CODEWITHSUNDEEP
ubuntu.net-core
nicolaas
nicolaas

Reputation: 1871

How to install multiple versions of .NET Core side by side on ubuntu

We have an app, written in .NET Core rc2 running on an acceptance environment (linux server). Recently our client ran their own performance tests, which turned out to completely break the application. We couldn't reproduce it ourselves for several reasons:

  1. We develop on windows
  2. We have since migrated from rc2 to 1.0.0.

On windows, we couldn't reproduce in either our new version (1.0.0) or rc2. So we tried to reproduce it on a linux machine. on 1.0.0 we couldn't reproduce their results either, but when we tried to actually test against rc2 (an older version of our app, obviously) we ran into a really annoying problem: I don't seem to be able to install 1.0.0 and rc2 side by side, even though the error message implies it's possible. Below is the error message

The specified framework 'Microsoft.NETCore.App', version '1.0.0-rc2-3002702' was not found.
  - Check application dependencies and target a framework version installed at:
      /usr/share/dotnet/shared/Microsoft.NETCore.App
  - The following versions are installed:
      1.0.0
  - Alternatively, install the framework version '1.0.0-rc2-3002702'.

Basically, we want to be able to check the version currently running on acceptance of our app (rc2) on a linux machine, but we are struggling with actually getting rc2 on it.

Thanks. If anything is unclear, post your question in the comments.

EDIT: I tried building it as a standalone deployment, but then I get the following error:

Errors in /home/nicolaas/Projects/digipolis-survey-engine/Digipolis.FormEngine/Digipolis.FormEngine.Response.API/project.json
    System.AppContext 4.1.0-rc2-24027 provides a compile-time reference assembly for System.AppContext on .NETCoreApp,Version=v1.0, but there is no run-time assembly compatible with ubuntu.15.10-x64.
    System.Runtime.InteropServices.RuntimeInformation 4.0.0-rc2-24027 provides a compile-time reference assembly for System.Runtime.InteropServices.RuntimeInformation on .NETCoreApp,Version=v1.0, but there is no run-time assembly compatible with ubuntu.15.10-x64.
    One or more packages are incompatible with .NETCoreApp,Version=v1.0 (ubuntu.15.10-x64).

This is to be expected as rc2 is actually not installed on the machine, and I want to build it on the linux machine

Upvotes: 45

Views: 53815

Answers (7)

Jeremy L
Jeremy L

Reputation: 11

download the dotnet 7 to : ~/dotnet7

just do the following, you will succeed, No thanks.

cp -r ~/dotnet7/shared/Microsoft.AspNetCore.App/7.0.19 /usr/lib/dotnet/shared/Microsoft.AspNetCore.App

cp -r ~/dotnet7/shared/Microsoft.NETCore.App/7.0.19 /usr/lib/dotnet/shared/Microsoft.NETCore.App

cp -r ~/dotnet7/sdk/7.0.409/ /usr/lib/dotnet/sdk

Upvotes: 1

Yan Oreshchenkov
Yan Oreshchenkov

Reputation: 253

  1. Install latest sdk with packet manager sudo apt install dotnet
  2. Find your sdk installation folder. For me it's /usr/lib/dotnet To do that you can check the output of whereis dotnet for example.
  3. Download other SDKs you need from Microsoft web site
  4. Unpack them one by one and copy folders sdk and shared from unpacked archive into /usr/lib/dotnet/.... So it should looks like
~$ ls /usr/lib/dotnet/sdk
6.0.415  7.0.112  8.0.100-rc.1.23463.5
  1. Check the result dotnet sdk check. You will see something like
~$ dotnet sdk check
.NET SDKs:
Version                   Status                                  
------------------------------------------------------------------
6.0.415                   Up to date.                             
7.0.112                   Up to date.                             
8.0.100-rc.1.23463.5      Patch 8.0.100-rc.2.23502.2 is available.

Try out the newest .NET SDK features with .NET 8.0.100-rc.2.23502.2.

.NET Runtimes:
Name                          Version                  Status                                
---------------------------------------------------------------------------------------------
Microsoft.AspNetCore.App      6.0.23                   Up to date.                           
Microsoft.NETCore.App         6.0.23                   Up to date.                           
Microsoft.AspNetCore.App      7.0.12                   Up to date.                           
Microsoft.NETCore.App         7.0.12                   Up to date.                           
Microsoft.NETCore.App         8.0.0-rc.1.23419.4       Patch 8.0.0-rc.2.23479.6 is available.
Microsoft.AspNetCore.App      8.0.0-rc.1.23421.29      Patch 8.0.0-rc.2.23479.6 is available.

Enjoy!

Upvotes: 3

Afshar
Afshar

Reputation: 11483

I have .Net 6 installed on my Ubuntu 22.04 and needed .Net 5 to be installed side-by-side. After downloading .Net 5 SDK, I uncompressed the downloaded file and tried to put it in the path just like 'Mohammad HS Farvashani. solution.

