Hello sirs,

I have that error:

what is that?

it did on terminal when i was trying that code commands:

i have also such problem on trying to check updates on software manager:

Please help me.

There may be a repo issue, but it may only be your local cache. Try this

I think you have broken packages. Try:
If you don't have aptitude (you should have it on debian tho) you can install it with:
If that does not fix the problem I would try disabling one by one my repos in sources.list so I find the problematic one. Then I would try and change the mirror if possible to see if this is the issue. If that doesn't help you can wait a day or two and if the issue is still there then I guess you would have to get feedback from someone more experienced. Good luck!

1 members found this post helpful.

Reboot and try again.
Post your sources.lst

Where's the "detailed report" mentioned?

"A package dependency could not be found."

I can only imagine.

It looks like you have no Internet connection.

Someone else here had exactly this same fetch failure problem yesterday, except they were trying to access the Deepin repos.

They solved the problem by rebooting their router. Worth a shot.

Agreed.

"Network is unreachable" seems like a sure bet:-

Let's see what the src's list shows:-

@THE PHANTOM:

What is the output of:

The message is saying that your computer cannot reach the server specified for that repo. It can be a few things:
- you are not connected to a network. Can you ping your gateway IP address? Can you ping ftp.debian.org?
- If you are behing a proxy, have you created apt.conf file specifying your proxy info?
- there is a problem with the repo server. You can try switching to another repo server to see if you can download from it.
- Maybe a typo in your lines for the sources.list?

that is my source list:

i tried that codes: but output was that:

I also tried to ping my gateway and ftp.debian.org and both with successfully pinged.

Are there any files under /etc/apt/preferences.d ?

there was nothing on output:

Also, as I study your sources.list closer, I can see you have entries for Jessie and stable, which are not the same versions of Debian. jessie is version 8, and stable is version 9. This needs to be corrected. Do you have Debian 8 or Debian 9 installed?

Please post the output of:
Edit:
It sounds like you probably have Jessie. But when Debian Stretch became "stable" and Debian Jessie became "oldstable" you started having issues with that mismatch. This is why i don't use stable in my sources.list and instead the name, wheezy, jesse, etc...

that is detailed report:

all reports cannot post here for limitation : The text that you have entered is too long (61946 characters). Please shorten it to 30000 characters long.