Gnu Grub Commands

Now you are here at LinuxAndUbunu to see how you can tackle out of this problem and save your precious data and boot normally into Linux again. exe, which is a hybrid executable that can be launched from linux console and DOS prompt. MINIX OpenSolaris Berkeley Software Distribution GNU. Using the command-line interface, you type the drive specification and file name of the kernel manually. Command-line interface: The flexible command-line interface ; Menu interface: The simple menu interface. For the first word, TAB lists possible command completions. org GRUB Manual does discuss direct creation and modification of /boot/grub2/grub. The GRUB bootloader provides a minimal shell where we may run some diagnostic commands. One of my Linux CD Mall customers emailed me the other day with a Linux annoyance: "The computer always booted into Linux by default if I wasn't quick enough to stop it. 10 on a seprate HDD in my computer. GRUB can load different operating systems. Re: Grub get and set efi variables, Mat Troi, 2015/11/03. This utility was designed to minimize the chance of data loss, but it is still recommended to back up your files before using this program. Boot from USB, click Troubleshooting, then Command Prompt, and type: [code]Bootrec. 99 Table of Contents GNU GRUB manual 1 Introduction to GRUB 1. Finally you need to open a Terminal and run the command ‘sudo update-grub’. I installed KDE Neon and I was using it without any problem since the summer. It is the first program which starts when the program is switched on. 3 The list of command-line and menu entry commands. I got the system to reboot and give me the Grub command line but for the life of me I can not seem to get it to give me a menu to boot my new sytem. So far so good, but now the console is. GRUB configuration files. Re: Ubuntu boots to grub> command line If the last post doesn't get you in to the OS post the bootscript in my signature in code tags as described. openSUSE 12. The POST occurs when a system is turned on from an off state. txt), PDF File (. In BIOS I've chosen to launch 1. GRUB is the reference implementation of the Free Software Foundation's Multiboot Specification, which provides a user the choice to boot one of multiple operating systems installed on a computer or select a specific kernel configuration available on a particular operating system's partitions. I am trying to boot my own simple OS kernel using GRUB stage2_eltorito. How To Install GRUB 2 On Ubuntu 9. Be careful. Build the GRUB Config. target hibernate. 1BestCsharp blog 5,450,731 views. FG and BG are symbolic color names. If you do not boot from the cdrom you cannot access to its files. 97 Boot a Windows XP CD, select Command Prompt, and give the command FIXMBR. GNU GRUB (short for GNU GRand Unified Bootloader, commonly referred to as GRUB) is a boot loader package from the GNU Project. GNU GRUB (short for GNU GRand Unified Bootloader) is a boot loader package from the GNU Project. img を使用する 事でハードディスクからの起動が可能です。. Warning: The default configuration file for GRUB2 is /boot/grub/grub. GNU GRUB is a boot loader package from the GNU Project. The installgrub(1M) command is the supported way to install GRUB boot blocks. We can see that grub has found a Linux file system EXT3, and set root to it. We also provide a program called start-stop-daemon which is used to start daemons at boot time or to stop daemons when the runlevel is changed (e. For the first word, TAB lists possible command completions. com - date: November 12, 2010 hi dears I have a problem when I turn on my laptop I see this on the screen: GNU GRUB version 0. It does the main part of the work automatically with the help of a couple of files for the configuration of the booting system. Rescue mode saves unbootable cases. Ubuntu and most other Linux distributions now use the GRUB2 boot loader. For the first word. 02 ~beta3-4ubuntu7 minimal BASH-like editing is supported. But there's a problem: there are a LOT of modules, and they scroll off screen. It provides an easy to use interface allowing effortless modification of OS's and the flexibility to configure the most obscure options. 2) Can i access the data in ISO9660 from grub command line ? If you make a grub cd or burn it and you boot from it you can access the data of the cd beginning files with (cd). You are currently viewing LQ as a guest. Anywhere else TAB lists possible device or file completions. The text from running this script will give us a larger look at your setup. 