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Asked: 2018-01-06 12:29:38 +0800 CST

edit /etc/network/interfaces with wlp3s0 instead of wlan0

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There is a nice answer on how to connect to a certain wifi network using the interfaces file:

Next, I suggest you edit /etc/network/interfaces:

auto lo
iface lo inet loopback

auto wlan0
iface wlan0 inet static
address 192.168.1.150
netmask 255.255.255.0
gateway 192.168.1.1
wpa-essid MYESSID12345
wpa-psk MYPASSWORD$1234567

Of course, substitute your details here. Restart the interface:

sudo ifdown wlan0 && sudo ifup -v wlan0

Test:

ping -c3 www.ubuntu.com

If you get ping results, you are connected.

I had this working but now I want to try this on different computer where wlan0 is changed to wlp3s0. How do I modify the interfaces file to utilize wlp3s0 instead of wlan0? Replacing the word wlan0 with wlp3s0 but it didn't work. Here is output from ifconfig

bakalolo@User1:/etc/network$ ifconfig
enp0s20u5c4i2 Link encap:Ethernet  HWaddr de:a4:ca:76:cf:5b  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

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:65536  Metric:1
          RX packets:850 errors:0 dropped:0 overruns:0 frame:0
          TX packets:850 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:71483 (71.4 KB)  TX bytes:71483 (71.4 KB)

wlp3s0    Link encap:Ethernet  HWaddr 18:65:90:d7:20:45  
          inet addr:192.168.0.102  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::f431:c4c2:b266:ec4e/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:423 errors:0 dropped:0 overruns:0 frame:0
          TX packets:625 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:134835 (134.8 KB)  TX bytes:147654 (147.6 KB)
networking

1 Answers

  1. It is certainly necessary to declare the correct interface, in this case wlp3s0. Moreover, it is necessary to specify a static address in the range of the network you are trying to connect to; for instance, the file you are attempting to copy is in the range of 192.168.1.x. As you can see from your current ifconfig, the address you have now is in the range of 192.168.0.x. A wireless router in the 192.168.0.x neighborhood isn’t going to give you an address of 192.168.1.150.

    It is also crucial to select a static IP address that is outside the range used for DHCP. Please see this example of a typical router administration page:

    enter image description here

    As you see, in this example, the router assigns DHCP addresses from 192.168.1.110 to 192.168.1.159. Therefore, any static IP addresses should be selected either in the range 192.168.1.2 to 192.168.1.109 or else in the range of 192.168.1.150 to 192.168.1.253.

    It is important not to specify a static IP address that collides with an existing device. If you know or can find out the range used in the router, your course is clear. If you do not, you are better off to stick to DHCP. Then, I’d suggest that your file read:

    auto lo
iface lo inet loopback

auto wlp3s0
iface wlp3s0 inet dhcp
wpa-essid MYESSID12345
wpa-psk MYPASSWORD$1234567
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