I was following the instructions provided by Gavin Youker four years ago, until I got to the part of downloading the grub. He apparently loaded it to filedropper, but it is no longer there. Does anyone know where I can find it? Also, reading some other posts, it seems that the one he used and loaded to filedropper may be specific to Ubuntu Ubuntu Community Ask! Sign up to join this community. The best answers are voted up and rise to the top.
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Where do I find grub. Note: For earlier versions of GRUB 2, all kernels residing in the boot folder are included on the main menu. There is currently no line option to remove this entry from the menu. Users familiar with basic scripting can alter these variables to change the format of the displayed menu entries. Removing the executable bit from the file will also prevent it from searching for other operating systems.
By default os-prober ignores any disks that possess "dmraid" signatures, which can be listed via sudo dmraid -r -c if installed. If not found, the script will construct a menuentry from the actual boot information it locates.
The file can be renamed or copied. The file must be executable to be incorporated into the GRUB 2 menu. As mentioned in the introduction of this section, the name of the file determines the location of its contents in the GRUB 2 menu. These files contain no menuentries and thus will not interfere with a menuentry from a custom script with a lower priority.
Options include the time the menu is displayed, the default OS to boot, etc. The default options included in file upon installation are only a small number of the variables which GRUB 2 can recognize. The file is a simple text file and can be edited by any text editor. In Ubuntu the default text mode editor is nano and the graphical mode editor is gedit , and the file can be edited with one of the following commands. The first "menuentry" in grub. Note: Grub 1.
For a menu item in a submenu, the entry becomes a two-digit entry. The first entry is the position of the submenu title in the main menu. The second entry is the position within the submenu. In this case, location in the menu will not matter. The "saved" entry enables the "grub-reboot" and "grub-set-default" commands to set the default OS for future boots. The default OS for future boots will not be set merely by selecting an OS when booting. The format is sudo grub-set-default X , with X being the menu entry position starting with 0 as the first entry or the exact menu string.
Example: sudo grub-set-default 3 Example: sudo grub-set-default "Ubuntu, Linux 2. The format of the command is the same as for grub-set-default see above.
No commands need be run to set the default OS. In order to access the grub terminal over a serial connection an additional option must be added to a kernel definition to make that particular kernel monitor a serial connection. For more information on serial console settings, see Installed Documentation.
The screen tool serves as a capable serial terminal. To install it, run as root :. By default, if no option is specified, screen uses the standard baud rate. To set a higher baud rate, enter:. Menu entries can be modified and arguments passed to the kernel on boot. This is done using the menu entry editor interface, which is triggered when pressing the e key on a selected menu entry in the boot loader menu.
The Esc key discards any changes and reloads the standard menu interface. The c key loads the command line interface. The command line interface is the most basic GRUB interface, but it is also the one that grants the most control. The command line makes it possible to type any relevant GRUB commands followed by the Enter key to execute them. In addition, the arrow , Home , End , and Delete keys work as they do in the bash shell. Rescue mode provides a convenient single-user environment and allows you to repair your system in situations when it is unable to complete a normal booting process.
In rescue mode, the system attempts to mount all local file systems and start some important system services, but it does not activate network interfaces or allow more users to be logged into the system at the same time. In Fedora, rescue mode is equivalent to single user mode and requires the root password. To enter rescue mode during boot, on the GRUB 2 boot screen, press the e key for edit.
Note that equivalent parameters, 1 , s , and single , can be passed to the kernel as well. Emergency mode provides the most minimal environment possible and allows you to repair your system even in situations when the system is unable to enter rescue mode. In emergency mode, the system mounts the root file system only for reading, does not attempt to mount any other local file systems, does not activate network interfaces, and only starts few essential services.
In Fedora, emergency mode requires the root password. Note that equivalent parameters, emergency and -b , can be passed to the kernel as well. Setting up the root password is a mandatory part of the Fedora installation. If you forget or lose the root password it is possible to reset it, however users who are members of the wheel group can change the root password as follows:.
The root password is now required to operate in single-user mode as well as in emergency mode. Resetting the Root Password Using an Installation Disk takes you to a shell prompt, without having to edit the grub menu. It is the shorter of the two procedures and it is also the recommended method. You can use a server boot disk or a netinstall installation disk.
Resetting the Root Password Using rd. Start the system and when BIOS information is displayed, select the option for a boot menu and select to boot from the installation disk. Choose Continue which is the default option. At this point you will be promoted for a passphrase if an encrypted file system is found. Enter the passwd command and follow the instructions displayed on the command line to change the root password.
Remove the autorelable file to prevent a time consuming SELinux relabel of the disk:. Enter the exit command to exit the chroot environment. Enter the exit command again to resume the initialization and finish the system boot. Remove the rhgb and quiet parameters from the end, or near the end, of the linux16 line, or linuxefi on UEFI systems.
The rhgb and quiet parameters must be removed in order to enable system messages. The initramfs will stop before passing control to the Linux kernel , enabling you to work with the root file system. Note that the initramfs prompt will appear on the last console specified on the Linux line.
With an encrypted file system, a password is required at this point. However the password prompt might not appear as it is obscured by logging messages. You can press the Backspace key to see the prompt. Release the key and enter the password for the encrypted file system, while ignoring the logging messages. You will not be allowed to change the password if the file system is not writable.
Note that if the system is not writable, the passwd tool fails with the following error:. Then, during the installation process, all those operating systems and their locations will be discovered and properly set. Adding other records into the GRUB2 menu only means to run grub2-mkconfig command to regenerate the configuration files.
During this process, all operating systems known to the system will be added into the configuration. When problems appear, see the GRUB manual to solve issues with booting secondary operating systems. To change the default layout, we need to set the default based on the name or title. In that case, set the number of the default operating system using the set default variable.
If you edit the configuration file manually, the settings will be overwritten each time the grub2-mkconfig command runs. Sometimes, especially after a secondary operating systems has been installed, the master boot record gets damaged which then prevents the original Linux system from booting. If this happens, it is necessary to reinstall GRUB2 to recreate the original settings.
The process not only discovers all installed operating systems, but usually adds them to the GRUB2 configuration files, so they will all become bootable by GRUB2. Examine the partition layout and identify the boot and the root partition. Mount the boot partition in the boot directory of the filesystem that you have mounted in the previous step.
If improperly configured, GRUB2 may fail to load and subsequently drop to a boot prompt. To boot into the system, proceed as follows:. The following example shows a DOS partition table with three partitions:. Probe each partition of the drive and locate your vmlinuz and initramfs files. There you will search for the full names of the vmlinuz and initramfs files.
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