如​​​​​​​果​​​​​​​在​​​​​​​安​​​​​​​装​​​​​​​过​​​​​​​程​​​​​​​中​​​​​​​ GRUB 没​​​​​​​有​​​​​​​被​​​​​​​安​​​​​​​装​​​​​​​，它​​​​​​​也​​​​​​​可​​​​​​​以​​​​​​​在​​​​​​​之​​​​​​​后​​​​​​​安​​​​​​​装​​​​​​​。​​​​​​​一​​​​​​​旦​​​​​​​被​​​​​​​安​​​​​​​装​​​​​​​，它​​​​​​​自​​​​​​​动​​​​​​​就​​​​​​​变​​​​​​​为​​​​​​​缺​​​​​​​省​​​​​​​的​​​​​​​引​​​​​​​导​​​​​​​装​​​​​​​载​​​​​​​程​​​​​​​序​​​​​​​。​​​​​​​

在​​​​​​​安​​​​​​​装​​​​​​​ GRUB 之​​​​​​​前​​​​​​​，请​​​​​​​确​​​​​​​保​​​​​​​使​​​​​​​用​​​​​​​最​​​​​​​新​​​​​​​的​​​​​​​ GRUB 软​​​​​​​件​​​​​​​包​​​​​​​或​​​​​​​者​​​​​​​使​​​​​​​用​​​​​​​安​​​​​​​装​​​​​​​光​​​​​​​盘​​​​​​​里​​​​​​​的​​​​​​​软​​​​​​​件​​​​​​​包​​​​​​​。​​​​​​​关​​​​​​​于​​​​​​​安​​​​​​​装​​​​​​​软​​​​​​​件​​​​​​​包​​​​​​​的​​​​​​​说​​​​​​​明​​​​​​​，请​​​​​​​参​​​​​​​考​​​​​​​《​​​​​​​Red Hat Enterprise Linux Deployment Guide》​​​​​​​里​​​​​​​的​​​​​​​“​​​​​​​用​​​​​​​ RPM 管​​​​​​​理​​​​​​​软​​​​​​​件​​​​​​​包​​​​​​​”​​​​​​​》​​​​​​​章​​​​​​​节​​​​​​​。​​​​​​​

Once the GRUB package is installed, open a root shell prompt and run the command /sbin/grub-install <location>, where <location> is the location that the GRUB Stage 1 boot loader should be installed. For example, the following command installs GRUB to the MBR of the master IDE device on the primary IDE bus:

/sbin/grub-install /dev/hda

下​​​​​​​次​​​​​​​系​​​​​​​统​​​​​​​引​​​​​​​导​​​​​​​的​​​​​​​时​​​​​​​候​​​​​​​，GRUB 图​​​​​​​形​​​​​​​化​​​​​​​引​​​​​​​导​​​​​​​装​​​​​​​载​​​​​​​程​​​​​​​序​​​​​​​菜​​​​​​​单​​​​​​​会​​​​​​​在​​​​​​​内​​​​​​​核​​​​​​​载​​​​​​​入​​​​​​​内​​​​​​​存​​​​​​​之​​​​​​​前​​​​​​​出​​​​​​​现​​​​​​​。​​​​​​​