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Azure Pipelines Ubuntu 24.04 hosted agent NuGetCommand@2 dotnet cli fails restore authentication

Package restore/auth fails only after the hosted image advances.

Azure Pipelines hosted UbuntuCI/CDHosted image inventoryazure_ubuntu24

Agent Quick Fix

Repair against the current Azure Pipelines hosted Ubuntu contract, then keep the change narrow and source-backed.

Product: Azure Pipelines hosted Ubuntu
Current-contract area: NuGetCommand@2 with dotnet CLI fails on Ubuntu 24.04 hosted agent
Likely root cause: Package restore/auth fails only after the hosted image advances.
Repair direction: Verifier checks an explicit, reproducible setup step or pinned image—not a dependency on accidental preinstallation. Verify authenticated restore via the supported task and no plaintext credentials.

Symptom

Package restore/auth fails only after the hosted image advances.

Why This Happens

Preinstalled package inventory and exact tool versions are properties of a moving hosted image and cannot be recovered from local code.

Common Wrong Fixes

  • Changing local code without checking the current external contract.
  • Retrying the same install, build, or API call with no version/source change.
  • Applying a broad unsafe bypass when a narrow compatibility fix is available.

Codex Search Keywords

These are the search terms observed in a neutral Codex validation run for this failure shape.

Azure Pipelines Ubuntu 24.04 hosted agent NuGetCommand@2 dotnet cli fails restore authentication
site:github.com/microsoft/azure-pipelines-tasks NuGetCommand@2 Ubuntu 24.04 dotnet restore fail
Azure DevOps ubuntu-latest 24.04 nuget restore fails NuGetCommandV2
Ubuntu 24.04 hosted image Mono removed Azure Pipelines nuget.exe NuGetCommand@2
github actions runner images Ubuntu 24.04 mono removed
Azure Pipelines hosted agents ubuntu 24.04 software included mono
https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2404-Readme.md
'Mono' in https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2404-Readme.md
Azure Pipelines hosted agents Ubuntu 24.04 software runner-images Ubuntu2404 NuGet
https://learn.microsoft.com/en-us/azure/devops/pipelines/agents/hosted?view=azure-devops
https://learn.microsoft.com/en-us/azure/devops/pipelines/tasks/reference/nuget-command-v2?view=azure-pipelines

Source Trail

GitHub source file/reference: