/usr/share/postgresql-common/pgdg/apt.postgresql.org.asc!= /usr/share/postgresql-common/pgdg/apt.postgresql.org.gpg E: The list of sources could not be read.
the file created:
/etc/apt/sources.list.d/pgdg.list:
deb [signed-by=/usr/share/postgresql-common/pgdg/apt.postgresql.org.asc]