First, I'm going to calm down. Second, the error says the following:
E: The method driver /usr/lib/apt/methods/https could not be found.
N: Is the package apt-transport-https installed?
We have to verify if the package apt-transport-https is installed, this is done by means of the following command:
apt-get install apt-transport-https
What it gives us as a result:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
apt-transport-https
0 upgraded, 1 newly installed, 0 to remove and 36 not upgraded.
Need to get 171 kB of archives.
After this operation, 243 kB of additional disk space will be used.
Get:1 http://mirrors.*************.com/debian stretch/main amd64 apt-transport-https amd64 1.4.8 [171 kB]
Fetched 171 kB in 0s (10.0 MB/s)
Selecting previously unselected package apt-transport-https.
(Reading database ... 108493 files and directories currently installed.)
Preparing to unpack .../apt-transport-https_1.4.8_amd64.deb ...
Unpacking apt-transport-https (1.4.8) ...
Setting up apt-transport-https (1.4.8) ...
Yes, indeed, that package was not installed, so now let's try again:
sudo apt-get update
And we have the magic!
Get:10 https://packages.microsoft.com/debian/9/prod stretch/main amd64 Packages [29.7 kB]
Fetched 32.6 kB in 0s (33.5 kB/s)
Reading package lists... Done
The excitement of seeing that everything keeps moving forward!
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
aspnetcore-runtime-2.1 dotnet-host dotnet-hostfxr-2.1 dotnet-runtime-2.1
dotnet-runtime-deps-2.1 liblttng-ust-ctl2 liblttng-ust0 liburcu4
The following NEW packages will be installed:
aspnetcore-runtime-2.1 dotnet-host dotnet-hostfxr-2.1 dotnet-runtime-2.1
dotnet-runtime-deps-2.1 dotnet-sdk-2.1 liblttng-ust-ctl2 liblttng-ust0
liburcu4
0 upgraded, 9 newly installed, 0 to remove and 36 not upgraded.
Need to get 131 MB of archives.
After this operation, 379 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
And after a while we have:
Welcome to .NET Core!
---------------------
Learn more about .NET Core: https://aka.ms/dotnet-docs
Use 'dotnet --help' to see available commands or visit: https://aka.ms/dotnet-cli-docs
Telemetry
---------
The .NET Core tools collect usage data in order to help us improve your experience. The data is anonymous and doesn't include command-line arguments. The data is collected by Microsoft and shared with the community. You can opt-out of telemetry by setting the DOTNET_CLI_TELEMETRY_OPTOUT environment variable to '1' or 'true' using your favorite shell.
Read more about .NET Core CLI Tools telemetry: https://aka.ms/dotnet-cli-telemetry
Configuring...
--------------
A command is running to populate your local package cache to improve restore speed and enable offline access. This command takes up to one minute to complete and only runs once.
Processing triggers for libc-bin (2.24-11+deb9u3) ...
And in case of doubt, we check again with the command:
dotnet --info
Now yes, with all the power 2.0!
.NET Core SDK (reflecting any global.json):
Version: 2.1.500
Commit: b68b931422
Runtime Environment:
OS Name: debian
OS Version: 9
OS Platform: Linux
RID: debian.9-x64
Base Path: /usr/share/dotnet/sdk/2.1.500/
Host (useful for support):
Version: 2.1.6
Commit: 3f4f8eebd8
.NET Core SDKs installed:
2.1.500 [/usr/share/dotnet/sdk]
.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.1.6 [/usr/share/dotnet/shared/Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.6 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.1.6 [/usr/share/dotnet/shared/Microsoft.NETCore.App]
To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-download
Now all in order, may the force be with you: D