Linux boot program repair after windows is reinstalled

After windows is reinstalled, the linux boot program will be repaired-general Linux technology-Linux technology and application information. The following is a detailed description. It took a long time to get the two system boot programs done tonight. Now I share my experience and hope you will encounter such problems. My experience will be helpful.

Go to the privileged mode to modify the root partition of the boot program (grub). Note that after windows is reinstalled, the root partition of windows may be modified, so first determine the root partition of the two systems, then modify root (hd0, x). x is the root partition of your two systems.

After the instance is started, select ubuntu and press the key to modify it. For example, change (hd0, 2) to (hd0, 3), enter the kernel, add a single space at the end, and then press B to start it, in the privileged mode, run cd:/boot/grub/and enter vi menu. modify the lst and save it.