Synaptic Package Manager problems

[asteroth]

Hello, I was trying to access Synaptic Package Manager and I got this.

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E: Malformed entry 1 in list file /etc/apt/sources.list.d/additional-repositories.list (Component)
E: The list of sources could not be read.
Go to the repository dialog to correct the problem.
E: _cache->open() failed, please report.

What should I do? I'm certain this has come before but I just not seeing it.

[Larry78723]

Please post the results of the following command

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inxi -r

[asteroth]

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Repos:     Active apt sources in file: /etc/apt/sources.list.d/additional-repositories.list
           deb https://dl.winehq.org/wine-builds/ubuntu/bionic main
           deb http://packages.domain.com/ xenial main
           Active apt sources in file: /etc/apt/sources.list.d/official-package-repositories.list
           deb http://packages.linuxmint.com sylvia main upstream import backport #id:linuxmint_main
           deb http://archive.ubuntu.com/ubuntu xenial main restricted universe multiverse
           deb http://archive.ubuntu.com/ubuntu xenial-updates main restricted universe multiverse
           deb http://archive.ubuntu.com/ubuntu xenial-backports main restricted universe multiverse
           deb http://security.ubuntu.com/ubuntu/ xenial-security main restricted universe multiverse
           deb http://archive.canonical.com/ubuntu/ xenial partner

[Larry78723]

Go into Software Sources --> Additional Repositories and uncheck the packages.domain.com entry then try again.

[asteroth]

Okay. I did that and I got the same. But I noticed a wine repository and unchecked it. And tried again which went through. With both unchecked.

[Larry78723]

That would have been the next step. I don't use wine but if I remember correctly it's now installed via the terminal using

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 sudo apt install wine-installer

[asteroth]

Okay. Should I do anything else? Also I would like to try using crossover(?) but is says its missing a dendency? Or should I put that question elsewhere?

[Larry78723]

I'm not familiar with it. Someone else will have to help you with that.

[asteroth]

Thank you.

[karlchen]

Okay. I did that and I got the same. But I noticed a wine repository and unchecked it. And tried again which went through. With both unchecked.

The error message about incorrect line 1 was caused by a missing space character before bionic in line 1.
Wrong: deb https://dl.winehq.org/wine-builds/ubuntu/bionic main
Right: deb https://dl.winehq.org/wine-builds/ubuntu/ bionic main
As you disabled the incorrect line 1, the initial error message disappeared of course.

In addition bionic is very likely incorrect for your system, because the other entries all reference sylvia/xenial.
--
By the way:
Larry78723's advice to disable or remove the line 2, deb http://packages.domain.com/ xenial main, had been correct.
The line was syntactically correct, but the server address was a dummy address.
--
Brief summary: Good that both lines have been disabled.
--

About installing Wine or Crossover:
Yes, please, open a new thread.
By the way: wine-installer was introduced in Mint 19, so it is not available on Mint 18.3 sylvia, yet.

[asteroth]

How does one go about removing or changes those?

[karlchen]

How does one go about removing or changes those?

I do not quite understand the question, because according to your own post above, you have disabled both offending entries using Software Sources.
As you are able to disable entries in Software Sources, you should be able to remove them as well, using Software Sources.

[asteroth]

Ah. Sorry. Thank you again.