> * Not having a minimal straightforward shell to troubleshoot from There is a shell for UEFI. It feels a lot like a reimplementation of MS-DOS shell, with "FS

> * Not having a minimal straightforward shell to troubleshoot from There is a shell for UEFI. It feels a lot like a reimplementation of MS-DOS shell, with "FS0:" to change drives etc, but it has directory listings, file copying, etc. The interface is standardized and there's an open source implementation in EDK2. If you build Linux kernels as "EFISTUB", they're simply executables in the UEFI shell. https://github.com/tianocore/tianocore.github.io/wiki/ShellPkg https://github.com/tianocore/tianocore.github.io/wiki/ShellP...