My debian was installed on sda10,now there is a win7.iso was saved on sda5,how to write the grub.cfg file to install win7 ?

You don't normally edit grub.cfg, see https://wiki.debian.org/Grub#Configuring_GRUB_v2. update-grub should recognize Windows automatically.

The Debian instructions at this apURL are a bit thin. Perhaps check the original GNU instructions at https://www.gnu.org/software/grub/gr...mentation.html, or the Arch Linux wiki.

The status is :debian8 was installed on sda 10,win7 iso image is saved on sda5.
My target is to set grub.cfg properly to install win7.
The window7 have not been installed ,there is only a win7 iso image in the sda5,i want to make grub.cfg to install the win7 iso image.
Update-grub should recognize Windows automatically after win7 installed,before that how can do?

How to write something in the grub.cfg?

Ypu cannot engineer GRUB to install Windows. You use Windows to install Windows.

When you install Windows, Windows will bork your boot loader. Windows is narcissistic. It does not recognize the existence of other operating systems.

Once Windows is installed, you then must fix GRUB to get your multi-boot system back.

This article should help; it refers to Ubuntu, but the process it describes is generic: http://www.howtogeek.com/howto/ubunt...-wipes-it-out/

Warning: Once you install Win7, it will nag you to "upgrade" to Win10. Why bother?

I have box that came with Win7 (I dual-boot it with Mageia) and I'm fighting a continual effort to repel boarding from Win10. If Win10 ever succeeds, I'm blowing the whole thing away and making it Linux-only.

1 members found this post helpful.

Won't work. It is possible to boot a windows installation DVD that has been extracted (loop mounted) and copied to an ntfs formatted partition which has been marked as active/bootable. I saw the site below and followed the instructions for it on both a flash drive then tested it on a hard drive and the windows install medium booted. It was windows 10 but I doubt that matters. The install started but I never finished it as the only space I had to install was on a usb external drive. The link below is specific to Ubuntu but should be similar Debian.

http://onetransistor.blogspot.ch/201...om-ubuntu.html

As stated above, make sure you have your install medium for your primary system as installing windows is going to overwrite your bootloader and that means no booting any Linux until you get Grub repaired.

In relation to the link mentioned in post #4, its instruction apply to grub and not grub2. In grub2, the partition numbers begin at 1 and not zero.

same here

7 is not on the first drive
i already reinstalled once when a update AUTO installed bypassing the DO NOT INSTALL -- notify only setting
( ms set a update to "windows update" as CRITICAL!!! and auto installed it ANYWAY )

win tried to write files to the MBR on the first drive -- this WAS NOT the microsoft bootloader but a ext4 grub2 partition

win 7 also NEVER checked IF it could write and went on writing to a partition it can not write too
this FUBAR 'ed windows when it tried to reboot into windows ( during the update) , then tried to undo things and reinstall the files it "saved unsuccessfully to a ect4 partition
BUT AFTER
it uninstalled the updates

basically Microsoft shot it's self in the HEAD with a 357


so


when you dual boot if only ONE disk
let MS have the mbr !!!

and put grub on the first LINUX partition


if two or more disks
switch the boot order to boot the MS drive FIRST
and boot into windows

as to keeping Win-10 off the system
there are about 4 KB????? updates you have to keep OFF win7
KB 3065987
KB 2952664
KB 3035583
KB 2976978

then HIDE them from auto update after you set it to NOTIFY ONLY and not auto install

BUT!!! if MS post a update as critical
it WILL INSTALL ANYWAY!!!!!!! BYPASSING YOUR SETTING!~!!!!!!!

so, Windows might AUTO shoot it's self in the head and kill it's self
so be ready to reinstall windows