5 and implements a modular configuration approach in which code to handle various partitioning systems, file systems, and other extensions are stored in disk files—typically, in /boot/grub. grub originated in 1995 when erich boleyn was trying to boot the gnu hurd with the university of utah's mach 4. GRUB is the reference implementation of the Free Software Foundation's Multiboot Specification, which provides a user the choice to boot one of multiple operating systems installed on a computer or select a specific kernel configuration available on a particular operating system's partitions. Run Command Prompt under Admin and go to the grub-2. The first line of code is executed and as we just saw, this function reads the body of a selected menu entry and executes commands from it. It sounds to me like you installed Windows and GNU/Linux (a. This is the documentation of GNU GRUB, the GRand Unified Bootloader, a flexible and powerful boot loader program for PCs. You shouldn't edit or modify this file, unless you are much familiar with GRUB2. You could always hardware reset instead, but make sure to use the sync command first. 02 command line instead of the graphical menu as usual. Anywhere else TAB lists the possible completions of a device/filename. error: unknown filesystem. cd /d C:\grub-2. But don't fret, this may not be the end. GNU GRUB is a multiboot boot loader, meaning that it is capable of supporting multiple operating systems on a single hardware platform. Anywhere else TAB lists possible device or file. When the Trisquel GRUB screen appears, select the Install Trisquel in Text Mode option. GRUB flexibility and easy-to-configure boot parameter has made it the default choice for most of GNU/Linux distros. 2 The list of general commands. 1 [Command-line interface], page 53), or a menu interface (see Section 14. 02~beta2-9ubuntu1. d/50_custom file. Rescue mode saves unbootable cases. GRUB allows a number of useful commands in its command line interface. GRUB works similarly; here are some example GRUB commands: grub> set root='usb0' grub> linux /path/to/kernel PARAMETERS MAYBE\_MORE\_PARAMETERS grub> initrd /path/to/initrd grub> boot. The GRUB 2 command shell is just as powerful as the shell in legacy GRUB. How to change the GRUB 2 Default Timeout and Boot Order - Ubuntu Posted by Nikesh Jauhari GRUB 2 is the next generation of GNU GRUB, using version numbers 1. PHOENIX OS GNU GRUB ERROR WILE BOOTING FIXED (100%). GNU GRUB version 0. GNU GRUB version 2. The above commands will get you out of the rescue mode to the normal terminal mode. Router(config)# config-register 0x0000 GNU GRUB version 0. You need to re-link grub to the Mint partition. Note that /boot/grub/menu. There are a lot of methods in Linux that can be used to re-install a broken grub, some can involve the ability to work and restore the boot loader by using the Linux command line and others are fairly simple and implies booting the hardware with a Linux live CD and using the GUI indications to repair the damaged boot loader. Resetting GRUB Boot Password Protection. Command update-grub reads file /etc/default/grub and generates proper Grub configuration file. These commands are usable in the command-line and in menu entries. How To Log Into Windows 7 If You Forgot Your Password WITHOUT CD OR SOFTWARE!!. I am trying to install kali 2. This utility was designed to minimize the chance of data loss, but it is still recommended to back up your files before using this program. 97 (639K lower / 1034712K upper memory) [Minimal BASH-like line editing is supported. However, when I try to load my kernel, it says I need to load a hard disk first, using the root command. It comes with several improvements, new features and bug fixes as enhancements of the original GRUB program. In BIOS I've chosen to launch 1. There’s a command line way which we will try to avoid here for two reasons. The first step is usually to discover where the GRUB configuration files are located. GRUB starts in command line after reboot. If you had used the Beginners' Guide or the Installation Guide you would have learned that the correct command is "pacman -S grub" (not grub-bios as in the blog you were trying to use). Hi guys, here I showed up on this video how to fix grub rescue error and about boot settings and about grub rescue commands. # Copyright (C) YEAR Free Software Foundation, Inc. GNU GRUB (short for GNU GRand Unified Bootloader) is a boot loader package from the GNU Project. If no configuration file is present, GRUB drops to the command-line. As a good and organized computer user, I started looking and asking how to clean this messy looking GRUB and found the solution. GNU GRUB on Wikipedia. Step 2: Network Services Configuration. Next you need to specify the default OS for grub to boot. Thanks Microsoft. This is the main file to boot into the Linux OS. Ways To Rescue Or Recover Grub. Anywhere else TAB lists the possible completions of a device/filename. GRUB Legacy The home of the GRUB Legacy; GRUB Legacy. (Once a foreign OS is booted, of course, it can be used to access any part of an unencrypted hard drive). Up to Debian Lenny. OieIcons Icon Themes. 97 (640K lower / 3072K upper memory) <-- This is the output from grub after [ Minimal BASH-like line editing is supported. GNU GRUB FAQ. GNU GRUB Manual 2. 