root@BlackRishi98:~# apt-get update
Get:1 sana InRelease [20.3 kB]
Err:1 sana InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY ED444FF07D8D0BF6
Get:2 kali-rolling InRelease [30.5 kB]
Err:2 kali-rolling InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY ED444FF07D8D0BF6
Reading package lists... Done
W: GPG error: sana InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY ED444FF07D8D0BF6
E: The repository ' sana InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: kali-rolling InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY ED444FF07D8D0BF6
E: The repository ' kali-rolling InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.A few days back, I tried to install TheFatRat, a Kali Linux application. Thereafter I started getting these errors. I cannot even install any new packages.
Any help is appreciated.
11 Answer
It would appear that you added the Kali Linux Repository to your list of repositories to install that package, yet you did not add the repository's public key to your local keyring. Thus, Ubuntu cannot verify the authenticity of the repository.
The following commands should fix this problem:
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys ED444FF07D8D0BF6
sudo apt update
