Update problem NO_PUBKEY / keyserver receive failed: No data

I tried to make a update / upgrade for Ubuntu 18.04. but the system blocks because of outdated pubkey

( The following signatures couldn't be verified because the public key is not available: NO_PUBKEY D409AC6D65FE6664)

I found some solutions but i cant setup it

root@server ~ # apt-key adv --keyserver keyserver.ubuntu.com --recv-keys D409AC6D65FE6664
Executing: /tmp/apt-key-gpghome.JmsnAed5a6/gpg.1.sh --keyserver keyserver.ubuntu.com --recv-keys D409AC6D65FE6664
gpg: keyserver receive failed: No data
root@server ~ # apt-key adv --keyserver hkp://keys.gnupg.net:80 --recv-keys D409AC6D65FE6664
Executing: /tmp/ --keyserver hkp://keys.gnupg.net:80 --recv-keys D409AC6D65FE6664
gpg: keyserver receive failed: No name
root@server ~ # sudo apt-key adv --recv-keys --keyserver hkp://p80.pool.sks-keyservers.net:80 D409AC6D65FE6664
Executing: /tmp/apt-key-gpghome.2jxhY74gvK/gpg.1.sh --recv-keys --keyserver hkp://p80.pool.sks-keyservers.net:80 D409AC6D65FE6664
gpg: keyserver receive failed: No name

What can i do, there are some other solutions or fixes for that? I think the pubkey is outdated or something, there are not at the keyserver, dont know what to do, normaly the programs do this by it self

1 Answer

liveconfig

sudo su in the terminal then

wget -O - | sudo apt-key add -
apt update