You can simply create a symbolic link like so:

$ whereis libdl.so.2
libdl.so.2: /usr/lib/libdl.so.2 /usr/lib32/libdl.so.2
$ sudo ln -s /usr/lib/libdl.so.2 /usr/lib/libdl.so
$ sudo ln -s /usr/lib32/libdl.so.2 /usr/lib32/libdl.so

In my case that's enough for MonoGame.

TL;DR: This is a building issue with the application, the application was incorrectly built and linked against libdl.so. For Linux support, the software must be rebuilt and linked to libdl.so.2 instead.

In this specific stack trace, the crash is in the C# pythonnet stack, fixed in pythonnet >= 3.0

More Explanation:

This is the standard glibc library. It's often linked automatically when binaries are created or it's often hardcoded in specific builds (the library is used to load further libraries).

The library is libdl.so.2 in Linux distributions (Debian, RHEL, Ubuntu, etc...). It was historically libdl.so in older operating systems and Unix variants.

Both have been coexisting for a while and causing confusion:

• On CentOS, libdl.so can be installed by sudo yum install glibc-devel
• On Debian and Ubuntu <=20, libdl.so can be installed by sudo apt-get install libc6-dev
• On Ubuntu >= 22, libdl.so no longer exists, it can't be installed by libc6-dev (nor gcc).

The dev glibc package is a transitive dependency of gcc. It's very common for gcc to be installed on Linux machines (developer machines and end-user machines alike), so it's very common for libdl.so to be accidentally available. It's not part of the base operating system and should not be expected to be available.

Software that have been linked to libdl.so will crash when the library is not available. It's a long standing issue. It's getting more noticeable due to Ubuntu 22 lately, it was only noticeable in containers and minimal OS install before (no gcc).

In this specific stack trace, the crash was in the C# pythonnet stack, the linking was fixed in pythonnet >= 3.0

I also ran into this on 64bit ubuntu, gcc 4.6.3, my hunch was the ordering of link lib. However, the same thing builds on 32bit. I added -ldl at the end of the link command and it linked, so looks like some sort of linker issue. You can also set env var: LIBS=-ldl, from shell and it will build.

https://packages.ubuntu.com/ allows you to search through package contents to find a missing file.

Using this search, you can see libdl.so is contained within the package libc6-dev

To install:

sudo apt update && sudo apt install -y libc6-dev