"Booting grub through DOS"
"Boot the machine to a DOS environment (preferably a pure DOS environment, that is, a DOS environment that does not load any drivers and TSR programs) through any possible means (floppy disk, USB drive, CD-ROM, etc.), and then run grub.exe under DOS or in AUTOEXEC.BAT to enter grub4dos. The above passage focuses on how to operate under the grub prompt after entering grub4dos? Can you write the commands? Thank you."
"Boot the machine to a DOS environment (preferably a pure DOS environment, that is, a DOS environment that does not load any drivers and TSR programs) through any possible means (floppy disk, USB drive, CD-ROM, etc.), and then run grub.exe under DOS or in AUTOEXEC.BAT to enter grub4dos. The above passage focuses on how to operate under the grub prompt after entering grub4dos? Can you write the commands? Thank you."

