My /etc/network/interfaces file looks like:
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# The loopback network interface
auto lo
iface lo inet loopback
# The wired network interface
auto enp1s0
iface enp1s0 inet dhcp
# The wireless network interface
auto wlp0s20f3
iface wlp0s20f3 inet dhcp
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● networking.service - Raise network interfaces
Loaded: loaded (/lib/systemd/system/networking.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Mon 2021-02-08 16:33:26 CST; 10s ago
Docs: man:interfaces(5)
Process: 21425 ExecStart=/sbin/ifup -a --read-environment (code=exited, status=1/FAILURE)
Main PID: 21425 (code=exited, status=1/FAILURE)
Feb 08 16:33:25 user dhclient[21452]: than a configuration issue please read the section on submitti
Feb 08 16:33:25 user dhclient[21452]: bugs on either our web page at www.isc.org or in the README fi
Feb 08 16:33:25 user dhclient[21452]: before submitting a bug. These pages explain the proper
Feb 08 16:33:25 user dhclient[21452]: process and the information we find helpful for debugging.
Feb 08 16:33:25 user dhclient[21452]:
Feb 08 16:33:25 user dhclient[21452]: exiting.
Feb 08 16:33:26 user ifup[21425]: ifup: failed to bring up wlp0s20f3
Feb 08 16:33:26 user systemd[1]: networking.service: Main process exited, code=exited, status=1/FAIL
Feb 08 16:33:26 user systemd[1]: networking.service: Failed with result 'exit-code'.
Feb 08 16:33:26 user systemd[1]: Failed to start Raise network interfaces.
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Internet Systems Consortium DHCP Client 4.4.1
Copyright 2004-2018 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Cannot find device "wlp0s20f3"
Failed to get interface index: No such device
If you think you have received this message due to a bug rather
than a configuration issue please read the section on submitting
bugs on either our web page at www.isc.org or in the README file
before submitting a bug. These pages explain the proper
process and the information we find helpful for debugging.
exiting.
ifup: failed to bring up wlp0s20f3