How to edit Grub Bootloader and remove unwanted entries in Ubuntu

1. How do I delete unwanted entries in grub?
2. How do I edit grub entries?
3. How do I edit a grub file in Ubuntu?
4. How do I customize grub bootloader?
5. How do I clean up grub menu?
6. How do I edit a Grub loader list?
7. How do I customize grub menu?
8. What are the grub commands?
9. How do I save and edit a grub file?
10. How do I get the grub menu in Ubuntu?
11. How do I use GRUB command line?
12. How do I change bootloader?
13. How do I remove GRUB bootloader from BIOS?

How do I delete unwanted entries in grub?

Step 2: Scan through the list to locate the Grub entry you're looking to get rid of. When you've found it, right-click on it to open up the right-click menu. Step 3: Look through the right-click menu for the “Remove” button to instantly delete the menu entry from your Grub bootloader list.

How do I edit grub entries?

It's automatically created by running the update-grub command as root — in other words, by running sudo update-grub on Ubuntu. Your own GRUB settings are stored in the /etc/default/grub file. Edit this file to change GRUB2's settings. Scripts are also located in the /etc/grub.

How do I edit a grub file in Ubuntu?

Open the file with gksudo gedit /etc/default/grub (graphical interface) or sudo nano /etc/default/grub (command-line). Any other plaintext editor (Vim, Emacs, Kate, Leafpad) is fine too. Find the line that starts with GRUB_CMDLINE_LINUX_DEFAULT and add reboot=bios to the end.

How do I customize grub bootloader?

1. Select default OS (GRUB_DEFAULT) Open /etc/default/grub file using any text editor, for example nano. ...
2. Set OS timeout (GRUB_TIMEOUT) By default, the selected entry from the boot menu will start to boot in 10 seconds. ...
3. Change GRUB background image.

How do I clean up grub menu?

Clean up your grub menu from the kernels you do not use

1. Determine which Kernel you are using. Just run: uname -r. and write down the result, in my case this was my output: $ uname -r 2.6.22-14-generic.
2. Look for all installed kernel images. Go to /boot/ and list its contents. cd /boot ls vmlinuz* ...
3. Remove the kernels you want.

How do I edit a Grub loader list?

Steps:

1. make a backup copy of etc/grub/default In case something goes wrong. sudo cp /etc/default/grub /etc/default/grub.bak.
2. Open the grub file for edit. sudo gedit /etc/default/grub.
3. Find GRUB_DEFAULT=0.
4. Change it to the item that you want. ...
5. Then build the updated grub menu.

How do I customize grub menu?

Once installed, search for Grub Customizer in the menu and open it.

1. Start Grub Customizer.
2. Select Windows Boot Manager and move it to the top.
3. Once Windows is on the top, save your changes.
4. Now you'll boot into Windows by default.
5. Reduce the default boot time in Grub.

What are the grub commands?

If you forget a command, you can run the command help (see help).

• blocklist: Get the block list notation of a file.
• boot: Start up your operating system.
• cat: Show the contents of a file.
• chainloader: Chain-load another boot loader.
• cmp: Compare two files.
• configfile: Load a configuration file.
• debug: Toggle the debug flag.

How do I save and edit a grub file?

2 Answers

1. Open the Terminal app ( Ctrl + Alt + T )
2. Type gksudo gedit.
3. Type your password when asked for it (it will not show nothing, even asterisks) and press Enter.
4. Text editor will open up.
5. Then select Open and open the file to edit.
6. Edit the file.
7. Save the file.

How do I get the grub menu in Ubuntu?

With BIOS, quickly press and hold the Shift key, which will bring up the GNU GRUB menu. (If you see the Ubuntu logo, you've missed the point where you can enter the GRUB menu.) With UEFI press (perhaps several times) the Escape key to get grub menu.

How do I use GRUB command line?

There is probably a command that I can type to boot from that prompt, but I don't know it. What works is to reboot using Ctrl+Alt+Del, then pressing F12 repeatedly until the normal GRUB menu appears. Using this technique, it always loads the menu. Rebooting without pressing F12 always reboots in command line mode.

How do I change bootloader?

Change Default OS In Boot Menu Using Startup Options

1. In the boot loader menu, click the link Change defaults or choose other options at the bottom of the screen.
2. On the next page, click Choose a default operating system.
3. On the next page, select the OS you want to set as the default boot entry.

How do I remove GRUB bootloader from BIOS?

Type "rmdir /s OSNAME" command, where OSNAME will be replaced by your OSNAME, to delete the GRUB bootloader from your computer. If prompted press Y. 14. Exit the command prompt and restart the computer the GRUB bootloader is not longer available.