On small, focused code bases, yes. Anything built in the last 5 years or so can probably be made to work with .NET core and on a non-windows machine.
On large monolithic .NET codebases originally built from the 2000s era, absolutely not. You need to either rewrite or stick to Windows. Porting doesn't seem to be worth the effort.
On large monolithic .NET codebases originally built from the 2000s era, absolutely not. You need to either rewrite or stick to Windows. Porting doesn't seem to be worth the effort.