Correct Snap alias and symlink commands for .NET 10 SDK on Ubuntu 24.04.3

[Copilot]

On Ubuntu 24.04.3, the documented .NET 10 Snap recovery commands were incorrect: the alias target used a non-existent app name, and the symlink path omitted usr/bin. This update adjusts the troubleshooting commands so they match the current dotnet-sdk-100 Snap layout.

• Troubleshooting: dotnet command alias

  • Updated the .NET 9+ alias command to target the package command that exists in dotnet-sdk-100.

• Troubleshooting: SDK resolution via symlink

  • Updated the .NET 9+ symlink source path to point to the actual dotnet binary location under the Snap mount.

# .NET 9+
sudo snap alias dotnet-sdk-100 dotnet
ln -s /snap/dotnet-sdk-100/current/usr/bin/dotnet /usr/local/bin/dotnet

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Internal previews

📄 File	🔗 Preview link
docs/core/install/linux-snap-sdk.md	docs/core/install/linux-snap-sdk

[adegeo]

@copilot there is more that needs to change here (use the editor agent):

1. .NET SDK 8 was republished as a standalone snap package, just like 9 and 10. Remove all references to the old "8 and prior" and the package dotnet-sdk specifying a channel. The instructions are now the same from 8 (lowest version currently supported) to the latest.
2. Alias is no longer applied. The main way to map the dotnet command is to use the link specified in the troubleshooting area. Promote that troubleshooting information into the procedure step and remove it from the troubleshooting area.
3. The DOTNET_ROOT path is /snap/dotnet-sdk-100/current/usr/lib/dotnet where 100 is the version of the SDK.
4. In all examples use the latest, which is dotnet-sdk-100 but when appropriate mention that this is the version of the SDK you want to install, and the latest SDK supports targeting lower runtimes.

[Copilot]

@copilot there is more that needs to change here (use the editor agent):

1. .NET SDK 8 was republished as a standalone snap package, just like 9 and 10. Remove all references to the old "8 and prio...

Addressed in commit 208f8b06.

Updated linux-snap-sdk.md to:

• Use version-specific Snap packages for .NET 8, 9, and 10 (dotnet-sdk-80/90/100) and remove old dotnet-sdk --channel guidance.
• Promote dotnet command mapping into the main procedure, remove alias guidance from troubleshooting, and keep troubleshooting focused on verification steps.
• Update DOTNET_ROOT to /snap/dotnet-sdk-100/current/usr/lib/dotnet with version substitution guidance.
• Use dotnet-sdk-100 in examples and clarify that latest SDK can target lower runtimes.

[Copilot]

Pull request overview

This PR updates the Snap-based .NET SDK install and troubleshooting guidance to better match the current dotnet-sdk-100 layout on Ubuntu 24.04.3, including the symlink target for the dotnet binary and revised install/setup steps.

Changes:

• Updates the install guidance to focus on version-specific Snap identifiers (for example, dotnet-sdk-100) and refreshes the package table.
• Moves “dotnet command mapping” into the main flow via a symlink to /snap/.../usr/bin/dotnet, and updates DOTNET_ROOT to /snap/.../usr/lib/dotnet.
• Simplifies troubleshooting by removing the dedicated “dotnet terminal command doesn’t work” alias section and pointing users back to the main setup steps.

[BillWagner]

This LGTM. I did have one question that readers might have.

[BillWagner]

This LGTM. Let's