How do you revert or reinstall a configuration file in Debian/Ubuntu?

I accidentally overwrote the file /etc/bluetooth/main.conf. Running dpkg -S /etc/bluetooth/main.conf shows that the package bluez provides it, but when I run sudo apt-get install --reinstall bluez, it doesn't get reinstalled.

  • Related (possibly dupe) unix.stackexchange.com/a/12748/4671 Apr 18, 2016 at 6:56
  • Lets turn this duplicate arround, this question deals with the more generic problem and has an answer that goes to the point solving the problem stated in the title.
    – Braiam
    Apr 1, 2021 at 11:28

2 Answers 2


You should mv the file out of the way:

mv /etc/bluetooth/main.conf /etc/bluetooth/main.conf.old
apt-get -o DPkg::options::=--force-confmiss --reinstall install bluez

I don't know if you can get apt to overwrite an existing config file, that's why you should move it out of the way first.


Solution 1

Run the following command, replacing package-name with the name of the package:

sudo apt-get -o Dpkg::Options::="--force-confmiss" install --reinstall package-name

Solution 2

If you have .deb package then go to that directory where package is exist and run,

dpkg -i --force-confmiss package-name.deb

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