Hi all:

I decided to install the new ubuntu 17.10.

Everything went fine but now I got a error message from synaptic saying:

an error has occurred.Please open your package manager and right-clic, or try apt-get on terminal to see what's wrong.Error message is: error cache (E: malformed entry 52 in list file /etc/apt/sources list (component) E: the list of sources could not be read)

What can I do to solve this ??

and put a '#' at the left of line 52. Save ands close. Hit reload in synaptic.

Ok Followed instructions and message about line 52 is gone, but it still reports a problem:
Message error is: Brokencount>0 - this means tha installed packages have pendencies !!!!

what to do now ??

i think awesomemachine was a little too quick.
please copy-paste the output of these commands, including the commands themselves:
please use code tags for code.

$ cat /etc/apt/sources.list /etc/apt/sources.list.d/*

# deb cdrom:[Ubuntu 17.10 _Artful Aardvark_ - Release amd64 (20180105.1)]/ artful main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://pt.archive.ubuntu.com/ubuntu/ artful main restricted
# deb-src http://pt.archive.ubuntu.com/ubuntu/ artful main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://pt.archive.ubuntu.com/ubuntu/ artful-updates main restricted
# deb-src http://pt.archive.ubuntu.com/ubuntu/ artful-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://pt.archive.ubuntu.com/ubuntu/ artful universe
# deb-src http://pt.archive.ubuntu.com/ubuntu/ artful universe
deb http://pt.archive.ubuntu.com/ubuntu/ artful-updates universe
# deb-src http://pt.archive.ubuntu.com/ubuntu/ artful-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://pt.archive.ubuntu.com/ubuntu/ artful multiverse
# deb-src http://pt.archive.ubuntu.com/ubuntu/ artful multiverse
deb http://pt.archive.ubuntu.com/ubuntu/ artful-updates multiverse
# deb-src http://pt.archive.ubuntu.com/ubuntu/ artful-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://pt.archive.ubuntu.com/ubuntu/ artful-backports main restricted universe multiverse
# deb-src http://pt.archive.ubuntu.com/ubuntu/ artful-backports main restricted universe multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu artful partner
# deb-src http://archive.canonical.com/ubuntu artful partner

