How to Protect GRUB with Password in Linux ?

GRUB called as Grand Unified Bootloader is a default Boot loader on Unix OS. In a Linux system, anyone can log in to single-user mode and change the system settings. This is one of the security threat and to avoid this we can we require Grub to set password protected.

  1. Login with the root user.

  2. Hit the below command. It will ask for password and generate an md5 hash password. Copy it at a safe location.

    # grub-md5-crypt
    password --md5 $1$b7MLm0$UHtg4Ro6v/JrkWk8yBLMK0


  3. Open the file /boot/grub/menu.lst or /boot/grub/grub.conf and add the saved md5 password which we have generated earlier.

    # vi /boot/grub/grub.conf

          IMP Note: Please take the backup of your grub file without fail so we can restore it if there is an issue.

  1. Now, add the generated md5 password into grub.conf file as password –md5



  2. Save the file by pressing ESC and type:wq to save and exit.

  3. Reboot your server.

  4. Now, whenever you will need to edit the grub menu, you will need to provide the password as per the below image.

  • 0 Users Found This Useful

Was this answer helpful?

Related Articles

How to deploy Mean.js application to Linux VPS?

Upload Mean.js Files via SFTP In FileZilla Once your mean.js webcontent is ready, you need to...

Is it possible to take complete VPS backup in VPS itself?

Please note that, there is no provision to take backup of full VPS image in VPS itself. As an...

How to Install A-AST Linux Malware Detect Interface in cPanel/WHM?

You can scan your cPanel VPS and dedicated server against malware and keep your environment clean...

How To Install PIP in Linux?

PIP called a Package management system for Python. It allows your system to install and manage...

How to install Mongodb in CentOS?

MongoDB is a Free and open-source cross-platform document-oriented database program. Classified...