Gfilui

When I ran software updater, everything went fine except for Avahi DNS config Tool. It told me:

Package operation failed. Installation or removal of package failed.

I have tried:

apt -y update
apt-get dist-upgrade
apt-get clean
apt -y autoremove

First command is worth to run:

sudo dpkg --configure -a

Then step by step:

sudo apt autoclean
sudo apt clean
sudo rm /var/lib/apt/lists/* -vf
sudo apt update

I searched for the error message that I kept encountering at https://gist.github.com/bgoodr/d77d997fe02af47c3a837e9b94256897#file-transcript_log6-txt-L26 which was:

dpkg: error processing archive /var/cache/apt/archives/avahi-dnsconfd_0.6.32-1ubuntu1.1_amd64.deb (--unpack):

and found the answer at https://askubuntu.com/a/1022548/340383 that has the final commands I used that fixed the problem.

Package operation failed is the result.

Now running Software Updater finishes successfully and is requiring a reboot.

A few other things to try:

sudo apt-get --fix-broken install

That normally fixes partial or broken installations. If it fails, add the output messages to your original question.

This probably mean something was stuck in "dependency hell" or dpkg just messed up somewhere. To fix this try these commands.

Try forcefully deleting and refreshing your package lists with new remote ones.

sudo rm /var/lib/apt/lists/* -vf
sudo apt update

Once done, try cleaning and removing unnecessary files & packages.

sudo apt autoclean
sudo apt clean
sudo apt autoremove

Remove the package you are having trouble with.

sudo apt remove <package>

Next, try getting dpkg to resolve the issue on it's own.

sudo dpkg --configure -a

Next, try getting apt to resolve the issue on it's own.

sudo apt -f install

Last, try installing it again.

sudo apt install <package>

You could help all of us by running "lsb_release" and telling us which version of Ubuntu you are running, and also provide the contents of your /etc/apt.d/sources.list.