How To Add Public key on Ubuntu


Sometimes we can see an error from Ubuntu in regards of missing public key.
The following signatures couldn’t be verified because the public key is not available

We can fix this error by adding the key using following command

apt-key adv --keyserver --recv-keys 40976EAF437D05B5

apt-key adv --keyserver --recv-keys 3B4FE6ACC0B21F32

apt-key adv --keyserver --recv-keys 4F4EA0AAE5267A6C

Please replace the key the same with the error from the Ubuntu. Hope this simple method can fix the error.
Thank you..