97(502k Lower/496556K upper memory) [Minimal BASH-like line editing is supported. GRUB Legacy configuration. GRUB looks for its configuration file as soon as it is loaded. GRUB is the reference implementation of the Free Software Foundation's Multiboot Specification, which provides a user the choice to boot one of multiple operating systems installed on a computer or select a specific kernel configuration available on a particular operating system's partitions. All GNU Grub scripts and commands are supported for both UEFI and legacy systems. Initially, you are prompted to choose between alternate kernels (by default, the system will boot using the latest kernel) and are allowed to enter a GRUB command line (with c) or edit the boot options (by pressing the e key). GRUB vs LILO The two boot loaders that Red Hat Linux provides for x86 architecture are the Grand Unified Boot Loader (GRUB) and the Linux Loader (LILO). 1 to Windows 10 last night. Ubuntu and most other Linux distributions now use the GRUB2 boot loader. I encountered a couple of snafus trying to install grub on my home machine after installing Mandrake 8. If one is found, then the full menu interface is activated using whatever entries were found in the file. Either stage1_5 or stage2 read the menu. cfg file or modify the /etc/grub. It allows you to choose which operating system or specific kernel to boot into. Rather, GRUB is the GNU GRand Unified Bootloader. For the first word, TAB lists possible command completions. Finally, issue the command sudo grub-mkconfig -o /boot/grub2/grub. The GRUB shell, although present in /boot/grub/bin/grub, is not yet supported, and some of the commands will not function on the Solaris OS due to operating system limitations in making BIOS calls. I am running a bios system with a GPT created with Gparted. This is the OS booted if we don't use grub-reboot. GNU GRUB on Wikipedia. Enter the command "grub" to display the GRUB command line prompt where further commands will be entered: grub> Hint: If your computer is not equipped with a floppy drive, use the option "--no-floppy" when starting GRUB to skip the search for a floppy drive. GNU GRUB (short for GNU GRand Unified Bootloader, commonly referred to as GRUB) is a boot loader package from the GNU Project. How To Install GRUB 2 On Ubuntu 9. GNU Parted utility GNU Parted is a text-based partitioning utility that works with MBR, GPT, APM, BSD disk labels and other disk types. Linux Information Portal includes informative tutorials and links to many Linux sites. Select the line ending with "(recovery mode)", probably the second line, something like: Ubuntu GNU/Linux, with Linux 3. GNU GRUB ("GRUB" for short) is a boot loader package from the GNU Project. GNU GRUB also called GRUB, short for GNU GRand Unified Bootloader, refers to a boot loader package from the GNU Project. GRUB allows a number of useful commands in its command line interface. For the first word, TAB lists possible command completions. How Do I Add Windows 8. GRUB permet un certain nombre de commandes utiles dans son interface ligne de commande. You can try getting the usual Grub menu back up by doing the "find" and then the "configfile" commands (see above), but these may not work. GRUB Legacy is not actively developed any longer. The most common modifications of the /boot/grub/grub. You shouldn't edit or modify this file, unless you are much familiar with GRUB2. The GRUB 2 shell supports a range of commands, many of which are similar or identical to the commands used in grub. In the terminal mode you have more commands with increased functionality. grub-mkrescue - make a GRUB rescue image | linux commands examples - Thousands of examples to help you to the Force of the Command Line. 1- you boot onto windows and create a recovery media on an USB drive - if yo. If you forget a command, you can run the command help (see help). In fact, it gives you complete access to all filesystems on the local machine regardless of permissions or other protections. Commandes GRUB. Grub-theme-vimix GRUB Themes. It is responsible for loading and transferring control to the operating system kernel, (Linux, in the case of Fedora). This is a guide to running Linux with the Asus X73S laptop. This command will install GRUB on the MBR in the first drive. Any ideas of what could be wrong?. Any ideas of what could be wrong?. 02-for-windows directory that you extracted above. For the first word, TAB lists possible command completions. In GRUB for DOS, the map command can be used to create virtual harddisks and floppies from image files. Grub 2 typically gets overridden when you install Windows or another Operating System. If you have Linux installed on your system, then you must have seen the bootloader menu from which you can choose between. Note that you can enter a command line from the grub boot menu and just type commands as above to test out different combinations. In the fdisk -l command, the Ubuntu partition is identified by the word Linux in the System column. Insert the USB drive and boot the system. Grub2Win boots native GNU Grub version 2. Briefly, boot loader is the first software program that runs when a computer starts. 