Install .NET Core in Amazon Linux 2 using yum

Have you tried the following:

sudo yum update 
sudo yum install dotnet-sdk-2.2

Also this link might help: https://dotnet.microsoft.com/download/linux-package-manager/centos/sdk-current

The following works for .NET Core 3.1 on Amazon Linux 2:

sudo rpm -Uvh https://packages.microsoft.com/config/centos/7/packages-microsoft-prod.rpm
sudo yum install dotnet-sdk-3.1

(or dotnet-sdk-5.0 for .NET 5)

More detail here: https://docs.microsoft.com/en-us/dotnet/core/install/linux-centos#centos-7-

If you're using AWS Elastic Beanstalk, and you only need the runtime (not the SDK) then you can just use the .NET Core / Linux platform.

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