Ubuntu: How to install mono on ubuntu 64-bit v14.04?


So i've been having a play using MS Azure through Ubuntu, but in order to manage my Azure Server, it's asked me to install Silverlight which has then directed me to install Mono.

I've downloaded Mono but the Archive Manager won't open it.

Reading around, i'm guessing this is because i'm running a 64bit system, and I gather that to get Mono running in 64-bit, it needs installing through code.

I'm super new to both Ubuntu and Unix...Please can anyone help advise what code to paste into a terminal session in order to get Mono installed so that I can get back to Azure :-)

Greatly appreciate any help.

Cheers Jon


To install mono

sudo apt-get install mono-complete  

Silverlight is not available on Linux, but you can try alternatives such as Pipelight http://www.webupd8.org/2013/08/pipelight-use-silverlight-in-your-linux.html


Installing Mono if your are behind a proxy or a firewall When :

  1. Ports are blocked (keyserver.ubuntu.com:11371)
  2. When you are not able to add a signing key

Add Signing Key using

    wget "http://keyserver.ubuntu.com/pks/lookup?op=get&search=0x3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF" -O out && sudo apt-key add out && rm out  

Add Repository

    echo "deb http://download.mono-project.com/repo/debian wheezy main" | sudo tee /etc/apt/sources.list.d/mono-xamarin.list    

Update repolist

sudo apt-get update      

Install Mono (using the package names in bold)

The package mono-devel should be installed to compile code.

The package mono-complete should be installed to install everything - this should cover most cases of “assembly not found” errors.

The package referenceassemblies-pcl should be installed for PCL compilation support - this will resolve most cases of “Framework not installed: .NETPortable” errors during software compilation.



sudo apt-get install mono-complete does in fact install mono in most cases as expected. But if you only install mono-complete without first adding Mono Project GPG signing key and the package repository (and updating the repolist) you are in a great danger to be using the old and obsolete versions of TLS/SSL algorithms among other potentially harmful pieces of code, at least for now.

If you want to use mono more safely you should follow the instructions described in mono-project.com install page or a similar one.


  sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF  echo "deb http://download.mono-project.com/repo/debian wheezy main" | sudo tee /etc/apt/sources.list.d/mono-xamarin.list  sudo apt-get update  sudo apt-get install mono-complete  

Mono JIT compiler version 4.2.1 -> 4.4.2


  apt-get -y update && \    apt-get -y install \    wget \    tar \    git \    autoconf \    libtool \    automake \    build-essential \    mono-devel \    gettext  wget http://download.mono-project.com/sources/mono/mono- -O mono-  tar xvf mono-  cd "mono-4.6.0/"  ./configure  make  make install  

Mono JIT compiler version 4.2.1 -> You can find the other stable versions out there on the same page also.

Background information

Testing done with the mono .Net implementation using ubuntu 16.04 and 14.04 (with docker).

Install only mono-complete:

  • Does not reject connections if server certificate is expired.

Do as instructed in the "Example1" or "Example2" -section

  • Reject connections if server certificate is expired.
  • More safe

I know this because i used trytls to test mono against badssl and other TLS/SSL testing-backends using C#-Net, F#-Net and VB-Net.


sudo apt-get install mono-xsp4

Works for me (first try sudo apt-get install mono-complete, but it still not working, then sudo apt-get install mono-xsp4 and works).

Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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