sudo apt update
Err:1 http://apt.opscode.com onereic InRelease
403 Forbidden [IP: 13.33.244.65 80]
Hit:2 http://kg.archive.ubuntu.com/ubuntu bionic InRelease
Get:3 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]
Hit:4 http://archive.canonical.com/ubuntu bionic InRelease
Get:5 http://kg.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
Get:6 http://kg.archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
Reading package lists... Done
E: Failed to fetch http://apt.opscode.com/dists/onereic/InRelease 403 Forbidden [IP: 13.33.244.65 80]
E: The repository 'http://apt.opscode.com onereic InRelease' is not signed.
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.
In this case you need to remove old repository file with
sudo rm /etc/apt/sources.list.d/opscode.list
and then run
sudo apt update
again.