But the path did not work. I mean calling dotnet -v was showing 6 everywhere. Additionally, dotnet --list-sdks just showed 6.

My work-around was to call the dotnet 5 from its installation directory only. Just like this:

~/dotnet5/dotnet run

It helped me to run a .Net 5 application and it was enough for my purpose.

Consider that before it getting to run I encountered error

No usable version of libssl was found

This error resolved by running:

wget http://archive.ubuntu.com/ubuntu/pool/main/o/openssl1.0/libssl1.0.0_1.0.2n-1ubuntu5.9_amd64.deb
sudo dpkg -i libssl1.0.0_1.0.2n-1ubuntu5.9_amd64.deb

from this answer.

Upvotes: 2

Christopher Scott
Christopher Scott

Reputation: 3126

Based on Mohammad's answer (which worked well), here is a more complete example installing dotnet 5 and 3.1 side by side:

env DOTNET_ROOT=/usr/share/dotnet
env PATH=$PATH:usr/share/dotnet
env DOTNET_SDK_VERSION=5.0.401
env DOTNET_SDK_VERSION2=3.1.413
   
curl -SL --output dotnet.tar.gz https://dotnetcli.azureedge.net/dotnet/Sdk/$DOTNET_SDK_VERSION/dotnet-sdk-$DOTNET_SDK_VERSION-linux-x64.tar.gz \
    && dotnet_sha512='a444d44007709ceb68d8f72dec0531e17f85f800efc0007ace4fa66ba27f095066930e6c6defcd2f85cdedea2fec25e163f5da461c1c2b8563e5cd7cb47091e0' \
    && echo "$dotnet_sha512  dotnet.tar.gz" | sha512sum -c - \
    && mkdir -p /usr/share/dotnet \
    && tar -zxf dotnet.tar.gz -C /usr/share/dotnet \
    && rm dotnet.tar.gz \
    #&& ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet \
    # Trigger first run experience by running arbitrary cmd
    && dotnet help

curl -SL --output dotnet.tar.gz https://dotnetcli.azureedge.net/dotnet/Sdk/3.1.413/dotnet-sdk-3.1.413-linux-x64.tar.gz \
    && dotnet_sha512='2a0824f11aba0b79d3f9a36af0395649bc9b4137e61b240a48dccb671df0a5b8c2086054f8e495430b7ed6c344bb3f27ac3dfda5967d863718a6dadeca951a83' \
    && echo "$dotnet_sha512  dotnet.tar.gz" | sha512sum -c - \
    #&& mkdir -p /usr/share/dotnet31 \
    && tar -ozxf dotnet.tar.gz -C /usr/share/dotnet \
    && rm dotnet.tar.gz \
    #&& ln -s /usr/share/dotnet31/dotnet /usr/bin/dotnet31 \
    # Trigger first run experience by running arbitrary cmd
    && dotnet help

Upvotes: 0

Mohammad HS Farvashani
Mohammad HS Farvashani

Reputation: 655

Download the tar.gz package from https://dotnet.microsoft.com/download/dotnet and install the package with this command:

mkdir -p $HOME/dotnet && tar zxf dotnet-sdk-6.0.100-preview.3.21202.5-linux-x64.tar.gz -C $HOME/dotnet
export DOTNET_ROOT=$HOME/dotnet
export PATH=$PATH:$HOME/dotnet

the scound version will be added to sdks folder and you can confirm the installation by running:

dotnet --list-sdks

I have found all the other solutions useless and hard to utilize and dotnet-install script is just very hard to use and pointless.

Upvotes: 19

Giovanni Bassi
Giovanni Bassi

Reputation: 839

Simply use the dotnet install script: https://learn.microsoft.com/en-us/dotnet/core/tools/dotnet-install-script

This is a good tutorial: https://www.hanselman.com/blog/SideBySideUserScopedNETCoreInstallationsOnLinuxWithDotnetinstallsh.aspx

Upvotes: 14

Eric Roller
Eric Roller

Reputation: 437

This has been working for us.

  1. Installing multiple versions of dotnet runtime to separate directories.

  2. For the latest runtime installation, add symlinks for each of the older runtimes. For example, for older runtime 1.1.2 we create the symlink /path/to/dotnet-latest/shared/Microsoft.NETCore.App/1.1.2 --> /path/to/dotnet-1.1.2/shared/Microsoft.NETCore.App/1.1.2

  3. Run dotnet from the latest runtime installation and it should pick up the appropriate runtime.

Note that this is equivalent to what happens with the Windows installer. The new runtime is added to the shared installation. A similar approach can be used to get support for multiple sdks from a single installation by adding the appropriate symlinks in the sdk subdirectory.

Upvotes: 4

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