少说话，直接上代码，bing附图。
#在/etc/grub.d/40_custom文件末尾加入一下代码，执行sudo update-grub, OK!
menuentry “Boot Fedora 20 LiveCD” --class Fedora Linux {
insmod loopback
set root=(hd0,9)
set iso_path=“/Fedora/Fedora20.iso”
loopback loop (hd0,9)/$iso_path
linux (loop)/isolinux/vmlinuz0 iso-scan/filename=$iso_path root=live:CDLABEL=Fedora-Live-Desktop-i686-20-TC2 rootfstype=auto ro quiet rd.live.image noeject rhgb rd.luks=0 rd.md=0 rd.dm=0
initrd (loop)/isolinux/initrd0.img
}