deb http://security.ubuntu.com/ubuntu artful-security main restricted
# deb-src http://security.ubuntu.com/ubuntu artful-security main restricted
deb http://security.ubuntu.com/ubuntu artful-security universe
# deb-src http://security.ubuntu.com/ubuntu artful-security universe
deb http://security.ubuntu.com/ubuntu artful-security multiverse
# deb-src http://security.ubuntu.com/ubuntu artful-security multiverse
# deb http:// ppa:ralf.hersel/rhersel-ppa
# deb-src http:// ppa:ralf.hersel/rhersel-ppa
deb http://ppa.launchpad.net/atareao/atareao/ubuntu artful main
# deb-src http://ppa.launchpad.net/atareao/atareao/ubuntu artful main
# deb-src http://ppa.launchpad.net/atareao/atareao/ubuntu artful main
deb http://ppa.launchpad.net/atareao/atareao/ubuntu artful main
# deb-src http://ppa.launchpad.net/atareao/atareao/ubuntu artful main
# deb-src http://ppa.launchpad.net/atareao/atareao/ubuntu artful main
### THIS FILE IS AUTOMATICALLY CONFIGURED ###
# You may comment out this entry, but any other modifications may be lost.
deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main
### THIS FILE IS AUTOMATICALLY CONFIGURED ###
# You may comment out this entry, but any other modifications may be lost.
deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main
deb http://ppa.launchpad.net/ralf.hersel/rhersel-ppa/ubuntu artful main
# deb-src http://ppa.launchpad.net/ralf.hersel/rhersel-ppa/ubuntu artful main
# deb-src http://ppa.launchpad.net/ralf.hersel/rhersel-ppa/ubuntu artful main
# deb-src http://ppa.launchpad.net/ralf.hersel/rhersel-ppa/ubuntu artful main
# deb-src http://ppa.launchpad.net/ralf.hersel/rhersel-ppa/ubuntu artful main
# deb-src http://ppa.launchpad.net/ralf.hersel/rhersel-ppa/ubuntu artful main
deb http://ppa.launchpad.net/ralf.hersel/rhersel-ppa/ubuntu artful main
# deb-src http://ppa.launchpad.net/ralf.hersel/rhersel-ppa/ubuntu artful main
# deb-src http://ppa.launchpad.net/ralf.hersel/rhersel-ppa/ubuntu artful main
# deb-src http://ppa.launchpad.net/ralf.hersel/rhersel-ppa/ubuntu artful main
# deb-src http://ppa.launchpad.net/ralf.hersel/rhersel-ppa/ubuntu artful main
# deb-src http://ppa.launchpad.net/ralf.hersel/rhersel-ppa/ubuntu artful main
deb https://wavebox.io/dl/client/repo/ x86_64/
deb https://wavebox.io/dl/client/repo/ x86_64/
deb https://wavebox.io/dl/client/repo/ x86_64/
deb https://wavebox.io/dl/client/repo/ x86_64/
deb http://ppa.launchpad.net/vala-team/ppa/ubuntu artful main
# deb-src http://ppa.launchpad.net/vala-team/ppa/ubuntu artful main
deb http://ppa.launchpad.net/vala-team/ppa/ubuntu artful main
# deb-src http://ppa.launchpad.net/vala-team/ppa/ubuntu artful main
deb http://ppa.launchpad.net/videolan/stable-daily/ubuntu artful main
# deb-src http://ppa.launchpad.net/videolan/stable-daily/ubuntu artful main
deb http://ppa.launchpad.net/videolan/stable-daily/ubuntu artful main
# deb-src http://ppa.launchpad.net/videolan/stable-daily/ubuntu artful main
deb http://ppa.launchpad.net/yg-jensge/gupnp/ubuntu artful main
# deb-src http://ppa.launchpad.net/yg-jensge/gupnp/ubuntu artful main
deb http://ppa.launchpad.net/yg-jensge/gupnp/ubuntu artful main
# deb-src http://ppa.launchpad.net/yg-jensge/gupnp/ubuntu artful main

