What's the fix for this error ?

[Brendon]

I have a Debain OS and I am getting the following error
GPG error: Index of / stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E9C74FEEA2098A6E

How to fix this ?

[stuartb4u]

Hello,

Waiting for a dotdeb-keyring package, you just have to get the key and add it to your trusted keys’ keyring :

You can try the following commands on shell with root login::

#gpg --keyserver keys.gnupg.net --recv-key 89DF5277
#gpg -a --export 89DF5277 | sudo apt-key add -


This should fix the issue for you.