Skip to Knowledge Base content

I installed Red Hat 7.x next to Windows (Dual boot) and now only Linux boots

Tags linux

The problem, in short, is that Linux doesn’t know Windows exists – you have to inform it.

1. As Root or someone with Root privileges, create the file: 

/etc/grub.d/10_windows7

You can use the touch command to do this. For example:  touch /etc/grub.d/10_windows7

To verify, type:  ls /etc/grub.d/ and check that 10_windows7 shows up in the list.

Using either VIM or nano, add the following content to the file:

#! /bin/bash

echo "Adding Windows7 entry to grub"

cat << EOF

menuentry "Windows" {

set root=hd0(0,1)

chainloader +1

}

EOF

Note:  Adjust hd0(0,1) accordingly. You can use hd0(0,1) if windows is installed on /dev/sda1.

(if there is one hard drive in the computer, Windows is, by default, on /dev/sda1)

2. Make the file you just created executable

Run the command:  chmod +x /etc/grub.d/10_windows7

3. Recreate/Remake the grub config to contain the Windows option

Run the command:  grub2-mkconfig -o /boot/grub2/grub.cfg

4. Reboot

Note that “Windows” will now appear in the list of bootable OS’s.

Was this helpful?
0 reviews

Details

Article ID: 10196
Created
Mon 12/7/15 2:41 PM
Modified
Mon 2/27/17 8:42 AM