hilario@hilario-desktop:~$ sudo apt-get update
[sudo] senha para hilario:
Atingido:1 http://pt.archive.ubuntu.com/ubuntu artful InRelease
Obter:2 http://pt.archive.ubuntu.com/ubuntu artful-updates InRelease [78,6 kB]
Obter:3 http://security.ubuntu.com/ubuntu artful-security InRelease [78,6 kB]
Atingido:4 http://ppa.launchpad.net/atareao/atareao/ubuntu artful InRelease
Obter:5 http://pt.archive.ubuntu.com/ubuntu artful-backports InRelease [72,2 kB]
Ign:6 http://dl.google.com/linux/chrome/deb stable InRelease
Ign:7 http://ppa.launchpad.net/ralf.hersel/rhersel-ppa/ubuntu artful InRelease
Obter:8 http://dl.google.com/linux/chrome/deb stable Release [1189 B]
Obter:9 http://ppa.launchpad.net/vala-team/ppa/ubuntu artful InRelease [20,7 kB]
Obter:10 http://dl.google.com/linux/chrome/deb stable Release.gpg [819 B]
Ign:11 http://ppa.launchpad.net/videolan/stable-daily/ubuntu artful InRelease
Ign:12 http://ppa.launchpad.net/yg-jensge/gupnp/ubuntu artful InRelease
Err:13 http://ppa.launchpad.net/ralf.hersel/rhersel-ppa/ubuntu artful Release
404 Not Found
Err:14 http://ppa.launchpad.net/videolan/stable-daily/ubuntu artful Release
404 Not Found
Err:15 http://ppa.launchpad.net/yg-jensge/gupnp/ubuntu artful Release
404 Not Found
Obter:17 http://pt.archive.ubuntu.com/ubuntu artful-updates/main i386 Packages [189 kB]
Obter:18 http://pt.archive.ubuntu.com/ubuntu artful-updates/main amd64 Packages [191 kB]
Obter:19 http://pt.archive.ubuntu.com/ubuntu artful-updates/main Translation-en [87,7 kB]
Obter:20 http://pt.archive.ubuntu.com/ubuntu artful-updates/main amd64 DEP-11 Metadata [83,3 kB]
Obter:21 http://pt.archive.ubuntu.com/ubuntu artful-updates/main DEP-11 64x64 Icons [54,1 kB]
Obter:22 http://pt.archive.ubuntu.com/ubuntu artful-updates/universe i386 Packages [76,8 kB]
Obter:23 http://pt.archive.ubuntu.com/ubuntu artful-updates/universe amd64 Packages [77,4 kB]
Obter:24 http://pt.archive.ubuntu.com/ubuntu artful-updates/universe Translation-en [44,6 kB]
Obter:25 http://pt.archive.ubuntu.com/ubuntu artful-updates/universe amd64 DEP-11 Metadata [49,5 kB]
Obter:26 http://pt.archive.ubuntu.com/ubuntu artful-updates/universe DEP-11 64x64 Icons [55,4 kB]
Obter:16 https://wavebox.pro/dl/client/repo x86_64/ InRelease [1759 B]
Obter:27 http://pt.archive.ubuntu.com/ubuntu artful-backports/universe amd64 DEP-11 Metadata [4696 B]
Obter:28 http://security.ubuntu.com/ubuntu artful-security/main amd64 Packages [90,5 kB]
Obter:29 http://security.ubuntu.com/ubuntu artful-security/main i386 Packages [88,8 kB]
Obter:30 http://security.ubuntu.com/ubuntu artful-security/main amd64 DEP-11 Metadata [2920 B]
Obter:31 http://security.ubuntu.com/ubuntu artful-security/universe i386 Packages [34,7 kB]
Obter:32 http://security.ubuntu.com/ubuntu artful-security/universe amd64 Packages [34,8 kB]
Obter:33 http://security.ubuntu.com/ubuntu artful-security/universe amd64 DEP-11 Metadata [10,4 kB]
Obter:34 http://security.ubuntu.com/ubuntu artful-security/universe DEP-11 64x64 Icons [10,2 kB]
Obter:35 http://dl.google.com/linux/chrome/deb stable/main amd64 Packages [1392 B]
Obter:36 http://ppa.launchpad.net/vala-team/ppa/ubuntu artful/main i386 Packages [2488 B]
Obter:37 http://ppa.launchpad.net/vala-team/ppa/ubuntu artful/main amd64 Packages [2492 B]
Obter:38 https://wavebox.pro/dl/client/repo x86_64/ Packages [2943 B]
A ler as listas de pacotes... Pronto
E: The repository 'http://ppa.launchpad.net/ralf.hersel/rhersel-ppa/ubuntu artful Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://ppa.launchpad.net/videolan/stable-daily/ubuntu artful Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://ppa.launchpad.net/yg-jensge/gupnp/ubuntu artful Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: Target Packages (Packages) is configured multiple times in /etc/apt/sources.list.d/repo.list:1 and /etc/apt/sources.list.d/repo.list:2
W: Target Translations (pt_PT) is configured multiple times in /etc/apt/sources.list.d/repo.list:1 and /etc/apt/sources.list.d/repo.list:2
W: Target Translations (pt) is configured multiple times in /etc/apt/sources.list.d/repo.list:1 and /etc/apt/sources.list.d/repo.list:2
W: Target Translations (pt_BR) is configured multiple times in /etc/apt/sources.list.d/repo.list:1 and /etc/apt/sources.list.d/repo.list:2
W: Target Translations (en) is configured multiple times in /etc/apt/sources.list.d/repo.list:1 and /etc/apt/sources.list.d/repo.list:2
W: Target Packages (Packages) is configured multiple times in /etc/apt/sources.list.d/repo.list:1 and /etc/apt/sources.list.d/repo.list:2
W: Target Translations (pt_PT) is configured multiple times in /etc/apt/sources.list.d/repo.list:1 and /etc/apt/sources.list.d/repo.list:2
W: Target Translations (pt) is configured multiple times in /etc/apt/sources.list.d/repo.list:1 and /etc/apt/sources.list.d/repo.list:2
W: Target Translations (pt_BR) is configured multiple times in /etc/apt/sources.list.d/repo.list:1 and /etc/apt/sources.list.d/repo.list:2
W: Target Translations (en) is configured multiple times in /etc/apt/sources.list.d/repo.list:1 and /etc/apt/sources.list.d/repo.list:2

