CentOS is not installed and there are no startup items after CentOS installation - detailed solution

php editor Xigua will introduce to you in detail the solution to the problem of no installation of CentOS and no startup items after CentOS installation. CentOS is an open source operating system based on Red Hat Enterprise Linux, but sometimes you will encounter some problems during the installation process, such as being unable to install or having no startup items after the installation is complete. In this article, we will provide you with some detailed methods to solve these problems and help you use CentOS operating system smoothly.

As an open source operating system, CentOS is widely used in the server field. When using CentOS, you may encounter some problems, such as failure to install normally or after installation. There are no startup items. This article will introduce in detail how to solve these problems and help you use CentOS smoothly.

Solution to CentOS no installation problem

1. Check the integrity of the ISO file:

You need to ensure that the downloaded CentOS ISO file is complete and not damaged, you can compare it MD5 or SHA1 checksum of the file to verify the integrity of the file. If the checksum does not match, it is recommended to re-download the ISO file.

2. Check the boot sequence:

When installing CentOS, you need to set the correct boot sequence to ensure that the computer starts from the correct device. Enter the computer's BIOS setting interface and check whether the boot sequence is Configure it correctly and put the optical drive or USB device in the first boot position.

3. Check hardware compatibility:

CentOS may be incompatible with some hardware, resulting in normal installation. Before installation, it is recommended to check the hardware compatibility list to ensure that your hardware is compatible with CentOS Compatible, if you find that the hardware is incompatible, you can try to update the driver or replace the hardware.

4. Use other installation media:

If none of the above methods solve the problem, you can try to use other installation media, such as network installation or use other versions of CentOS. Sometimes, some versions CentOS may be more compatible with specific hardware.

Solution to the problem of no startup items after CentOS installation

1. Check the startup sequence:

After installing CentOS, sometimes the startup items are not correctly added to the boot menu. You can enter the computer's BIOS setting interface, check whether the startup sequence is correctly configured, and add CentOS startup items to the boot menu.

2. Repair the boot menu:

If the startup items are not correctly added to the boot menu, you can use the CentOS installation media to repair the boot menu, insert the CentOS installation CD or USB device, and select repair mode , and then select Repair Boot Menu.

3. Update the GRUB boot program:

If none of the above methods can solve the problem, you can try to update the GRUB boot program. In CentOS, you can update the GRUB boot program through the following command:

```

sudo grub2-mkconfig -o /boot/grub2/grub.cfg

This will regenerate the GRUB configuration file, including all available startup items.

4. Check the partition table:

Sometimes, the startup items are not added to the partition table correctly, causing CentOS to fail to start. You can use the partition tool to check the partition table and ensure that the CentOS partition is Configure correctly.

5. Reinstall CentOS:

If none of the above methods can solve the problem, the final solution is to reinstall CentOS. Before reinstalling, it is recommended to back up important data to avoid loss.

Share for you:

In Linux, you can use the `shutdown` command to safely shut down the computer. To shut down the computer immediately, you can use the following command:

sudo shutdown - h now

This will shut down the computer immediately, but you can also use other options, such as setting a shutdown delay or scheduling a scheduled shutdown.

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