I am unable to update Deepin as I keep getting the following message when I perform a sudo apt-get update command:
:/$ sudo apt-get update
Hit:1
https://repo.skype.com/deb unstable InRelease
Get:2
http://security.ubuntu.com/ubuntu trusty-security InRelease [65.9 kB]
Hit:3
http://packages.deepin.com/deepin lion InRelease
Hit:4
https://repo.nordvpn.com/deb/nordvpn/debian stable InRelease
Ign:2
http://security.ubuntu.com/ubuntu trusty-security InRelease
Fetched 65.9 kB in 1s (61.7 kB/s)
Reading package lists... Done
W: GPG error:
http://security.ubuntu.com/ubuntu trusty-security InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
W: The repository 'http://security.ubuntu.com/ubuntu trusty-security InRelease' 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.
I've been using various linux versions for sometime and I've only had Deepin for a month, but I've not run into this problem before. I've tried several "fixes" but can't seem to get it to work. Thoughts?
MJH
