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

Status: search-observed
Product: Azure Pipelines hosted Ubuntu
Last verified: 2026-06-25
Canonical HTML: https://gitdocs.org/fix/azure-pipelines-ubuntu-24-04-hosted-agent-nugetcommand-2-dotnet-cli-fails-restore-authentication
Machine JSON: https://gitdocs.org/api/fixes/azure-pipelines-ubuntu-24-04-hosted-agent-nugetcommand-2-dotnet-cli-fails-restore-authentication.json

## Exact Symptom

See the observed Codex queries below.

## Diagnosis

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

## Fix

```
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.
```

## Avoid

- 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.

## Observed Codex Queries

- 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

## Sources

- Azure Pipelines .NET on Ubuntu 24.04: https://learn.microsoft.com/en-us/azure/devops/pipelines/ecosystems/dotnet-core?view=azure-devops
- GitHub source file or repository reference: https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2404-Readme.md
- Official reference opened by Codex: https://learn.microsoft.com/en-us/azure/devops/pipelines/agents/hosted?view=azure-devops
- Official reference opened by Codex: https://learn.microsoft.com/en-us/azure/devops/pipelines/tasks/reference/nuget-command-v2?view=azure-pipelines