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Howto Re-install Grub after windows wipes it out
Basically you have a good install of ubuntu and then realise that you want to dual-boot. You don't want to erase ubuntu, so you install windows. Grub then gets erased and there is NO way to get back into ubuntu.
So do the following:
1) Boot off the LiveCD
2) Open a Terminal (Applications-Accessories-Terminal) and type in the following commands, noting that the first command will put you into the grub "prompt", and the next 3 commands will be executed there. Also note that hd0,0 implies the first hard drive and the first partition on that drive, which is where you probably installed grub to during installation. If not, then adjust accordingly.
sudo grub
> root (hd0,0)
> setup (hd0)
> exit
4) Reboot (removing the livecd), and your boot menu should be back.
5) Open the grub file:
sudo gedit /boot/grub/menu.lst
6) Scroll to the bottom and add the following:
title Windows XP
root (hd0,0)
makeactive
chainloader +1
Note that you should also verify that hd0,0 is the correct location for Windows. If you had installed Windows on the 4th partition on the drive, then you should change it to (hd0,3).
So do the following:
1) Boot off the LiveCD
2) Open a Terminal (Applications-Accessories-Terminal) and type in the following commands, noting that the first command will put you into the grub "prompt", and the next 3 commands will be executed there. Also note that hd0,0 implies the first hard drive and the first partition on that drive, which is where you probably installed grub to during installation. If not, then adjust accordingly.
sudo grub
> root (hd0,0)
> setup (hd0)
> exit
4) Reboot (removing the livecd), and your boot menu should be back.
5) Open the grub file:
sudo gedit /boot/grub/menu.lst
6) Scroll to the bottom and add the following:
title Windows XP
root (hd0,0)
makeactive
chainloader +1
Note that you should also verify that hd0,0 is the correct location for Windows. If you had installed Windows on the 4th partition on the drive, then you should change it to (hd0,3).
Howto Re-install Grub after windows wipes it out
Basically you have a good install of ubuntu and then realise that you want to dual-boot. You don't want to erase ubuntu, so you install windows. Grub then gets erased and there is NO way to get back into ubuntu.
So do the following:
1) Boot off the LiveCD
2) Open a Terminal (Applications-Accessories-Terminal) and type in the following commands, noting that the first command will put you into the grub "prompt", and the next 3 commands will be executed there. Also note that hd0,0 implies the first hard drive and the first partition on that drive, which is where you probably installed grub to during installation. If not, then adjust accordingly.
sudo grub
> root (hd0,0)
> setup (hd0)
> exit
4) Reboot (removing the livecd), and your boot menu should be back.
5) Open the grub file:
sudo gedit /boot/grub/menu.lst
6) Scroll to the bottom and add the following:
title Windows XP
root (hd0,0)
makeactive
chainloader +1
Note that you should also verify that hd0,0 is the correct location for Windows. If you had installed Windows on the 4th partition on the drive, then you should change it to (hd0,3).
So do the following:
1) Boot off the LiveCD
2) Open a Terminal (Applications-Accessories-Terminal) and type in the following commands, noting that the first command will put you into the grub "prompt", and the next 3 commands will be executed there. Also note that hd0,0 implies the first hard drive and the first partition on that drive, which is where you probably installed grub to during installation. If not, then adjust accordingly.
sudo grub
> root (hd0,0)
> setup (hd0)
> exit
4) Reboot (removing the livecd), and your boot menu should be back.
5) Open the grub file:
sudo gedit /boot/grub/menu.lst
6) Scroll to the bottom and add the following:
title Windows XP
root (hd0,0)
makeactive
chainloader +1
Note that you should also verify that hd0,0 is the correct location for Windows. If you had installed Windows on the 4th partition on the drive, then you should change it to (hd0,3).
Recovering Ubuntu after installing Windows
This page documents how to restore or recover from a boot-loader problem. Ubuntu uses the Grub bootloader, please see GrubHowto for more information on Grub. Some common reasons for repairing your bootloader are installing Microsoft Windows, adding or rem
Ed's Software Guide on Linux
Contents: 1. Dual-Boot Linux and Windows 2000/Windows XP with GRUB HOWTO 2. Share Partitions Between Linux and Windows HOWTO 3. Red Hat 7.2 Linux Install on Dell Inspiron 4100 HOWTO 4. Snapshots of /etc Files
Ed's Software Guide on Linux
Contents: 1. Dual-Boot Linux and Windows 2000/Windows XP with GRUB HOWTO 2. Share Partitions Between Linux and Windows HOWTO 3. Red Hat 7.2 Linux Install on Dell Inspiron 4100 HOWTO 4. Snapshots of /etc Files
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