Questions tagged [mono]

Mono is an open source project aimed at bringing .NET compatible technology to the open source world. This technology includes a C# compiler and the Common Language Runtime.

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23 votes
5 answers
32k views

Why do my bluetooth Sony stero headphones only play in mono?

I'm new to Linux, so I hope I'll be giving you helpful info here. On my last (recently deceased) laptop, I was running Ubuntu 14.04, and on that system my bluetooth Sony MDR-ZX770BT stereo headphones ...
66 votes
6 answers
345k views

Mono Package for Wine is not installed

Wine is saying that Mono package is not installed, but I installed it with Terminal by: sudo apt-get install mono-complete What should I do?
2 votes
1 answer
662 views

binfmt-detector-cli from mono-runtime does not recognize x64 executables?

On 64-bit Ubuntu 14.04.2 LTS, I can apparently run "x86" exe files, but not "x64" ones. If I use monodevelop to build the x86 configuration of a project, resulting in x86/test.exe, I can run it with ....
1 vote
0 answers
137 views

How do I install 32-bit Mono in Ubuntu 20.04

I have a Windows app that requires a 32-bit runtime to execute with Mono. I have installed Mono 5.x (a requirement, it can't use 6.x or later) from archive.org using these commands: sudo apt install ...
34 votes
4 answers
79k views

How do I refresh the icon cache?

First of all, I'm not 100% positive that the main question I've written here is actually the problem, but I have a hunch that it is. I've wrote a simple Gtk# application in Mono awhile ago, and gave ...
1 vote
1 answer
213 views

How to downgrade mono from 6.x to 5.x or 4.x?

After upgrading Ubuntu 18.04 to 22.04 (passing through 20.04) an old web application with an ASMX web service (so with Mono ) won't work anymore. I tried a lot of things , but neither works. Mono ...
1 vote
0 answers
64 views

Printing using a non-mono font and using texttopdf

Well, what's in this article it is written about changing the standard printing font to some other, but for some reason only mono font. And the question arises whether it is possible to do it with a ...
0 votes
0 answers
316 views

Error with mono while updating ubuntu 20.04

I'm kindly asking for your help. I'm trying to update with sudo apt update on Ubuntu 20.04, but I get this error message: E: The repository 'https://download.mono-project.com/repo/ubuntu stable-focal/...
1 vote
2 answers
6k views

Cannot execute programs from MonoDevelop

I clicked on "Run a console project" and it said that the program was built successfully. But after that, I click "Run a console project" again and error like Cannot execute /path/file.exe appears as ...
0 votes
0 answers
64 views

Run Mono Application on Startup with a Service

When the ubuntu system boots up, my service that starts test.exe fails (using systemctl status Testprog.service): at System.Windows.Forms.XplatUIX11..ctor () at System.Windows.Forms.XplatUIX11....
0 votes
1 answer
7k views

Cannot import GPG keys via apt-key

I'm trying to install mono on my Ubuntu 20.04 server. I followed the official install instructions about Mono on Download When executing: sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --...
0 votes
0 answers
179 views

MonoDevelop failed to start on Ubuntu 22.04 LTS

After starting: $ monodevelop --no-redirect Linux 5.19.0-35-generic #36~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Fri Feb 17 15:17:25 UTC 2 x86_64 FATAL ERROR [2023-03-04 18:02:26Z]: MonoDevelop failed to ...
10 votes
1 answer
2k views

Change appearance of a MONO application

I would like to theme an application that uses the mono framework. I have tried various GTK2/3 "solutions" but these haven't changed anything. just two examples I've tried: env GTK_THEME="...
1 vote
0 answers
303 views

Can I play warcraft 3 cinematics in game? focal

I'm using Ubuntu 20.04 (Focal) . Is there any way to play warcraft 3 cinematics in game? My version is Warcraft 3 Complete v1.25 (chaos+frozen). I don't use Lutris. The game works well after ...
2 votes
1 answer
514 views

Installed dotnet6 package with Jammy but the Windows application is still asking for Mono

I am trying to run SDRPlay2RSS.exe with wine. This is a piece of software based on the .NET framework, belonging to radiotelescope software for the Radio Jove project. I first tried installing wine ...
1 vote
2 answers
524 views

N: Skipping acquisition of configured file 'main/binary-i386/Packages', ... 'https://download.mono-project.com/repo/ubuntu stable-focal InRelease'

