diff --git a/grubshell.md b/grubshell.md
index 40cf42a..e64c335 100644
--- a/grubshell.md
+++ b/grubshell.md
@@ -7,7 +7,11 @@
 -  charger le fichier image correspondant au kernel :`initrd /boot/initrd.img`
 -  enter `boot` to boot
 
+## regénérer config
+`grub-mkconfig -o /boot/grub/grub.cfg`
 
+## install sur MBR
+`grub-install --target=i386-pc /dev/sdX`
 ## meme chose depuis grub rescue
 
 `grub rescue> set prefix=(hd0,1)/boot/grub
@@ -17,4 +21,6 @@ grub rescue> normal
 grub rescue> insmod linux
 grub rescue> linux /boot/vmlinuz-3.13.0-29-generic root=/dev/sda1
 grub rescue> initrd /boot/initrd.img-3.13.0-29-generic
-grub rescue> boot`
\ No newline at end of file
+grub rescue> boot`
+
+[archwiki](https://wiki.archlinux.org/index.php/GRUB)
\ No newline at end of file