• Ubuntu 16.04
• Mono 4.6.1
• Git 2.7.4
• KDiff3 0.9.98
• GitExtensions 2.49RC2

1. Install git: sudo apt install git
   check git: git --version
   

2. Install mergetool kdiff3: sudo apt install kdiff3
   check Kdiff3: kdiff3 --version
   

3. Install Mono to run GitExtensions. Version should be 5.14 or above)
   Add repository to install the latest version of Mono
   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 update
   install: sudo apt install mono-complete
   check: mono --version
   

4. Install GitExtensions
   Download GitExtensions-2.51.05-Mono.zip from GitExtensions v2.51.05 release for Linux.
   Unzip to any folder

5. ❗ Delete .\Plugins\BitBucket.dll

6. Start GitExtensions
   Open GitExtensions folder and double click GitExtensions.exe
   If error occurred, then open terminal and execute the following command. sh gitext.sh when you first start you will see a language selection
   

7. Configuring GitExtensions
   
   1. and 2. Your name and email
   3. Editor default GitExtensions
   4. kdiff3
   5. /usr/bin/kdiff3
   7. and 8. as 4. and 5.
   9. Whatever you prefer
   10. Unicode (UTF-8)
   

DONE

The Windows page may have more information: see Build Instructions with Mono

• Run \Setup\BuildInstallers.Mono.cmd

Mono 4.4.0 or later is required, because it uses C# 4.6.1 compiler by default. Refer to Git Extensions on Linux for details on how to build and debug on Linux.

Not all image formats are supported on Mono. PNG images with a color depth of 48 bpp will cause compiler errors. If you run into this problem you should convert all PNG images to 8 bpp.

This can be done using the following Linux commands:

sudo apt-get install imagemagick
mogrify -depth 8 $(find -iname '*.png')
mogrify -depth 8 $(find -iname '*.PNG')

Tests use NUnit under Mono.

• openSUSE: http://software.opensuse.org/package/GitExtensions
  • which is currently fed by https://build.opensuse.org/package/show/home:codeminister/GitExtensions.

Currently more broken than version 2.5 under mono.

• Debian bookworm
• winehq-stable 9.0.0.0-bookworm-1
• wine_git v0.3.0
• GitExtensions-Portable-x64-5.1.1.17970-939c0edba

install git kdiff3

install wine

You need later version than in what is in debian stable (It is not possible to install .net runtime version required by Git Extensions in old wine version)
Either add winehq repository using instructions from www.winehq.org (worked for me)
and then install it
sudo apt-get install winehq-stable
Or update your distribution to Debian testing (not tested, should work as there is the same wine version I tried)

download https://github.com/monoblaine/wine_git

in settings.ini update path_to_wine_git_folder to your path

in worker.sh update path_to_wine_git_folder

make worker.sh executable

download gitExtensions

run gitExtensions

wine GitExtensions.exe

it will complain about missing runtime and opens link to download it in your browser

Download it and then run it in wine:

wine windowsdesktop-runtime-8.0.12-win-x64.exe

note: installing .NET 8 runtime using winetricks doesn't work for me

run gitExtensions

wine GitExtensions.exe

Set location of git executable to wine_git.exe (You can navigate to it through Z: drive)

macOS Mono support for Git Extensions is unknown.

Note specifically though that you at least in 5.4 must run tMono in 32bit version as the 64bit WinForm support is incomplete. Start with --arch=32. http://www.mono-project.com/docs/about-mono/supported-platforms/osx/