This article discusses the changes that can be used a Ubuntu Ubuntu boot option or a CD installation. Briefly introduced the main startup options, and then focus on a variety of options to change the boot process. Change the startup command you may need to fix the system freeze or when attempting to install Ubuntu video display problems. It may also be helpful when the existing installation will not start or otherwise need to be adjusted.

Some remedies, such as using F1-F6 keys, the boot process specific to the optical disc. Other programs, such as edit the boot menu line, you can use the LiveCD or on any of the installed system.
For directly editing the GRUB configuration file or other installation issues, please see the link at the bottom of this page for help.


Try Ubuntu

This CD will boot to the Ubuntu desktop. The user can use the system, install applications and drivers, connect to the Internet to access other partitions and use a lot of Ubuntu features.
During the meeting the changes are not permanent. Any changes made by Ubuntu when the user exits will be lost.
Install Ubuntu

Click the Install button or double-click a language selection will begin the installation process.
For more information about installing Ubuntu, see ….

Welcome to the Ubuntu CD Advanced Page Options
Because when the CD-ROM, the user can access the Advanced page, press any key when the small logo appears at the bottom of the screen options:


Here’s advanced welcome page:


Here is a brief description of each main option:

  1. Try Ubuntu without installing.
    As described above, select this option to boot into Ubuntu desktop. Ubuntu will attempt to identify and use the hardware and allow users to connect to the Internet. The default software such as OpenOffice and Firefox is available, and the user can download and install additional software via the Internet. A “Install” icon on the desktop if the user wishes to begin a standard installation without a reboot. In the Live CD session ends, unless the installation is completed, do not change you made will be retained.
  2. Install Ubuntu
    Start a standard on the user’s computer or external drive Ubuntu installation.
  3. Disc defect inspection
  4. Memory Test
    Start Memtest86 + test.
    Press the ESC key to end the test.
  5. From the first hard disk.

Change the default boot option CMD


To supplement the master boot options, F1-F6 keys provide additional information and boot options in special circumstances. These options welcome screen appears, press any key before the visit. Press the ESC key or select a language to display the main screen.

Although they are not usually required, these options provide access to a variety of problems CD-ROM guide to provide additional assistance. Any changes you make will only affect the current boot, it must be made each disc.

  1. F1. Help Index on prerequisites running Ubuntu, start-up mode and a special boot parameters provide information.
    Best deals: F1> F6 and F7

    Press the F1 key, press the F6 or F7 key, you can probably have this additional information useful to the user guide CD issues.
    F1, then F6: kernel parameters to start IBM PS1, disable the USB port, the computer boot locks, and so on.
    F1, then F7: Adaptec kernel parameters, and in some BusLogic Dell hardware.

  2. F2. language selection. As presenter initially display the same image.
  3. F3. Keyboard map selection by country.
  4. F4. mode. When a specific driver must be loaded to allow the installation or start Live CD desktop use this option. Once Ubuntu is installed or activated, the user can permanently install the required drivers.
  5. F5. Accessibility Options. A variety of options to help visually impaired users, as well as on-screen keyboard options and keyboard function keys. To use these features, use the arrow keys to highlight an option, then press ENTER. Repeat for each additional options required for this operation. To delete all the options, highlight “No”, and then press ENTER. The selected option will automatically load at startup. Accessibility options can also be added after installation. Looking for assistive technology and -SPI synapses.
  6. F6. other options. ACPI (Advanced Configuration and Power Interface) and EDD (Enhanced Disk Drive), it can help if your computer does not support these system problems or options. Highlight the selection and press the ENTER key or the spacebar to select it. An “X” will appear, indicating the selection. You can select multiple items from the pop-up menu. Press Esc to leave the pop-up menu. The selection is retained when the user presses the ESC key.

    In addition to displaying the default boot options, press the F6 key can also be opened manually edit the “Boot Options” line once the pop-up window is closed. (See next section)

Change the CD boot option configuration cable
In addition to displaying a pop-up menu, F6 button also activates the boot command line editing. Press F6 to open the pop-up menu. Press the ESC key to choose whether to do or not to remove the pop-ups, but the edit command to open the boot. The phrase “Boot Options” is fixed on the left side of the screen. The command to scroll to the left to leave for additional right. Or after additional input before the user can – ‘. ” So that there is a space between each additional input.

“-” Entry defines the boundaries of the installation and in particular those options are copied to the target system between. Usually you want to copy to the target system boot option, so the option to add the line in the final, after “-.”

The following link describes a new way to use a boot option. Sometimes it must be entered twice, before and after the separator “-.” We found it in Ubuntu Server 14.04.2 and test future versions, we want it to access the file version Ubuntu mini.iso 15.04.

  1. Edit the boot command line.
    1. Press the F6 key.
      1. If necessary, use the arrow keys to select one or more options, and then press Enter or the Spacebar to select.
      2. Press ESC when the pop-up menu, select enable any reservations.
    2. Press ESC to delete a pop-up screen. The boot command line can now be used to edit and remain so as long as there is no visible pop-up menu.
    3. Leave space following the “-” and add the desired options (common boot options list can be added to the presentation on this page to the command line). If you enter more than one option to leave space between each entry.
    4. When you press the ENTER key command will be executed, the startup sequence will begin.
    5. In the F1-F6 keys will still respond, the user can select other menus.
    6. Command line will add to, until you press ENTER key to access.
    7. Press ENTER to start the boot sequence.
  2. Sample entry.
    1. The above is an example of the added VGA = 771 option to boot end of a line item.
    2. Note the following space – before and additional options “.”
    3. Ubuntu now uses GRUB 2 as the boot program. In the example shown in the “VGA =” option does not recommend using GRUB 2, but still work. Installation system after Ubuntu users should be a corresponding entry in the graphics mode GRUB2 configuration file.

Permanently change the startup option for an existing installation

  1. GRUB2 manually edit the configuration file, then update GRUB
  2. Or use the “GRUB option” Startup Repair tab. In this tab, you can add “add kernel option,” a list of options, or click the “Edit the GRUB configuration file” button, then Add / Remove option in any GRUB_CMDLINE_LINUX_DEFAULT line, and then save the file. Then click Apply.


General kernel options
This list is not comprehensive, but it contains the boot command can be added to the end of some common boot options.