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7 obvious rules for administrating physical servers securely

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These rules are written with my own blood and experience. Maybe for somebody, these rules will save a little (a lot) of time and nerves.

These rules are mandatory while working with physical servers if there is even tiny possibility that it’ll lose connection (network setting changes, server core settings, network services setup, reboot after 1 year non-stop work etc.)

  1. Prepare a rollback plan for changes you’re going to implement

  2. Make sure that you know a root server password. If you don’t – set up a new one. Check that you can log in with this password.

  3. Set-up KVM before the work. Don’t start the works before you make sure that you can log in under root user in KVM console.

  4. After you logged in server make sure that you logged in the right server. As minimum perform htop, ifconfig, check contains of  /var/www

  5. Back up all the files you’re going to change

  6. If there are critical services on the server (no downtime acceptable) – make a back up of all of these services data, there is a possibility, that you’re seeing this server for the last time. Check that this back up restores, on a virtual machine for example

  7. Remember, that through a console all servers look the same.

What rules do you obey in these situations? Will you share some?

The original article is here.

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