Fairly new to ubuntu and every command I run gives me this error.
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When you did the upgrade to 18.10, in some cases, it changed working repository locations, to locations looking for repositories compatible with cosmic. Not all repositories have cosmic compatible files, hence the error.
For each error, go to the http:// location, like:
http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu/
and then click on the dists link, and view what the latest supported Ubuntu version is listed... in this example, it would be xenial (not cosmic).
Open the Software & Updates app, go to the Other Software tab, and change the Wine properties from cosmic to xenial. When you've made all of the changes, close the window, and click the Reload button to update the software databases.
Update #1:
In terminal...
cd /etc/apt/sources.list.d # change directory
grep -i nvidia *.list # find out which filename to edit
more nvidia.list # view the correct found fileneme
# check the http web site as per my earlier instructions and
# determine the most recent Ubuntu version (if it isn't cosmic)
sudo pico nvidia.list # put in the proper found filename to edit
sudo apt-get update # you may have errors here if you didn't fix the other errors
sudo apt-get install dkms nvidia-dkms-390 nvidia-utils-390 # install
reboot # reboot the computer
heynnema
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