grub: chainloader
17.2.1 chainloader
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-- Command: chainloader [--force] file [args...]
Load FILE as a chain-loader. Like any other file loaded by the
list syntax::) to grab the first sector of the current partition
with ‘+1’. On EFI platforms, any arguments after FILE will be sent
to the loaded image.
If you specify the option ‘--force’, then load FILE forcibly,
whether it has a correct signature or not. This is required when
you want to load a defective boot loader, such as SCO UnixWare 7.1.
Info Catalog
grub: Loader commands
grub: initrd