Azure Patch Manager Error Code (100) - Ubuntu 24.04 LTS

Question

While testing the capability's of Azure Arc for on-prem servers using 24.04 LTS I'm receiving the below.

The machine show connected inside azure arc -> machine name. However when attempting to use the updates -> Check for updates the error below is generating in azure.

Assessment failed due to this reason: Assessment completed with 1 errors

Unexpected return code (100) from package manager on command: LANG=en_US.UTF8 sudo apt-get -s dist-upgrade -oDir::Etc::Sourcelist=/var/lib/waagent/Microsoft.SoftwareUpdateManagement.LinuxOsUpdateExtension-1.0.45.0/tmp/msft-aumc-security-patches-1d6d5e68-8f77-488b-9b23-d5f3ea923a45.list and output: E: Type 'URIs:' is not known on line 1 in source list /var/lib/waagent/Microsoft.SoftwareUpdateManagement.LinuxOsUpdateExtension-1.0.45.0/tmp/msft-aumc-security-patches-1d6d5e68-8f77-488b-9b23-d5f3ea923a45.list

E: The list of sources could not be read.

E: Type 'URIs:' is not known on line 1 in source list /var/lib/waagent/Microsoft.SoftwareUpdateManagement.LinuxOsUpdateExtension-1.0.45.0/tmp/msft-aumc-security-patches-1d6d5e68-8f77-488b-9b23-d5f3ea923a45.list

E: The list of sources could not be read.

The file location of /var/lib/waagent/Microsoft.SoftwareUpdateManagement.LinuxOsUpdateExtension-1.0.45.0/tmp/msft-aumc-security-patches-1d6d5e68-8f77-488b-9b23-d5f3ea923a45.list does not exist on any Ubuntu Linux Sytems.

However servers running 22.04.5 LTS using same enrollment file are functional. File /var/lib/waagent/Microsoft.SoftwareUpdateManagement.LinuxOsUpdateExtension-1.0.45.0/tmp/msft-aumc-security-patches-1d6d5e68-8f77-488b-9b23-d5f3ea923a45.list does not exist here either.

Answer 1

This file contains the following just before being deleted by the update check itself:

URIs: http://security.ubuntu.com/ubuntu
Suites: noble-security

1. This format should not have the .list extension but .sources according to https://repolib.readthedocs.io/en/latest/deb822-format.html
2. It's missing the Types element
3. It's missing the Components element