grub-file -V (return code: 1)
grub-file: error: cannot open `version': No such file or directory.
grub-file --help (return code: 0)
Usage: file OPTIONS FILE
Check if FILE is of specified type.
--is-i386-xen-pae-domu Check if FILE can be booted as i386 PAE Xen unprivileged guest kernel
--is-x86_64-xen-domu Check if FILE can be booted as x86_64 Xen unprivileged guest kernel
--is-x86-xen-dom0 Check if FILE can be used as Xen x86 privileged guest kernel
--is-x86-multiboot Check if FILE can be used as x86 multiboot kernel
--is-x86-multiboot2 Check if FILE can be used as x86 multiboot2 kernel
--is-arm-linux Check if FILE is ARM Linux
--is-arm64-linux Check if FILE is ARM64 Linux
--is-ia64-linux Check if FILE is IA64 Linux
--is-mips-linux Check if FILE is MIPS Linux
--is-mipsel-linux Check if FILE is MIPSEL Linux
--is-sparc64-linux Check if FILE is SPARC64 Linux
--is-powerpc-linux Check if FILE is POWERPC Linux
--is-x86-linux Check if FILE is x86 Linux
--is-x86-linux32 Check if FILE is x86 Linux supporting 32-bit protocol
--is-x86-kfreebsd Check if FILE is x86 kFreeBSD
--is-i386-kfreebsd Check if FILE is i386 kFreeBSD
--is-x86_64-kfreebsd Check if FILE is x86_64 kFreeBSD
--is-x86-knetbsd Check if FILE is x86 kNetBSD
--is-i386-knetbsd Check if FILE is i386 kNetBSD
--is-x86_64-knetbsd Check if FILE is x86_64 kNetBSD
--is-i386-efi Check if FILE is i386 EFI file
--is-x86_64-efi Check if FILE is x86_64 EFI file
--is-ia64-efi Check if FILE is IA64 EFI file
--is-arm64-efi Check if FILE is ARM64 EFI file
--is-arm-efi Check if FILE is ARM EFI file
--is-hibernated-hiberfil Check if FILE is hiberfil.sys in hibernated state
--is-x86_64-xnu Check if FILE is x86_64 XNU (Mac OS X kernel)
--is-i386-xnu Check if FILE is i386 XNU (Mac OS X kernel)
--is-xnu-hibr Check if FILE is XNU (Mac OS X kernel) hibernated image
--is-x86-bios-bootsector Check if FILE is BIOS bootsector
-h, --help Display this help and exit.
-u, --usage Display the usage of this command and exit.