Install. from packages are required which could not be trust

Hi,

I've installed Zorin OS 12.4 xenial, 4.15.0.29 - Generic and I get no further updates.
I get a dialog box with the message, that the installation need packages out of not signated sources.

I hope you can help me!

Greets
Stephan

Hi, You would only normally get this message if you installed 3rd party apps that are not on the repositories, such as Opera Browser. It does not mean that you won't get system or other application updates for the rest of the system, just the app that does not live on the repos.

Thanks, but I get no further system updates!
The message appears without the browser! - I get it by typing update in the field of search!

Could you please open the Software Updater and change your source to "main Server?"
You will get that warning if you re using a repository that is unsigned.
You may need to check your /etc/apt/sources.list to see if you have any unsigned repositories listed that you do not actually need.
If you do need them, you can use

Code:

[trusted=yes]

in your sources.list (I think...) or in terminal

Code:

sudo apt-get update --allow-insecure-repositories

to force installation.
Generally, it is discouraged to use unsigned repos, so please be sure to check the references on the repository that you are using.

I don't know how I can open the sources.list
I have open the terminal and I get this message after typing: sudo apt-get update --allow-insecure-repositories

Stephan72 wrote:I don't know how I can open the sources.list

There are a variety of ways.
You can use Nano in terminal. If you do not have nano you can install with terminal.

Code:

sudo apt-get install nano

Then,

Code:

sudo nano /etc/apt/sources.list

OR, if you prefer the GUI method;
In terminal,

Code:

sudo su

then

Code:

nautilus

This will open yoiur Nautilus file manager in Root or elevated privileges.
You can put /etc/apt/ in your pathbar and Enter or you can hit the UP arrow until you can go up no higher, then double click /etc folder then double click /apt folder and then double click your sources.list to open it in a text editor like Gedit.
OR you can look to the left pane view in Nautilus and see "File System" and click that to get to Root, then open /etc and open /apt folders.
So the method is entirely your choice.
Once you have opened the sources.list in a text editor you can adjust the document in the same manner that you would editing any document.

Stephan72 wrote:I have open the terminal and I get this message after typing: sudo apt-get update --allow-insecure-repositories

It appears that Opera Browser stable is your culprit in having the unsigned repository.

Ok, I've installed Nano and open it in the terminal.
After setting the command: sudo nano /etc/apt/sources.list

I get this in my terminal:



What can I do next to solve my problem?
Is the Solution to deinstall opera or can I fix it?

Stephan72 wrote:Ok, I've installed Nano and open it in the terminal.
After setting the command: sudo nano /etc/apt/sources.list

I get this in my terminal:

What can I do next to solve my problem?
Is the Solution to deinstall opera or can I fix it?

If it was me, I would remove the Opera repository and leave Opera installed. Opera and Chrome stable are often installed via .deb packages. You can update them manually or they may receive updates through the Ubuntu Main repo, though I am not certain on that one.
When you open the sources list in nano as above, you can scroll down to your Opera Repository information.
It should look like this:
deb-src [arch=amd64,i386] https://deb.opera.com/opera-stable/ stable non-free
Place a hashtag in front of it to look like this:
# deb-src [arch=amd64,i386] https://deb.opera.com/opera-stable/ stable non-free
This "comments" out the line instructing the computer to ignore that line.

Then, save and exit.
To do this, hit the keys ctrl and X
It will ask if you want to save
Hit Y
It will ask about the name- just hit ENTER to keep the name the same
It will then exit and your terminal window will go back to looking normal.

As you are using Education 12.3 you can refer to the Unofficial Manual for further guidance that I wrote from this link:

viewtopic.php?f=3&t=13614#p59536

I can't see the entrys about the opera in my sources.list.

The Hardcopy above is all in the souces.list.
There are no more entries!

And how can I remove the opera repository?

Stephan72 wrote:I can't see the entrys about the opera in my sources.list.

The Hardcopy above is all in the souces.list.
There are no more entries!

And how can I remove the opera repository?

Looking at the image you posted, I can see that. How odd.
Could you please do me a favor and scrolling up - see where I gave a GUI Method, as well. Use that method to go up and in and look at the Sources.list with a text editor and see if you see anything different.

I try the gui method and give the command: sudo su and then nautilus in the console.
Now i get a dialogue message, that the folder can't create. I have to create the folder manually in /root/.config/nautilus or change the access rights that nautilus can built it.
I can't open the root folder because I get a dialogue message that I haven't the access rights to show the content of it and I dont't know where I can change the access rights.

Stephan72 wrote:I try the gui method and give the command: sudo su and then nautilus in the console.
Now i get a dialogue message, that the folder can't create. I have to create the folder manually in /root/.config/nautilus but I can't!.
I can't open the root folder because I get a dialogue message that I haven't the access rights to show the content of it.

I think the instructions I gave must have been unclear.
Since you are using Zorin Core/Education, I figured you are using Nautilus File Manager.
Can you clarify what file manager you are using?
Instead of using sudo su which is "SuperUserDO SUperuser" can you try:

Code:

gksu nautilus

if you are using Nautilus
or

Code:

gksu thunar

if you are using thunar?
This should ask for your password, then after entering your password, it will open a GUI of File Manager with Root Privileges.

Could you please help me about the team viewer?
I'm newbie and need your help please!

Stephan72 wrote:Could you please help me about the team viewer?
I'm newbie and need your help please!

I do not have Team Viewer installed but if I can make a point: The best way to overcome being new to a system is practice.
I have every confidence that you can do it.
Pressing control and alt and the t keys simultaneously will open a terminal.
In the terminal, enter
gksu nautilus
Hit the enter key.
It will ask for a password, so enter your user password at the prompt.
A new window should then open with elevated privileges.

The command: gksu nautilus
has function in the terminal!

I see a private folder with the desktop in it

Stephan72 wrote:The command: gksu nautilus
has function in the terminal!

I see a private folder with the desktop in it

Ok, success.
Now, if you can give me a couple minutes to try to translate the German in your first screenshot, I'd like to see what is said about Opera Browser in it.

In the terminal I get a message:
(nautilus:5025): GLib-GIO-Critical **: g_dbus_interface_skeleton_unexport: assertion 'interface_-> priv->connections ! = NULL' failed

In terminal please enter:

Code:

wget https://deb.opera.com/archive.key

then hit the enter key
enter into terminal

Code:

sudo apt-key add archive.key

Hit the enter key.
Now update the above in your system by entering this into terminal

Code:

sudo apt-get update

*Corrected an error

I have do it!
No error messages! - All OK!

I try to update my system and it has function!

You are great! - Thanks for all and I wish you a nice day!

Stephan72 wrote:I have do it!
No error messages! - All OK!

What can I do next?

You should be fixed. Until your next question.