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.

Related Articles

How to Check Bandwidth Usage from WHM Panel?

Within WHM (Web Host Manager), you can check the bandwidth usage of each website hosted. Here are...

How to install ISPConfig on CentOS 7.x?

This article will help you on how to install ISPConfig on CentOS 7.xISP config is an open-source...

Fix :: SSH Error: Starting sshd: Missing privilege separation directory: /var/empty/sshd

Problem Statement Could not connect to Linux machine through SSH. Error Message While starting...

How to change Magento site URL from phpMyAdmin?

Magento is a widely used E-commerce store management system. In this article, we will show you...

How to determine what is using the most disk space on a Linux server?

There are times when you receive following error while accessing the cPanel WebMail or WHM. You...

  • 0 Users Found This Useful

Was this answer helpful?