Use the ip route command to create an ip route manually on Linux.

Posted: March 10, 2016. At: 10:44 AM. This was 2 years ago. Post ID: 8773
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This command will add an IP route to the 172.29.59.1 router using the wlan0 wireless interface card on my laptop.

[email protected]:~$ sudo ip route add 0/0 via 172.29.59.1 dev wlan0

This is part of the process of creating a network connection from your machine to a network when it is necessary to set IP addressing statically.

If the /sbin/ifconfig command will not list your network interface card, try the ip link command.

[email protected]:~$ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 1000
    link/ether b8:ca:3a:c3:81:c4 brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DORMANT group default qlen 1000
    link/ether f4:b7:e2:c9:1b:e3 brd ff:ff:ff:ff:ff:ff
4: vmnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN mode DEFAULT group default qlen 1000
    link/ether 00:50:56:c0:00:01 brd ff:ff:ff:ff:ff:ff
5: vmnet8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN mode DEFAULT group default qlen 1000
    link/ether 00:50:56:c0:00:08 brd ff:ff:ff:ff:ff:ff

To set a static IP address on a network interface on Linux, do it this way. This is using a network mask of 255.255.255.0 or 11111111.11111111.11111111.00000000.

[email protected]:~$ sudo /sbin/ifconfig wlan0 172.29.59.79/24

Now we have a statically assigned IP address on our network interface.

[email protected]:~$ sudo /sbin/ifconfig wlan0
wlan0     Link encap:Ethernet  HWaddr f4:b7:e2:c9:1b:e3  
          inet addr:172.29.59.79  Bcast:172.29.59.255  Mask:255.255.255.0
          inet6 addr: fe80::f6b7:e2ff:fec9:1be3/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:271481 errors:0 dropped:0 overruns:0 frame:0
          TX packets:181989 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:266603848 (254.2 MiB)  TX bytes:29934296 (28.5 MiB)

If Internet connectivity is required, edit the /etc/resolv.conf file and add nameservers to allow the computer to resolve domain names and access websites.

[email protected]:~$ cat /etc/resolv.conf 
# Generated by NetworkManager
search det.nsw.edu.au
nameserver 192.168.1.1
nameserver 8.8.8.8
nameserver 8.8.4.4

The above /etc/resolv.conf file is for a home user that has a router IP address of 192.168.1.1 and is wanting to use Google Domain Name Service to help resolve Internet IP addresses. I had to do this when trying to setup the Blackarch Linux distribution and it did not setup an Internet connection automatically. It was necessary to do this manually.

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