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I know it is my fault to authorize him as a superuser, and I don't have enough knowledge about CentOS 7.

As I wrote in the title, our VPS which runs CentOS 7 lost /usr/bin by mistake. And the server doesn't respond to ping even using its IPv4 address. Unable to access the server in the ways I know, SSH, FTP, HTTPS, SMTP, IMAP.

Are there any ways to fix this problem?

I can create a new instance, but I don't want to lose the data, especially mailboxes, MySQL stored data, web content.

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    Restore from backup.
    – Panki
    Jul 29, 2020 at 10:21
  • 5
    Does your VPS host allow you to access the old VPS’s storage from a new VPS? Jul 29, 2020 at 10:21
  • @Panki, thank you. I have no recent backup. Jul 29, 2020 at 22:41
  • @StephenKitt Thank you, I'll ask it to the hosting company. Jul 29, 2020 at 22:42
  • Ask your hosting company to put a rescue CD so that you can extract your data and then just create a new server and migrate the data to it Jul 29, 2020 at 23:22

2 Answers 2

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Are there any ways to fix this problem?

No, there is nothing we can do. However, there are some options for you:

  1. Restore from backup (this is easy if you have one, if not, next time you know better)
  2. Get support from your provider to ...
    • get access to the storage from a new VPS
    • let your provider access and backup your files for you
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  • Thank you. I have no recent backup. I'll ask them to my provider. Jul 29, 2020 at 22:43
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Had the same issue on RHEL8.6 (advice: never work when you are tired) and tried these high level steps:

  1. Launch the systems in rescue mode
  2. Launch rescue mode from a bootable USB

Both would not work because there was no shell program on the machine

"solved" with these steps:

  1. Created a bootable ubuntu drive

  2. Booted from the USB drive

  3. Mounted the partition belonging to my self-sabotaged installation

  4. Recovered some files I wanted to recover

  5. Installed from ground zero

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