4 of the GNU/Grub official bible Grub Manual. If you choose the command-line menu option, or if the configuration file was not found, then GRUB drops to the command-line interface. Finally, issue the command sudo grub-mkconfig -o /boot/grub2/grub. I looked up online, and I saw I need to load my kernel. SUSE uses cookies to give you the best online experience. 3 The list of command-line and menu entry commands. Once you have the package, unpack, build, and install it with the commands: tar -xzvf grub-. Commands belong to different groups. Up to Debian Lenny. Anywhere else TAB lists the possible completions of a device/filename] grub>. img grub> boot Replace hd0 with your hdd number and /dev/sda1 with your partition holding the /boot mainly the dafult will work if you don't have more than one hdd and with default installtion. Changing GRUB boot order to boot Windows XP before Ubuntu April 29, 2007 One goal of installing Ubuntu is to help ease my wife and kids onto it – not to create a huge problem with the family. I'm not a grub developer but a grub user, so maybe you have hit another bug too. My other articles: Highly useful Linux commands & configurations. Some of the commands accept options after their name; these options should be separated from the command and other options on that line by space characters. In Linux, the "grub-install" command is used to install stage1 to either the MBR or a partition. However, the compiled ISO simply leads to a GRUB prompt. GNU GRUB Manual 0. grub-set-default. GRUB works similarly; here are some example GRUB commands: grub> set root='usb0' grub> linux /path/to/kernel PARAMETERS MAYBE\_MORE\_PARAMETERS grub> initrd /path/to/initrd grub> boot. The enter grub's command prompt: # grub GNU GRUB version 0. FG and BG are symbolic color names. For the first word, TAB lists possible command completions. # grub-mkconfig -o /grub/grub. Best definitive way of doing this ?. cfg file (to add command line parameters to the kernel or change the duration that the menu is displayed, for example) are made through the variables in /etc/default/grub. For the first word, TAB lists possible command completions. A fairly flexible command-line interface, accessible from the menu, is available to edit any preset commands, or write a new boot command set from scratch. GRUB configuration files. GNU GRUB, the GRand Unified Bootloader, is intended to provide important bootloader features that are missing from typical personal computer BIOSes. GNU GRUB (GNU GRand Unified Bootloader) es un gestor de arranque múltiple, desarrollado por el proyecto GNU que nos permite elegir qué Sistema Operativo arrancar de los instalados. In this article, I will show you how to use GRUB Rescue command line interface of GRUB. YoLinux Tutorials: GNU GDB Debugger Commands. 02~beta2-9ubuntu1 Minimal BASH-like line editing is supported. The GRUB shell, although present in /boot/grub/bin/grub, is not yet supported, and some of the commands will not function on the Solaris OS due to operating system limitations in making BIOS calls. (Once a foreign OS is booted, of course, it can be used to access any part of an unencrypted hard drive). Here is how to re-install grub from the DVD. This command will show all the partitions on your hard drive. Somehow, that helps it figure out that the entire boot filesystem is stuck in an ISO file. Briefly, boot loader is the first software program that runs when a computer starts. Command update-grub reads file /etc/default/grub and generates proper Grub configuration file. 14+linuxmint1 Minimal BASH-like line editing is supported. Anywhere else tab lists possible device / file completions" prompt states sh:grub typing in startx or anything with sudo is not recognized. [link] Boot your operating system, with the installation media. How Do I Add Windows 8. Real memory management, to make GNU GRUB more extensible. GNU GRUB is a very powerful boot loader, which can load a wide variety of free operating systems, as well as proprietary operating systems with chain-loading 1. FG and BG are symbolic color names. The YoLinux portal covers topics from desktop to servers and from developers to users. com - date: November 12, 2010 hi dears I have a problem when I turn on my laptop I see this on the screen: GNU GRUB version 0. d/50_custom file. I found that the –f parameter was necessary to get the reboot command to work for some reason. For the first word, TAB lists possible command completions. If no configuration file is present, GRUB drops to the command-line. Gordon Matzigkeit Yoshinori K. GRUB allows a number of useful commands in its command line interface. For grub-bootloader, for example, it should be a device name