broken apt update due to change of sources.list

Question

pi@raspberrypi:~ $ sudo apt update
Get 1http://archive.raspberrypi.org/debian buster InRelease [32.6 kB]      
Get:2 http://raspbian.raspberrypi.org/raspbian buster InRelease [15.0 kB]                                                                   
Get:4 http://archive.raspberrypi.org/debian buster/main armhf Packages [330 kB] 
Hit:3 https://packagecloud.io/headmelted/codebuilds/debian stretch InRelease                             
Ign:5 https://packagecloud.io/rabbitmq/rabbitmq-server/raspbian buster InRelease                                  
Get:6 http://raspbian.raspberrypi.org/raspbian buster/main armhf Packages [13.0 MB]                               
Err:7 https://packagecloud.io/rabbitmq/rabbitmq-server/raspbian buster Release                                   404  Not Found [IP: 54.183.113.236 443] 
Reading package lists... Done                                                                                                                                 
E: The repository 'https://packagecloud.io/rabbitmq/rabbitmq-server/raspbian buster 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.

I was trying to update packages and found that there is an error caused by the Rabbit MQ which I installed earlier.

I still remember that I was following some instruction to modify sources.list or sources.list.d or maybe other file to add RabbitMQ's url, but I forget where it is.

I opened the /etc/aptsources.list and there isn't the rabbitmq url.

How can I find where and what file is the string 'https://packagecloud.io/rabbitmq/rabbitmq-server/raspbian buster Release' located?

Answer 1

See if you have the file /etc/apt/sources.list.d/bintray.rabbitmq.list Or /etc/apt/sources.list.d/bintray.erlang.list and if so move them out.

Then run sudo apt update

If I remember correctly, you have a couple of goes at different installers with Erlang...

You can track your previous questions by looking at your profile here in your case.

Note the above MAY WELL be wrong as I'm not sure how you got everything installed first and hence the move not delete recommendation.