Error when updating. Untrusted Software Sources?

[jrisreal]

I've been searching google for a couple weeks for this. I get this error every time I try to perform an update and also sometimes when I download certain applications. I went into the software sources and checked any option that looked like it could be the problem, but nothing has worked. When I was running 10.04 on my old laptop, I had the same problem, but eventually solved it...but it is not happening on this one. I am running 11.10 Unity 64-bit.

[jerrrys]

open a terminal and enter:

sudo apt-get update

and post any errors

[oldos2er]

The info you need is in that 'Details' button.

[jrisreal]

no it isn't. it just tells me which update is not trusted...

Here are any errors I found in the terminal:

Err http://ppa.launchpad.net oneiric/main Sources
404 Not Found
Err http://ppa.launchpad.net oneiric/main amd64 Packages
404 Not Found
Err http://ppa.launchpad.net oneiric/main i386 Packages
404 Not Found
W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY CBDFA02B432BB368
W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 87538FEDDF8063EB
W: Failed to fetch http://ppa.launchpad.net/stebbins/ha...source/Sources 404 Not Found

W: Failed to fetch http://ppa.launchpad.net/stebbins/ha...amd64/Packages 404 Not Found

W: Failed to fetch http://ppa.launchpad.net/stebbins/ha...-i386/Packages 404 Not Found

E: Some index files failed to download. They have been ignored, or old ones used instead.

And I attached a new screenshot with the details tab opened.

[oldos2er]

To fix the NO_PUBKEY errors, run

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys KEYID

where KEYID is the alphanumeric string shown in the error.

The stebbins PPA has no support for oneiric, so I'd remove it. Same with " http://ppa.launchpad.net", there's no PPA named oneiric at that URL.

[jrisreal]

To fix the NO_PUBKEY errors, run

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys KEYID

where KEYID is the alphanumeric string shown in the error.

The stebbins PPA has no support for oneiric, so I'd remove it. Same with " http://ppa.launchpad.net", there's no PPA named oneiric at that URL.

I forgot to mention that I don't know all that much about Linux...but anyway, I couldn't find a 'stebbins' PPA in my sources. And nearly every source starts with http://ppa.launchpadnet

[oldtimer7777]

I've been searching google for a couple weeks for this. I get this error every time I try to perform an update and also sometimes when I download certain applications. I went into the software sources and checked any option that looked like it could be the problem, but nothing has worked. When I was running 10.04 on my old laptop, I had the same problem, but eventually solved it...but it is not happening on this one. I am running 11.10 Unity 64-bit.

Use synaptic package manager instead to install packages.

sudo apt-get install synaptic
sudo synaptic

[oldos2er]

I forgot to mention that I don't know all that much about Linux...but anyway, I couldn't find a 'stebbins' PPA in my sources. And nearly every source starts with http://ppa.launchpadnet

PPAs are listed in /etc/apt/sources.list.d/
If you run gksu software-properties-gtk in a terminal, it should be in the 'Other Software' tab.

[jrisreal]

PPAs are listed in /etc/apt/sources.list.d/
If you run gksu software-properties-gtk in a terminal, it should be in the 'Other Software' tab.

Thank you. I guess it was there before, I just didn't see it.

But yeah I thought Synaptic came preinstalled with Ubuntu. It did in 10.04, why not now?

[oldos2er]

Synaptic was removed from 11.10's default installation to, if I'm not mistaken (and I could be) make room on the CD for other software; same as aptitude was removed from 11.04's default install.