Holding shift during Boot doesn't enter GRUB menu in Ubuntu 18.04
108195
Grub menu at boot time... "holding shift" not working
93688
How can I add a new operating system boot entry to the GRUB2 menu?
96557
How to exit grub rescue?
78139
No grub menu after Ubuntu install, booting directly into Ubuntu
134227
After enabling hibernate grub menu appears on start-up with 30s timeout
32543
How can I add the Memtest86+ options back to the Grub menu?
142438
Grub menu working but hidden, can't make it visible
112763
Stuck at GRUB command line
144330
Is there a way for grub to automatically reboot into Windows from Windows?
1694
How do I set the grub timeout and the grub default boot entry?
110305
Why is Grub menu not shown when starting my computer?
109602
Why shift-cmd-n fails as a custom shortcut for Firefox "New Private Window"?
123150
How to add Windows to GRUB
60845
Looking for the right way to rename the GRUB boot entries
2222
GRUB does not detect Windows
84732
How to get GRUB to be the default bootloader instead of Windows Boot Manager on a UEFI laptop?
16114
Ubuntu 17.10 and later: can't change the input switching shortcut to alt+shift