WinDbg is not available for Linux but there are some alternatives that runs on Linux with similar functionality. The best Linux alternative is IDA. It's not free, so if you're looking for a free alternative, you could try Cevelop or rr. If that doesn't suit you, our users have ranked more than 10 alternatives to WinDbg and five of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to WinDbg are c[ode]clap (Paid) and MaxBlox (Paid).
MaxBlox is a complete application development platform. The entire system is web-based and allows the ability to build applications that operate over the web. This is architected as a Platform as a Service (PaaS) system.