أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
If you are using Linux red hat you can edit grub.conf file and add a password
Best option is you can go for BOOT password which can be enabled from BIOS setting.
use BIOS password ... the procedure differ from vendor to vendor
These passwords are set in your BIOS settings screen. On pre-Windows 8 computers, you’ll need to reboot your computer and press the appropriate key during the boot-up process to bring up the BIOS settings screen. This key varies from computer to computer, but is often F2 or F1. In the BIOS settings screen, locate the password option, configure your password settings however you like, and enter a password.
Configure console or line vty password to prevent anyone from accessing the device