd service which was started automatically at boot:
# systemctl stop dhcpcd.service
Identify the name of your Ethernet interface.
# ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp2s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT qlen 1000
link/ether 00:11:25:31:69:20 brd ff:ff:ff:ff:ff:ff
3: wlp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DORMANT qlen 1000
link/ether 01:02:03:04:05:06 brd ff:ff:ff:ff:ff:ff
In this example, the Ethernet interface is
enp2s0f0. If you are unsure, your Ethernet interface is likely to start with the letter "e", and unlikely to be "lo" or start with the letter "w". You can also use iwconfig and see which interfaces are not wireless:# iwconfig
enp2s0f0 no wireless extensions.
wlp3s0 IEEE 802.11bgn ESSID:"NETGEAR97"
Mode:Managed Frequency:2.427 GHz Access Point: 2C:B0:5D:9C:72:BF
Bit Rate=65 Mb/s Tx-Power=16 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=61/70 Signal level=-49 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:430 Missed beacon:0
lo no wireless extensions.
In this example, neither
enp2s0f0 nor the loopback device have wireless extensions, meaning enp2s0f0 is our Ethernet interface.
You also need to know these settings:
- Static IP address.
- Subnet mask.
- Gateway's IP address.
- Name servers' (DNS) IP addresses.
- Domain name (unless you are on a local LAN, in which case you can make it up).
Activate the connected Ethernet interface (e.g.
enp2s0f0):# ip link set enp2s0f0 up
Add the address:
# ip addr add ip_address/subnetmask dev interface_name
For example:
# ip addr add 192.168.1.2/24 dev enp2s0f0
For more options, run
man ip.
Add your gateway like this, substituting your own gateway's IP address:
# ip route add default via ip_address
For example:
# ip route add default via 192.168.1.1
Edit
resolv.conf, substituting your name servers' IP addresses and your local domain name:# nano /etc/resolv.conf
nameserver 61.23.173.5 nameserver 61.95.849.8 search example.com
You should now have a working network connection. If you do not, check the detailed Network Configuration page.
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