Accidentally deleted source.list in wsl ubuntu while following some tutorial and now what ever i do i cant install anything on it, i tried to paste in a new copy of source.list as stated in this comment https://unix.stackexchange.com/a/458739
here is what i get when i use sudo apt-get update
`Get:1 http://download.opensuse.org/repositories/Ubuntu:/debbuild/Ubuntu_20.04 InRelease [1210 B]
Get:2 http://archive.ubuntu.com/ubuntu xenial InRelease [247 kB]
Get:3 http://security.ubuntu.com/ubuntu xenial-security InRelease [99.8 kB]
Err:2 http://archive.ubuntu.com/ubuntu xenial InReleaseThe following signatures couldn't be verified because the public key is not available:NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
Get:4 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [99.8 kB]
Err:4 http://archive.ubuntu.com/ubuntu xenial-updates InReleaseThe following signatures couldn't be verified because the public key is not available:
NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
Get:5 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [97.4 kB]
Err:3 http://security.ubuntu.com/ubuntu xenial-security InReleaseThe following signatures couldn't be verified because the public key is not available:
NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
Err:5 http://archive.ubuntu.com/ubuntu xenial-backports InReleaseThe following signatures couldn't be verified because the public key is not available:
NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
Hit:6 http://deb.playonlinux.com trusty InRelease
Reading package lists... Done
W: http://download.opensuse.org/repositories/Ubuntu:/debbuild/Ubuntu_20.04/InRelease: Keyis stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION sectionin apt-key(8) for details.
W: GPG error: http://archive.ubuntu.com/ubuntu xenial InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
E: The repository 'http://archive.ubuntu.com/ubuntu xenial 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: http://archive.ubuntu.com/ubuntu xenial-updates InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
E: The repository 'http://archive.ubuntu.com/ubuntu xenial-updates 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: http://security.ubuntu.com/ubuntu xenial-security InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
E: The repository 'http://security.ubuntu.com/ubuntu xenial-security 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: http://archive.ubuntu.com/ubuntu xenial-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
E: The repository 'http://archive.ubuntu.com/ubuntu xenial-backports 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: http://deb.playonlinux.com/dists/trusty/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.`