First install win7 and then install linux-related systems, such as fedora 14 ubuntu. How can I modify the startup sequence of the boot system?

There is a grub. conf file in the/etc directory.
If this is the case, you only need to change the default value to 1. You can see that 0 is fedora and 1 is windows. Of course, this is not fixed, determine based on the actual situation (that is, the default system is installed after the system is started)
Default = 0
Timeout = 5
Splashimage = (hd0, 7)/boot/GRUB/splash.xpm.gz
Hiddenmenu
Title fedora (2.6.21-1.3194.fc7)
Root (hd0, 7)
Kernel/boot/vmlinuz-2.6.21-1.3194.fc7 Ro root = label =/1 rhgb quiet
Initrd/boot/initrd-2.6.21-1.3194.fc7.img
Title WindowsXP
Rootnoverify (hd0, 0)
Chainloader + 1
 
 
/Etc/grub. conf change default = 0 to default = 1. Start Windows by default (that is, the system installed before fedora is started by default)

Method:

Enter Su on the fedora Terminal

Enter Password

Then press sudo gedit/etc/grub. conf and press enter to modify it.