updating kali linux error

[kivince]

when i try to update my Linux, i get key error messages,Like the one below,i have tried following many peoples advice but got no help.

 

Ign:12 http://ppa.launchpad.net/webupd8team/y-ppa-manager/ubuntu lucid/main amd64 Packages
Hit:12 http://ppa.launchpad.net/webupd8team/y-ppa-manager/ubuntu lucid/main amd64 Packages
Fetched 14.8 kB in 4s (3,076 B/s)
Reading package lists... Done
W: GPG error: http://download.opensuse.org/repositories/home:/colomboem/Debian_8.0 Release: The following signatures were invalid: EXPKEYSIG E3757B8E0D988D6E home:colomboem OBS Project <home:colomboem@build.opensuse.org> 1A2E38D61775C3963A039A87E3757B8E0D988D6E
W: The repository 'http://download.opensuse.org/repositories/home:/colomboem/Debian_8.0  Release' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http://ppa.launchpad.net/dhor/myway/ubuntu lucid Release: The following signatures were invalid: B7A8ED84DF6AFA37B620BFB2E2B7D64D93330B78
W: The repository 'http://ppa.launchpad.net/dhor/myway/ubuntu lucid Release' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http://ppa.launchpad.net/webupd8team/y-ppa-manager/ubuntu lucid Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY C2518248EEA14886
W: The repository 'http://ppa.launchpad.net/webupd8team/y-ppa-manager/ubuntu lucid Release' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.

 

[tikker]

You can try adding they keys manually:

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys < add keys here >

or you can try something like this (from this thread):

cd /var/lib/apt
sudo mv lists lists.old
sudo mkdir -p lists/partial
sudo apt-get update

 

Edit: you might need to change the keyserver, I plucked it from the Ubuntu forums but looking at the log you posted this may need to be keyserver.opensuse.org instead.