Full Error N: Skipping acquisition of configured file 'main/binary-i386/Packages', as repository 'https://download.mono-project.com/repo/ubuntu stable-focal InRelease' doesn't support architecture '...
1 vote
0 answers
1k views

Download, unzip and run a file from GitHub

I'm absolutely new to Linux and I would like to know how could I download through the command line a .zip file from GitHub releases e.g. https://github.com/username/repo/releases/download/ver/file.zip ...
1 vote
3 answers
2k views

error on install Community Server/ Document server onlyoffice

when try to install only office server based on there Installing Community Server for Debian, Ubuntu and derivatives so step by step until the latest command sudo apt-get install onlyoffice-...
5 votes
3 answers
29k views

I have a windows app which requires .NET 3.5. Can wine handle .NET 3.5?

I don't know/understand much about this, but I believe mono is an open-source alternative to .NET... But whatever its actual niche is, I really don't know the best way to go about trying to get my ...
2 votes
0 answers
2k views

Wine mono is not installed

I'm encountering an issue ive seen questions about, however none of the solutions actually work for me. Someone said to open an uninstaller msi(?) to install, however i cant open msi files on linux so ...
10 votes
8 answers
12k views

Mono broken after attempt to upgrade, unable to use apt

I have had mono-complete and mono-devel installed on my Ubuntu Server 18.10 for a couple months now to run some applications that depend on it. I am using Mono 5.18.0.225. Prior to things breaking, I ...
0 votes
0 answers
195 views

mono-run prevents reconfiguration of packages on Ubuntu 22.04 [duplicate]

Recently I had to reinstall Ubuntu. After returning to Ubuntu 22.04 I restored my /usr/local/ and var folders which caused huge mess in terms of packages being written as installed although when one ...
2 votes
0 answers
1k views

Enable Mono Audio output in Ubuntu 22.04lts

I would like to enable mono audio output through my earphone;this was possible previously in ubuntu 20.04(vanilla) with these instructions: Can I downmix stereo audio to mono? However,it doesn't seem ...
0 votes
3 answers
14k views

Bluetooth headset only plays sound in mono

My brand new JBL Bluetooth headset only plays sound in mono. Resetting Bluetooth in an attempt to fix it doesn't help - all Bluetooth services go off and the headset is no longer in the list of sound ...
12 votes
4 answers
47k views

How can I compile, run and decompile C# code in Ubuntu terminal?

I have a C# code which I need to compile, execute and decompile using the terminal. How can I do so?
3 votes
1 answer
2k views

Tried to install mono. Now apt is broken [duplicate]

I tried to install mono for Ubuntu 20.04. I used these commands. sudo apt install gnupg ca-certificates sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys ...
12 votes
4 answers
15k views

How to install Monodevelop in 20.04 and get it to build something?

I am trying to setup a development machine using 20.04 and am having problems with the Monodevelop environment. Whenever I create a solution and project it seems that it cannot find the proper build ...
0 votes
1 answer
40 views

Unable to open a file using a custom program that has been added to 'open with' list

This is essentially a windows program for editing subtitles. I've been using another program called mono to run it. The program itself runs fine. I then created a .desktop file that looks like this. [...
0 votes
0 answers
190 views

Package system broken after installing mono [duplicate]

I was trying to install the latest version of mono... but now somehow my package manager is broken with the error: Error: Broken Count > 0. When I try to install any package using the software ...
3 votes
1 answer
421 views

How to delete all packages from a repository and then delete the repository and then delete the signing key?

I'm running Ubuntu 21.10. I made a mistake and downloaded Mono that's supposed to be used on a older version and now it's giving me error messages like: Sub-process /usr/bin/dpkg/ returned an error ...
6 votes
1 answer
13k views

How to develop for Android with Xamarin?

I want to develop applications for Android in C#. On Windows I tried Xamarin Studio and I was very happy with it. Is there a way to use Xamarin on Ubuntu? I noticed there are Xamarin.Android binaries ...
3 votes
1 answer
1k views

Ubuntu 12.04: Installing MonoDevelop “broken packages”/“unmet dependencies” error [duplicate]

I am very new to Linux, so please forgive me if the answer to my question is obvious. Since I am running an ARM device and can't install wine, I am trying to install Mono/Develop. The problem is, ...
6 votes
1 answer
3k views

Is it possible to force all audio to mono?

