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I have followed a number of tutorials recommending different things with netplan for connecting to the internet. None of them have worked. Should i be trying to connect with something else? or should netplan work and i have done something wrong? If you know of some tutorial i can follow that would help that would be much appreciated, thanks.

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    What tutorials specificaly did you follow, what didn't work, what was the output? Netplan is certainly the recommended interface to use on Ubuntu 20.04.
    – slangasek
    Jun 11, 2020 at 17:50
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    Could you please show the netplan config from /etc/netplan/*.yaml which is not working for you?
    – Slyon
    Jun 22, 2020 at 15:26
  • for me systemctl status netplan-wpa-wlp3s0.service reported that /sbin/wpa_sipplicant cant be found. i will try to install it through eth and try again :(
    – nerkn
    Aug 25, 2020 at 18:42

2 Answers 2

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If Netplan doesn't work, one alternative (there might be others) is to connect up to the wireless LAN the old-fashioned way using wpa_supplicant:

Note: All these commands should be run as root or with sudo:

First, check which interfaces you are working with:

ip link

You should see an interface beginning with "wlan" or "wlp" - for example: wlan0 or wlp2s0. Bring this interface up:

ip link set <interface> up

For example, if wlp2s0 is the interface:

ip link set wlp2s0 up

Create the wpa_supplicant configuration file with the following command (assuming your network is WPA-PSK encrypted):

wpa_passphrase "<SSID>" "<Password>" > /etc/wpa_supplicant/wpa_supplicant.conf

For example:

wpa_passphrase "MyHomeNetwork" "abcd1234" > /etc/wpa_supplicant/wpa_supplicant.conf

Start wpa_supplicant in the background:

wpa_supplicant -Bc /etc/wpa_supplicant/wpa_supplicant.conf -i <interface>

Finally, if you are using a DHCP connection, start dhclient:

dhclient <interface>

Now test your connection (optional):

ping ubuntu.com -c 5
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    Thank you so much this worked!
    – jap101
    Jun 11, 2020 at 11:23
  • This answer works, people. It was sad to find that after a lot of years not using Ubuntu Server most of the old ways of network configuration are not working. Hell, even the USB installer crashed two times on supported hardware ...
    – 1000Gbps
    Jul 19, 2020 at 11:49
  • installing wpa_supplicant worked for me too - but it's disappointing that I had to plug in an ethernet cable to be able to install it. Come on Ubuntu, don't make me go searching for a long enough ethernet cable again!
    – icewhite
    Mar 17, 2021 at 15:10
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netplan is able configure but underlaying system fails. ubuntu server 20.04 dont include wpasupplicant (which is only 1.4Mb), You should connect ethernet cable and restart then

apt install wpasupplicant
netplan apply

in 1 minutes it connects.

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