understood by the bootloader installer command, such as /dev/sda or (hd0) (see Invoking grub-install in GNU GRUB Manual). With UEFI press (perhaps several times) the Escape key to get grub menu. , from multi-user to single-user or to halt). List of commands for both, GRUB and GRUB Legacy, on GRUB wiki. GNU GRUB ("GRUB" for short) is a boot loader package from the GNU Project. GRUB is a reference implementation of the GNU Multiboot specification, commonly used by most 32 bits OS developers. Brief: Cannot access Linux in dual boot because system boots straight to Windows without showing the grub menu? Here is a possible fix for you. cfg should not be edited—it is automatically generated by the command grub2-mkconfig -o /boot/grub2/grub. grub> quit In this example the root partition is (hd0,0) as returned by the "find /boot/grub/stage1" command. lst and grub. For the first word, TAB lists possible command completions. Okuji and Gordon Matzigkeit took over the maintainership, and opened the development in order for everybody to participate it. GRUB (GRand Unified Bootloader) A program that calls a Unix/Linux operating system into memory. If one is found, then the full menu interface is activated using whatever entries were found in. * GRUB is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. Search Search. It's not yet working for me - I have got as far as step 3. Anywhere else TAB lists possible device or file completion grub> I have googled some things and I think I need to restore the default Windows boot manager. For more information, you must read the GNU GRUB Manual In particular, you need to familiar with The list of command line and menu. Otherwise you'd be able to test all these images without even restarting :P (I tried running it from both terminal and virtual terminal). October 26, 2011 Installing GRUB 0. 3 is using Grub2 by default and Grub2 has a whole new command set to learn. If you have Linux installed on your system, then you must have seen the bootloader menu from which you can choose between. The command-line in GRUB2 (a popular bootloader) offers admins a great tool for managing and fixing GRUB as well as other parts of the computer system. This is a list of commands from the GNU Core Utilities for Unix environments. exe, which is a hybrid executable that can be launched from linux console and DOS prompt. Command-line interface: The flexible command-line interface ; Menu interface: The simple menu interface. Commands usable anywhere in the menu and in the command-line. GNU GRUB, the GRand Unified Bootloader is intended to provide important bootloader features such as dual booting, command line and graphical interfaces etc. But after booting either Linux or Windows then rebooting, I GRUB starts in command line mode, as seen in the following screenshot: There is probably a command that I can type to boot from that prompt, but I don't know it. A GRUB menu booting 100+ systems of DOS, Windows, Linux, BSD, and Solaris. GRUB Legacy is not actively developed any longer. For details on how to actually install and configure the required modules have a look at our guides section for distribution sp. Changing the configuration for GRUB2 is fairly easy once you actually figure out how to do it. I recently booted Windows 10 to work with some MS Word documents and (foolishly) allowed the system to update. The first and foremost rule is: Windows OS always wants to be installed on a first hard drive and first partition. It used to be the dominant boot loader for Linux, but it’s been largely replaced by GRUB 2. In the grub shell, specify the file file as the actual drive for a bios drive drive. howopensource@ubuntu:~$ sudo update-grub To change boot order just execute the next command. Imagine that you want to install grub, on one of your external hard disk, and is currently mounted under /mydisk. Media in category "GNU GRUB" The following 23 files are in this category, out of 23 total. A large community has continually developed it for more than thirty years. for the first word, TAB lists possible commands completions. Some of the commands accept options after their name; these options should be separated from the command and other options on that line by space characters. img を使用する 事でハードディスクからの起動が可能です。. GRUB can load different operating systems. When you reinstall GRUB, MBR boot code points either to GRUB's stage1_5 file (After MBR and before first partition) or to GRUB's stage2 file (found at the linux filesystem). GNU GRUB version 2. The command-line in GRUB2 (a popular bootloader) offers admins a great tool for managing and fixing GRUB as well as other parts of the computer system. cfg file is assembled into the correct sequence. GNU GRUB (short for GNU GRand Unified Bootloader) is a boot loader package from the GNU Project. Although you can scan and boot into most of the operating systems installed on computers such as Windows, Linux, FreeBSD and