Error in update time elementry os

Question

Err:12 http://apt.postgresql.org/pub/repos/apt YOUR_UBUNTU_VERSION_HERE-pgdg Release 404 Not Found [IP: "myip"]

E: The repository 'http://apt.postgresql.org/pub/repos/apt YOUR_UBUNTU_VERSION_HERE-pgdg Release' does not have a Release file.

N: Updating from such a repository can't be done securely, and is therefore disabled by default.

N: See apt-secure(8) manpage for

repository creation and user configuration details.

Answer 1

You have somehow added PPA's without changing the text YOUR_UBUNTU_VERSION_HERE-pgdg. remove that lines and add bionic instead. Or complete remove them from the sourcelist.

You can find the file on postgresql in /etc/apt/sources.list.d and delete/edit it.

Answer 2

try this guide, probably it's what your looking for.