What should I do if centos cannot be started after installing centos from a USB flash drive and removing the USB flash drive?

Problem description:

Unplugging the U disk after installing Centos cannot start

Solution:

Re-establish the boot partition

Specific steps:

1. Switch to root user

#su -- root

2. Enter grub mode

#grub

3. Follow the steps below

grub>find /boot/grub/stage1

or

find /grub/stage1

will generally return something like (hd0,5), remember it.

grub>quit

4. Edit grub.conf

#vim /boot/grub/grub.conf

Replace all occurrences of (hdx, y) in the file with the values ​​obtained in step 3.

5. Re-enter grub mode and perform the following steps. Note that there are spaces between the two commands below.

grub>root (hdx,y)   
grub>setup (hdx)
grub>quit

6. Restart

#shutdown -r now

Recommended tutorial: centos tutorial

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