hilario@hilario-desktop:~$ sudo apt-get -s upgrade
A ler as listas de pacotes... Pronto
A construir árvore de dependências
A ler a informação de estado... Pronto
Você pode querer executar 'apt --fix-broken install' para corrigir isso.
Os pacotes a seguir têm dependências não satisfeitas:
synaptic : Depende: libxapian22v5 mas não é instalável
E: Dependências não satisfeitas. Tente 'apt --fix-broken install' sem nenhum pacote (ou especifique uma solução).
hilario@hilario-desktop:~$

i think you need to repeat the apt-get commands like this:
or maybe:
and PLEASE use code tags for code. instructions in my signature.

~$ LC_ALL=C sudo apt-get update
[sudo] password for hilario:
Hit:1 http://pt.archive.ubuntu.com/ubuntu artful InRelease
Hit:2 http://pt.archive.ubuntu.com/ubuntu artful-updates InRelease
Hit:3 http://pt.archive.ubuntu.com/ubuntu artful-backports InRelease
Hit:4 http://ppa.launchpad.net/atareao/atareao/ubuntu artful InRelease
Hit:5 http://security.ubuntu.com/ubuntu artful-security InRelease
Ign:6 http://dl.google.com/linux/chrome/deb stable InRelease
Ign:7 http://ppa.launchpad.net/ralf.hersel/rhersel-ppa/ubuntu artful InRelease
Hit:8 http://dl.google.com/linux/chrome/deb stable Release
Hit:9 http://ppa.launchpad.net/vala-team/ppa/ubuntu artful InRelease
Ign:10 http://ppa.launchpad.net/videolan/stable-daily/ubuntu artful InRelease
Ign:11 http://ppa.launchpad.net/yg-jensge/gupnp/ubuntu artful InRelease
Err:12 http://ppa.launchpad.net/ralf.hersel/rhersel-ppa/ubuntu artful Release
404 Not Found
Err:13 http://ppa.launchpad.net/videolan/stable-daily/ubuntu artful Release
404 Not Found
Err:14 http://ppa.launchpad.net/yg-jensge/gupnp/ubuntu artful Release
404 Not Found
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/ralf.hersel/rhersel-ppa/ubuntu artful Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://ppa.launchpad.net/videolan/stable-daily/ubuntu artful Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://ppa.launchpad.net/yg-jensge/gupnp/ubuntu artful Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

hilario@hilario-desktop:~$ LC_ALL=C sudo apt-get -s upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
synaptic : Depends: libxapian22v5 but it is not installable
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).
hilario@hilario-desktop:~$


sorry I don't know what you mean by "code tags" !!!

Remove these three entries in /etc/apt/sources.list.
buntu 17.10 "Artful" is not supported in these repositories. Below is your sources.list, put a Hash where I put one in color RED.

dude hate to say it but i think you gotta re install

I had my sources.list file go corrupt on ubuntu 17.10 and I beat my head senseless trying to fix it.
also whos to say you dont have any other issues on your pc with it.

After posting at another forum someone adviced me to run this command:

sudo apt-get install -f

This was the solution. No more error messages.

Thank you both for your support.