I am deaf in one ear and want Ubuntu to mix both left and right audio channels to mono audio. There is an Accessibility Setting for this in Windows, but I cannot find one in Ubuntu. The only Hearing ...
1 vote
1 answer
1k views

problem with installing photoshop

I've tried install photoshop cc in ubuntu 20.04 but I got some error in my terminal. First I wanted to install via wine but I got this: "The following packages have unmet dependencies: winehq-...
1 vote
0 answers
60 views

apt held packages, can't install package [duplicate]

On Ubuntu 12.10 when trying sudo apt-get install mono-complete to install mono, I get: enter codReading package lists... Done Building dependency tree Reading state information... Done Some ...
0 votes
0 answers
1k views

Gecko is not installed for Wine 7.0.0

(Note: a previous version of this question was overly verbose and didn't get to the point. I have completely rewritten it.) On January 7 2022 (~3 weeks ago), I installed Wine following the WineHQ ...
15 votes
3 answers
24k views

error: parsing file '/var/lib/dpkg/updates/0001' near line 0: newline in field name `#padding'

I was try to install mono using the following command: sudo apt-get install mono-* I closed the terminal while it was installing. I restarted the install, and I got the error message: Could not get ...
1 vote
0 answers
203 views

Ubuntu very slow - mono command

I have Ubuntu 20.04 and very often it is very slow. Using TOP during these slow times I notice command "mono" is taking 80%-100% of the CPU. What is the mono command, do I need it, and how ...
0 votes
0 answers
1k views

Ubuntu 18.04 cannot install mono

(I've examined the seemingly similar questions I can find and get to know it's not a duplicate.. Error message: Err:1 https://download.mono-project.com/repo/ubuntu stable-bionic/main amd64 libmono-...
16 votes
3 answers
11k views

What is this mono process running at startup?

I'm running Lubuntu 14.04. I'm a little concerned about the following Mono process that runs at startup, though it seems to be inactive. The command used to start this process was : /usr/bin/mono /...
2 votes
1 answer
1k views

Why does Pinta crash immediately after opening an image on Ubuntu 20.04?

When opening pinta on the command line the app quickly crashes after opening an image and complains about a call to free() erroring out before doing a full memory dump.
6 votes
2 answers
12k views

Can I reset my Wine install?

I think I borked my Wine install. Is there a way I can "start fresh", so to speak--completely uninstall everything Wine-related and start over?
2 votes
1 answer
1k views

How to redirect the output from desktop-entry

I have a program called prg.exe written in C#. I want to run this program in mono with an argument (arg1) and redirect the output to a log file called log.txt. If I open a terminal and enter the ...
57 votes
5 answers
87k views

Is knowledge of C# of any use in a Linux system?

I know C# and I like to switch between systems and use Linux. Can I use C# to build applications that will natively work on Linux? What should I do to make use of my knowledge of C# in a Linux system? ...
1 vote
0 answers
319 views

How to solve: Skipping acquire of configured file 'main/binary-i386/Packages' for mono-project? [duplicate]

whenever i try to run sudo apt update, i get this error: N: Skipping acquire of configured file 'main/binary-i386/Packages' as repository 'https://download.mono-project.com/repo/ubuntu stable-focal ...
1 vote
2 answers
16k views

The assembly mscorlib.dll was not found or could not be loaded

I wanted to run my software on a VPS, however, when I try to run it with mono, it says The assembly mscorlib.dll was not found or could not be loaded.It should have been installed in the '/usr/local/...
0 votes
1 answer
313 views

How to run Mono on Ubuntu 18.04?

I have installed mono from Terminal. How am I going to run it?
-1 votes
1 answer
723 views

Unable to install Wine - list of sources could not be read

I tried to get Wine (because I saw that I can't use .exe files in Ubuntu) but I didn't know about sudo add-others... I randomly walked to some kind of Mono. I entered it and it didn't continue for ...
0 votes
1 answer
686 views

Can't install mono [duplicate]

I'm currently stuck and cannot install mono-devel on my PC. I've installed the mono keyring and repo, but whenever I try to install it I get this: Some packages could not be installed. This may mean ...
1 vote
1 answer
2k views

Ubuntu 20.04 Mono CSC Compile Not Working

I receive an error when compiling "hello.cs": using System; public class HelloWorld { public static void Main(string[] args) { Console.WriteLine ("Hello World!"); ...

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