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When I typed sudo dpkg-reconfigure resolvconf this was the error.

dpkg-query: package `resolvconf' is not installed and no information is available
Use dpkg --info (= dpkg-deb --info) to examine archive files,
and dpkg --contents (= dpkg-deb --contents) to list their contents.
/usr/bin/dpkg-reconfigure: resolvconf is not installed
karel
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Byte_Knight
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    Your question and the contents within are completely different questions. What's your actual issue? Wifi, or resolvconf being missing? – Thomas Ward Feb 01 '18 at 00:36

1 Answers1

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Open the terminal and type: 

sudo apt install resolvconf  
sudo systemctl restart resolvconf  
sudo dpkg-reconfigure resolvconf  
sudo lshw -C network # shows wireless adapter information
karel
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  • https://askubuntu.com/questions/966870/dns-not-working-after-upgrade-17-04-to-17-10/967341#967341 – karel Jan 31 '18 at 15:55