This is one I might be able to help with since I had this same problem not long ago.  Here's part of that first error that was in your post.

iTarget Packages (main/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list.d/additional-repositories.list:1 and /etc/apt/sources.list.d/google-chrome.list:3

According to the line above,  iTarget Packages (main/binary-amd64/Packages)is listed in /etc/apt/sources.list.d/additional-repositories.list and in /etc/apt/sources.list.d/google-chrome.list.  It should only be in one file.

When I had this problem come up, I edited one of the files mentioned in the error messages, and saved the file.  I did the same for the other items it said were in there in multiple files.  When I was done I ran sudo apt-get update.

Can anyone else tell me and Michael if there's anything important I missed?

I get the following errors while updating:

[code]W: Target Packages (main/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list.d/additional-repositories.list:1 and /etc/apt/sources.list.d/google-chrome.list:3
W: Target Packages (main/binary-all/Packages) is configured multiple times in /etc/apt/sources.list.d/additional-repositories.list:1 and /etc/apt/sources.list.d/google-chrome.list:3
W: Target Translations (main/i18n/Translation-en_US) is configured multiple times in /etc/apt/sources.list.d/additional-repositories.list:1 and /etc/apt/sources.list.d/google-chrome.list:3
W: Target Translations (main/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list.d/additional-repositories.list:1 and /etc/apt/sources.list.d/google-chrome.list:3
W: Target DEP-11 (main/dep11/Components-amd64.yml) is configured multiple times in /etc/apt/sources.list.d/additional-repositories.list:1 and /etc/apt/sources.list.d/google-chrome.list:3
W: Target DEP-11 (main/dep11/Components-all.yml) is configured multiple times in /etc/apt/sources.list.d/additional-repositories.list:1 and /etc/apt/sources.list.d/google-chrome.list:3
W: Target CNF (main/cnf/Commands-amd64) is configured multiple times in /etc/apt/sources.list.d/additional-repositories.list:1 and /etc/apt/sources.list.d/google-chrome.list:3
W: Target CNF (main/cnf/Commands-all) is configured multiple times in /etc/apt/sources.list.d/additional-repositories.list:1 and /etc/apt/sources.list.d/google-chrome.list:3[/code]

Is there an easy way to fix this or will I have to go into the individual files and find the multiple configuration? Will I have to edit them with visudo or something like that?

--

:-)~MIKE~(-:

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