Ah so the default user will be 'root'.
Good so if we were to reboot our VM and try using the credentials 'root' with the password we supplied to grub2-setpassword :. On other distros that do not provide the script grub2-setpassword the process is a bit more involved, but not terrible. NOTE: We're setting the username to 'root', it can be whatever you want. Sign up to join this community.
The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Ask Question. Asked 1 year, 9 months ago. Active 1 year, 9 months ago. Viewed 2k times. Active Oldest Votes. Good so if we were to reboot our VM and try using the credentials 'root' with the password we supplied to grub2-setpassword : We can now get into the menu: Ubuntu Add password to GRUB2 config and then take the output of that command, grub. Simply type the menu entries you want to add after this comment.
Be careful not to change the 'exec tail' line above. Rebuild GRUB2 grub. References Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Featured on Meta. Community and Moderator guidelines for escalating issues via new response…. Feedback on Q2 Community Roadmap. Related Hot Network Questions.
Question feed.If you are one of those frustrated users who is searching for how to remove grub loader files from Windows 10 then you are in the right place! Guess what? You can do it without cd. Many users want to install both Ubuntu and Windows 10 on their computer systems as we know that these both are different Operating System OS for a Computer.
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I have tried several times to install both of these OS on the same PC, but due to some reasons I always fail to do it. In this article, I am going to tell you how you can apply this method. In the previous guide, we talked about how to install the software in Kali Linux. Before we begin with our primary topic, the first thing that we are going to do is discuss EFI Partition.
The additional file systems can be supported by any conformant vendor optionally. It is a reference exercise or implementation of Multi-Boot Specification which provides its user with a service. That service is a beneficial choice which depends upon the users of this software. This choice is about booting one or multiple Operating Systems OS which are installed on a single computer system.
The user can also select a particular kernel configuration which is available on specific partitions of an operating system. It is broadly used for the Unix-like systems. GRUB is designed to boot an expanded range of Operating Systems which are arising out of file systems of wide range as it is a boot loader. The number of possible root file-systems is increasing which reside upon Linux and due to this file-system GRUB is becoming really popular these days.
Grub is permanently documented in an info file of GNU. The first thing that you have to do is work on the Command Line and search for all of the available hard drives or partitions available on PC. Then after listing all of the available partitions on the hard drive of your PC you have to target a folder which consists of GRUB files. The first step that you have to do is click on start and then move your mouse to the Menu and click it. Then after that, you have to type CMD in the search or run the bar.
In the 1 st image or figure, I have underlined some commands which are used to achieve or complete the first step, such as: selecting and listing the hard drive. Once you have selected the target disk, then all of its partitions will be listed in the CMD, now you can identify the partition or volume which corresponds to the Boot EFI folder. Once this partition has been selected and identified, then the next step that you have to perform is to assign a drive letter because it makes it really easy and straightforward to work.
I have entrusted my disk or partition with the D letter. The last step is the most important step and this step is the essential full stop to all of this process.
This final or previous step requires some changes to the Boot EFI folder, it will again list its contents, but this time it is going to identify the folder which contains GRUB files. These GRUB files will be available or installed under or in the folder with an identical name same as the distribution.
The following commands are used or required to select and identify the hard drive:. These following commands are required or used to select the Boot EFI partition, list the partitions:. You can find more information about the above steps here. However, no matter what version of Windows you are running make sure it is activated. You can read on how to activate Windows 10 for a lifetime using just CMD.
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It only takes a minute to sign up. How can I remove the ability to reset passwords outside of Ubuntu. This probably is ill advised, but I already have set a really good password that I cannot forget with high entropy and 42 characters. I think that it is great that Ubuntu can so easily reset a password, but it seems like a big security risk. I know you can edit grub, but anyone that knows anything about Linux will just edit the boot command and boot into recovery anyway.
Thanks in advance. The only way to be sure is to encrypt the disk. Short of that, you have to physically secure the machine so that someone can not remove the HD and plug it into another machine or boot the machine from removable media. Only then does locking down grub do any good. The best way to protect your installation is to apply all the above fixes and lock the PC into a box with ventilation in a room that only you have a key to. Ubuntu Community Ask!
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It only takes a minute to sign up. Ubuntu Community Ask! Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered.
Asked 1 year, 6 months ago. Active 1 year, 5 months ago. Viewed 1k times. Could someone please advise me on what else I need to do? Thanks in advance, Don. This might be a dumb question to ask, but did you run sudo update-grub after you did the changes and before the reboot? Yes, that was exactly what I needed. Active Oldest Votes. Vijay Vijay 4, 3 3 gold badges 11 11 silver badges 27 27 bronze badges.
