NO_PUBKEY B188E2B695BD4743

Sometimes you may see this error “The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY B188E2B695BD4743”

You can solve this issue by running the following commands.

apt-key adv --keyserver ha.pool.sks-keyservers.net --recv-keys B188E2B695BD4743
# apt-get update