macOS from the AIO Boot’s Grub2 menu. GRUB: it's neither larva, fast food nor the loveliest of acronyms in the GNU herd of free software. debian/ubuntu etc. The command output will now pause every page of output until you press a key. It sounds to me like you installed Windows and GNU/Linux (a. cfg Now, install GRUB into your hard drive's master boot record (MBR). cfg should not be edited—it is automatically generated by the command grub2-mkconfig -o /boot/grub2/grub. You get a black screen with a message that “Unknown Filesystem” and a message saying grub rescue. Modifying the Linux Grub boot loader's options Posted in Linux/Unix/BSD - Last updated Apr. When you reinstall GRUB, MBR boot code points either to GRUB's stage1_5 file (After MBR and before first partition) or to GRUB's stage2 file (found at the linux filesystem). grub - Free download as Text File (. Commands belong to different groups. d and menu-configuration settings taken from /etc/default/grub when generating grub. The list of command line and menu entry commands. When I boot into Ubuntu it makes memtest the default boot menu option. GNU GRUB is a Multiboot boot loader. Instead of going to the BIOS every time, I'd like to add an entry in grub menu to boot the CD-ROM. 97 Boot a Windows XP CD, select Command Prompt, and give the command FIXMBR. org, a friendly and active Linux Community. GRUB is the reference. Basically the grub config file grub. All partitions are formatted in ext3. Since Grub uses a slightly different device mapper, let's use it to find the partitions:. In GRUB for DOS, the map command can be used to create virtual harddisks and floppies from image files. For the first word, TAB lists possible command completions. I am using GPT/UEFI system. GNU GRUB is a boot loader package from the GNU Project. txt) or read online for free. To add entries to the menu, you can either create a /boot/grub/custom. cfg is automatically rebuilt with kernel installations/removals, updates to some GRUB 2 packages, when update-grub is executed, or when other. It provides an easy to use interface allowing effortless modification of OS's and the flexibility to configure the most obscure options. exe, which is a hybrid executable that can be launched from linux console and DOS prompt. GRUB Legacy configuration. cfg file and will again include all operating systems present on system. conf, start the user selected system when the user makes a selection, or if no selection is made, start the default system when the time to wait expires. In GRUB for DOS, the map command can be used to create virtual harddisks and floppies from image files. "GNU GRUB version 2. GNU GRUB ("GRUB" for short) is a boot loader package from the GNU Project. It's okay to edit the grub. Instead of going to the BIOS every time, I'd like to add an entry in grub menu to boot the CD-ROM. The next few commands work with both grub> and grub rescue>. Example 1:. To dig up by or as if by the roots: grubbed carrots with a stick. Booting - Wikipedia explanation about booting computer in general. GRUB2 is replacing GRUB at the moment and GRUB is been renamed as GRUB Legacy. A bootloader is very important as it is impossible to start an operating system without it. Thanks Microsoft. Once GRUB has loaded its root partition (which equates to the /boot partition and contains the Linux kernel), the kernel command can be executed with the location of the kernel file as an option. Using the word generator and word unscrambler for the letters B L U R T I N G, we unscrambled the letters to create a list of all the words found in Scrabble, Words with Friends, and Text Twist. You shouldn't edit or modify this file, unless you are much familiar with GRUB2. conf" will display the configuration file from the floppy; long files will scroll off the screen. It provides an easy to use interface allowing effortless modification of OS's and the flexibility to configure the most obscure options. GNU GRUB 2 Debugging with GDB HOWTO Ľubomír Rintel Self-standing programs such as operating system kernels or boot loaders tend to be generally harder to debug than user-mode applications, because environment they run it is not very friendly to debuggers. This should be a good start to allow you to make GRUB Themes for your system. A GRUB menu booting 100+ systems of DOS, Windows, Linux, BSD, and Solaris. 02 ~beta3-4ubuntu7 minimal BASH-like editing is supported. GRUB images in the device IMAGE_DEVICE, otherwise use the current "root device", which can be set by the command "root". Grub 2 typically gets overridden when you install Windows or another Operating System. This should return the location of GRUB files on your hard disk. For example, if the previous command returned (hd0, 1), you should issue root. The default menu only has a GRUB "Safe Mode" boot option to choose from, but not the option to choose to boot to single user mode. grub - Gnu grand unified bootloader.