Problems when i like to run update

mistey

Hello at all,

i am getting an error when i want to search for updates, with the command "sudo aptitude update" it says:

1. W: GPG error: http://http.debian.net wheezy-backports Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8B48AD6246925553 NO_PUBKEY 7638D0442B90D010
   
2. W: Failed to fetch http://raspberrypi.collabora.com/dists/wheezy/rpi/binary-armhf/Packages: 403  Forbidden [IP: 2a00:1098:0:82:1000:25:2eeb:e3e2 80]
   
3. E: Some index files failed to download. They have been ignored, or old ones used instead.
   
4. E: Couldn't rebuild package cache
   

Copy the Code

My /etc/apt/sources looks like this:

1. deb http://mirrordirector.raspbian.org/raspbian/ wheezy main contrib non-free rpi
   

Copy the Code

anything i need to change? Something is getting wrong on my system?

Thanks in advance!