Quote Originally Posted by arsol76 View Post
so,what are those file?could you help me?
Ok, as stated by r083rt, the menu.lst is the grub.cfg (in grub2). ANY modification directly BY HAND to this file might result in a failure boot or boot problems, so it is not recommended.

This file (/boot/grub/grub.cfg) is CREATED by update-grub2 command.

There are 2 files (templates if you want to see them that way) that uses the update-grub2 and you can modify to add entries or OS and modify the order of OS to boot from, names, etc.

1. /etc/grub.d/ is a folder which contains some files, all of those files are read by update-grub command and update the grub.cfg. If you want to add an entry, let's say Windows 7, then edit file 40_custom
nano /etc/grub.b/40_custom and add this entry:

menuentry "Windows 7" {
insmod ntfs
set root=(hd0,1) ----- > hd0 is your first drive sda. 1 is the partition number.
chainloader +1
}

save and close. Here you can create a new file instead of using 40_custom, like 45_Win7, 43_custom_XP, etc.

Now, if you want to alter some parameters for example, timeout to show the list of OS when booting, or change the order to boot the OS, etc, use the file: /etc/default/grub. Edit it and change parameters as needed:

nano /etc/default/grub

save and close it..

Once done, execute the command update-grub2. When it finishes, all changes made will be available at boot....

Now reboot...If you do no see some OS, run os-prober and then again update-grub2...

os-prober searches HDD for partitions and show them in the terminal...

Luck....