"Original" command https://www.postgresql.org/download/linux/ubuntu/
wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | \ sudo apt-key add - sudo apt-get update
And the example below is taken from here: https://docs.docker.com/engine/examples/postgresql_service/#installing-postgresql-on-docker
# Add the PostgreSQL PGP key to verify their Debian packages. # It should be the same key as https://www.postgresql.org/media/keys/ACCC4CF8.asc RUN apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys B97B0AFCAA1A47F044F244A07FCC7D46ACCC4CF8
I have understood that this is about gpg. I am looking at the output of man gpg. But can't understand this example.
I can't catch from where did they take:
Could you help me here?