Sdk: Installation error on Ubuntu Server 14.04

[escamoteur]

Hi,

I tried to follow your installation instructions on https://www.microsoft.com/net/core#ubuntu

But I get the following error message:

sudo apt-get install dotnet-dev-1.0.0-preview3-003180
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies.
dotnet-dev-1.0.0-preview3-003180 : Depends: dotnet-sharedframework-microsoft.netcore.app-1.0.0 but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

Any idea?
Best
Thomas

[brthor]

Hi @escamoteur

Have you previously installed any of these packages?

Can you try installing dotnet-sharedframework-microsoft.netcore.app-1.0.0 directly?

[frogstack]

When I try to install dotnet-sharedframework-microsoft.netcore.app-1.0.0 directly, I get the following error:

 dotnet-sharedframework-microsoft.netcore.app-1.0.0 : Depends: libicu55 (>= 55.1-1~) but it is not installable
                                                      Depends: liblttng-ust0 (>= 2.5.0) but it is not going to be installed
                                                      Depends: libstdc++6 (>= 5.2) but 4.8.4-2ubuntu1~14.04.3 is to be installed
                                                      Depends: dotnet-hostfxr-1.0.1 but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

I've never installed any of these packages before. Attempting to install libicu55 directly fails with the following:

Package libicu55 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'libicu55' has no installation candidate

[brthor]

Thanks @frogstack, I try to get a repro here. This looks like perhaps the ubuntu 16.04 packages are on the 14 feed or the wrong feed got added to the machine.

Let me see what I find

[brthor]

@frogstack @escamoteur

I've just tried this out on ubuntu 14 and confirmed that it is working as expected.

What's weird here is that the shared framework you are installing @frogstack depends on libicu55, which is a dependency only of the ubuntu 16.04 packages.

Can you show the output of cat /etc/apt/sources.list.d/dotnetdev.list

[frogstack]

Sure, here it is:

> cat /etc/apt/sources.list.d/dotnetdev.list
deb [arch=amd64] https://apt-mo.trafficmanager.net/repos/dotnet-release/ xenial main
> 

I followed the instructions on this page for Ubuntu 14.04.

[brthor]

Indeed it looks like you have the ubuntu 16 feed added

Change
deb [arch=amd64] https://apt-mo.trafficmanager.net/repos/dotnet-release/ xenial main

to

deb [arch=amd64] https://apt-mo.trafficmanager.net/repos/dotnet-release/ trusty main

do apt-get update && apt-get purge dotnet-host dotnet-hostfxr-1.0.1 dotnet-sharedframework-microsoft.netcore.app-1.0.0

Then apt-get install dotnet-dev-1.0.0-preview2-003121

And you should be good to go.

[frogstack]

That looks like it's solved my problem! I must have copied the wrong set of commands accidentally. Thanks for your help!

[brthor]

no problem

/cc @blackdwarf For the confusion on the site.

Going to close this out for now

[kmute90]

i have the same error, but the suggested solution did not solve my problem :(

[blackdwarf]

@kmute90 can you share what steps did you do and what version you are trying to install?

[lukespice]

I am having the same problem today on Ubuntu Server 16.04. I was able to do a successful install yesterday on Ubuntu desktop 16.04

Fresh install of Ubuntu server 16.04 VM using VirtualBox
Followed the steps as outlined on https://www.microsoft.com/net/core#linuxubuntu
Got the following error message

The following packages have unmet dependencies:
 dotnet-dev-1.0.0-preview2-1-003177 : Depends: dotnet-sharedframework-microsoft.netcore.app-1.1.0 but it is not going to be installed

So I tried
sudo apt-get install dotnet-sharedframework-microsoft.netcore.app-1.1.0

The following packages have unmet dependencies:
 dotnet-sharedframework-microsoft.netcore.app-1.1.0 : Depends: libicu52 (>= 52~m1-1~) but it is not installable

Then I tried
sudo apt-get install libicu52

Package libicu52 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

I also tried the fix outlined above but got the same result.

[lukespice]

Ignore the above comment, I am a Linux rookie and I had enabled auto updates in my installation so I was actually running 16.10.

Thanks to http://shazwazza.com/post/installing-net-core-101-on-ubuntu-1610/ for pointing me in the right direction.