I am getting an error whenever I am running this command-
curl -fsSL https://deb.nodesource.com/setup_lts.x | sudo -E bash -
And here is the full error log:--
## Installing the NodeSource Node.js 16.x repo...
Populating apt-get cache...
- apt-get update
Ign:1 cdrom://Ubuntu 20.04.3 LTS Focal Fossa - Release amd64 (20210819) focal InRelease
Err:2 cdrom://Ubuntu 20.04.3 LTS Focal Fossa - Release amd64 (20210819) focal Release
Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
Err:16 http://download.opensuse.org/repositories/Ubuntu:/debbuild/Ubuntu_20.04 InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 08CF86BF009AAE2E
Reading package lists... Done
E: The repository 'cdrom://Ubuntu 20.04.3 LTS Focal Fossa - Release amd64 (20210819) focal Release' does not have a Release file.
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: http://download.opensuse.org/repositories/Ubuntu:/debbuild/Ubuntu_20.04 InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 08CF86BF009AAE2E
E: The repository 'http://download.opensuse.org/repositories/Ubuntu:/debbuild/Ubuntu_20.04 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.
Error executing command, exiting
How can i solve this issue? Its urgent, please someone help me out as I am a noob to ubuntu.
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv 08CF86BF009AAE2E. – N0rbert Feb 05 '22 at 06:34