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As the boot manager GRUB directly supports many file systems, the hard disk contents can be accessed during booting.
For example, even files that Linux users without root permissions will not be able to access after the Linux system has started can be viewed at this stage see SDB: The Boot Manager Grub.
Using YaST2 is the easiest way to set up a password query. In this menu you can first determine where to install GRUB: Press Next to proceed to the Globale Bootloader Properties dialog. Mark Use password for booting and enter the password twice. Press Next to proceed to the configuration of the Sections table, which you can skip by pressing Next.
Select Save current configuration and press Finish in order to save the modifications to the hard disk. The execution of GRUB commands at the boot prompt is now protected. It will only be released after entering "p" and the password. However, all operating systems listed in the selection menu of the boot loader can still be booted by all users.
The word title introduces the sections for booting the individual operating systems. If you want to prevent a certain entry from being booted by unauthorized individuals, insert the word lock under the respective section. The changes will be adopted when the file is saved. In this example, this Linux entry can only be booted if the password is entered. Following a reboot, if this entry is selected from the boot menu, the following message will appear:. Press the Enter key to go to the menu in which you can enter the password by pressing p.
The locked operating system entries can now be booted. If you do not want to use YaST2 to insert the password, proceed as follows: In order to encrypt the password for increased security, execute the command grub-md5-crypt in a shell as root.
You will be asked for the password. After the password is entered, it will be displayed in encrypted form:. The option that needs to be appended is password --md5. The section might look as follows:. Downloads Support Community Development Search. Sign up Login Username Password Cancel.