双系统

[root@MiWiFi-R2D-srv ~]# vi /etc/grub.d/40_custom

#!/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the ‘exec tail‘ line above.
menuentry ‘Windows7‘{
    set root=(hd0,1)
    chainloader +1
}
~                                                                               
~                                                                              

[root@MiWiFi-R2D-srv ~]# grub2-mkconfig -o /boot/grub2/grub.cfg

[root@MiWiFi-R2D-srv ~]# reboot