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I'm trying to drop a root shell for recovery, but after the reboot, I cannot see the recovery menu where I should select the "Drop root shell" option.

After the secure-boot selection I just prompted for desktop user login. Why? I a remember recovery manu in Ubuntu 17.

Tobia
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2 Answers2

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Immediately after the motherboard / computer manufacturer logo splash screen appears when the computer is booting, with BIOS, quickly press and hold the Shift key, which will bring up a GNU GRUB menu screen. With UEFI press (perhaps several times) the Esc key to get to the GNU GRUB menu screen. Sometimes the manufacturer's splash screen is a part of the Windows bootloader, so when you power up the machine it goes straight to the GNU GRUB menu screen, and then pressing Shift is unnecessary.

You will see a GNU GRUB menu screen that looks like this. Select Advanced options for Ubuntu and press Enter.

enter image description here

A new purple screen will appear showing a list of kernels, which includes options of booting the kernels normally or in recovery mode.

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Use the ↑ and ↓ keys to select which entry is highlighted. Press Enter to boot the selected OS and kernel combination with a choice of either not in recovery mode or in recovery mode options.

enter image description here

From the Recovery Menu use the arrow keys to select root (the second entry from the bottom in the Recovery Menu) and then press Enter.

(Optional): Using the arrow keys scroll down to network (the third entry from the bottom in the Recovery Menu) and then press Enter.

karel
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    That's what I expected, but the recovery menu doesn't appear! It just goes straight on to the desktop login. – Tobia Nov 10 '18 at 10:10
  • If your computer has a discrete GPU take a look at this page for temporarily enabling the nomodeset kernel boot option. – karel Nov 10 '18 at 10:16
  • @karel I'm also seeing no recovery menu. How and why? – Zero Jun 09 '19 at 14:46
  • @Duos To get the Grub menu options to show, rey holding the right Shift key instead of the left Shift key. – karel Feb 14 '21 at 13:25
  • I am also not able to see recovery menu. Please help me if anyone know what's going on. – Kinjal Feb 13 '23 at 07:03
  • @Kinjal The key required to access the GNU GRUB menu screen varies according to the model of the motherboard and its firmware. Also sometimes it's necessary to hold down the key instead of just pressing it. – karel Feb 13 '23 at 07:07
  • I am able to access GRUB menu but after selecting the ubuntu os with recovery mode, i am not able to see recovery option menu (resume, clean, dpkg, etc. this menu). @karel – Kinjal Feb 13 '23 at 07:13
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In Ubuntu 20.04 desktop, to get the Grub menu options to show, you have to hold the right SHIFT key not the left SHIFT key.

manit
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