Welcome to the MongoDB Community Forums @Matthew_Di_Micelli !`
As @Ramachandra_Tummala noted, ILL (“Illegal Instruction”) indicates that you are trying to run binaries in an environment where your CPU (or virtualised CPU) does not meet not meet the x86_64 microarchitecture requirements for MongoDB 5.0.
To help investigate further can you please:
- Provide the output of
/proc/cpuinfo - Confirm if your Ubuntu is running in a VM and if so, the host O/S and VM software versions
There are a few related discussions on the forums, for example:
- Could not start MongoDB 5.0 running Oracle Linux on VirtualBox
- Impossible to start mongoDB ubuntu server 20.04.03 LTS on Raspberry Pi 4
Regards,
Stennie