Use a boot loader password

Remote Serial Console HOWTO
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# 9.7. Use a boot loader password

Configure the boot loader to request a password when booting a non-default image or when supplying parameters from the command line.

This prevents someone from dialing in during the boot sequence and booting the kernel with options to take control of the machine, as in Example 4-1.

The password should not be the same as the BIOS or root passwords.

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