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Passwords can be required for all users or only for selected users. The passwords can be stored in encrypted or unencrypted format. This page will detail the procedures necessary to establish and use the GRUB 2 password option.
Some features such as encrypted passwords may not be available in earlier versions. Persons with physical access to the computer can gain access to the files via other methods which GRUB 2 cannot prevent. The administrator must enable password protection manually by editing the GRUB 2 system files.
Either of the above methods enables GRUB 2 to automatically add the password requirement to the the configuration file grub. Edits to this file will be removed when update-grub is run and password protection will be lost. If any form of GRUB 2 password protection is enabled, the superuser's name and password are required to gain access to the GRUB 2 command line and menu-editing modes. Unless GRUB 2's password encryption feature is used, the password is stored as plain text in a readable file.
See the Password Encryption section for guidance on using this feature. How It Works Once a superuser and password are identified, the password feature is enabled the GRUB 2 menu will appear as it does normally.
When a menu item requiring a password is selected, the user will be prompted to enter the correct username and password. If entered correctly, the selected menuentry will continue to boot. If incorrect, the user will be returned to the GRUB 2 menu.
To protect one or more menu items: Each menuentry to be protected must include information on its title line as to which users should be granted access. In Ubuntu Precise or earlier, if no user s are designated for a specific menuentry, access to that entry will be given to all users. In Ubuntu Quantal or later, if no user s are designated for a specific menuentry, access to that entry will be limited to the superuser.
If password protection is enabled, only the designated superuser can edit a Grub 2 menu item by pressing " e " or access the GRUB 2 command line by pressing " c ".
If GRUB 2 is set up to boot automatically to a password-protected menuentry the user has no option to back out of the password prompt to select another menuentry. The user must enter the correct username and password. If unable, the configuration files will have to be edited via the LiveCD or other means to fix the problem. Users experimenting with GRUB 2 passwords should keep at least one non-protected menuentry and set the timeout to at least 1 second until testing is complete. This will allow booting to correct problematic settings.
The authorized users must be identified, their passwords must be designated, and menu items to be protected must be identified. The file must be edited by an Ubuntu user with administrative authority root since it is a system file.
See bug GRUB 2 can encrypt the password using grub-mkpasswd-pbkdf2. See the Password Encryption section for details. A designated user can access unprotected and any to which he is specifically assigned. All menu items can be accessed by all users. To password-protect one or more menuentries, continue with the next section. The format for protecting a menu item consists of adding the user access information to the menuentry title line.
The presence of --unrestricted disables password protection. The presence of --users enables password protection for the specified users. The superuser always has access.GRUB 2 offers two types of password protection:. Password is required for modifying menu entries but not for booting existing menu entries. Password is required for modifying menu entries and for booting one, several, or all menu entries. To require password authentication for modifying GRUB 2 entries, follow these steps:.
Run the grub2-setpassword command as root:. With this change, modifying a boot entry during booting requires you to specify the root user name and your password. Setting a password using the grub2-setpassword prevents menu entries from unauthorized modification but not from unauthorized booting. To also require password for booting an entry, follow these steps after setting the password with grub2-setpassword :.
CentOS / RHEL 7 : How to password protect GRUB2 menu entries
If you forget your GRUB 2 password, you will not be able to boot the entries you reconfigure in the following procedure. Find the boot entry that you want to protect with password by searching for lines beginning with menuentry.
Delete the --unrestricted parameter from the menu entry block, for example:. Now even booting the entry requires entering the root user name and password. Therefore, to retain password protection, use the above procedure after every use of grub2-mkconfig. Booting entries without the --unrestricted parameter requires the root password. However, GRUB 2 also enables creating additional non-root users that can boot such entries without providing a password.
Modifying the entries still requires the root password. Creating a Custom Menu Reinstalling GRUB 2. Here are the common uses of Markdown. Learn more Close.Welcome to the most active Linux Forum on the web. Welcome to LinuxQuestions.
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How to Remove GRUB Password in Linux?
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Open Source Consulting Domain Registration. Search Blogs. Mark Forums Read. User Name. Remember Me? Then press "b" and it will boot you into your shell. Just type "passwd" and change your ROOT password Doing so boots the PC into run level 1-single user mode, where you're automatically logged in as root.