how to replace apt-key for webmin

Solution 1:

For some reason the key wasn't imported correctly, you can always check by listing all currently imported keys by executing :

apt-key list 

And searching for 1719 003A CE3E 5A41 E2DE 70DF D97A 3AE9 11F6 3C51

If it's missing try importing the key from ubuntu keyserver by running :

    sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys D97A3AE911F63C51 

the output sould be something like :

Executing: /tmp/apt-key-gpghome.neTpxcHlMl/gpg.1.sh --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys D97A3AE911F63C51
gpg: key D97A3AE911F63C51: public key ..... imported
gpg: Total number processed: 1
gpg:               imported: 1

Again Check if it's imported correctly apt-key list.

Finally :

sudo apt update 
sudo apt install webmin

this should work.