How to load Grub menu

[Makkali]

I've just compiled my own kali linux kernel. I've installed & updated grub, but I can't seem to load the grub menu at start up. I've tried holding down shift at start up, but that doesn't help.

Can anyone help me please?

Regards

[prompt_32]

1) have u set the boot flag to the partition contains your boot files ?
2) have u run : grub-install --boot-directory=<my_grub_directory> /dev/<the_device_contains_my_grub_directory> ?
3) is there any grub.cfg file, into /my_grub_directory/grub/ directory, that loads your image files ?

[Makkali]

When I try to update grub i get this error message.

/etc/kernel/postinst.d/zz-update-grub 3.18.7 /boot/vmlinuz-3.18.7
/usr/sbin/grub-probe: error: cannot find a device for / (is /dev mounted?)..

This is what I've done so far
# mkdir /boot/grub
# update-grub

Since I didn't have the file 'grub.cfg' I downloaded it, edited the timeout and updated grub. The timeout is set to 10. But I still can't load the grub menu!

prompt_32
I get an error in step 2
# grub-install --boot-directory=/boot/grub /dev/sdb
Unrecognized option `--boot-directory=root/boot/grub'
Usage: grub-install [OPTION] install_device
Install GRUB on your drive.

[Makkali]

I just installed Linux on my laptop and I now see the Grub menu when I boot.