How can I keep the network up when I close my laptop lid?

I'm running ubuntu 18.04 on an asus laptop. When I close the lid of the laptop, the laptop drops off my home network.

How can I keep its connection to network open?

Edit /etc/systemd/logind.conf with

sudo gedit /etc/systemd/logind.conf

and change/set

HandleLidSwitch=ignore

Then apply this net setting with

systemctl restart systemd-logind.service

I found this solution here.

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