Which command can show you the available drives detected by the system at GRUB?

The command that can show you the available drives detected by the system at GRUB is 'ls.' This command functions similarly to the 'ls' command in a Linux shell, where it lists the files and directories within a given context. In the case of GRUB, using 'ls' allows users to view all the available block devices and partitions that are recognized by the bootloader, which is critical for identifying where operating systems or kernels are located.

Understanding this functionality in GRUB is essential for tasks such as troubleshooting boot issues or configuring multiboot setups, as it aids in navigating through the available drives and partitions. The other options listed do not correspond to valid GRUB commands, reinforcing the necessity of knowing the correct command syntax within this boot environment.