how to enter GRUB menu during/after start up
9466
How to get to the GRUB menu at boot-time?
93688
How can I add a new operating system boot entry to the GRUB2 menu?
79880
How to boot to the recovery mode if it is not listed in Grub?
42254
Installing Elementary OS - will it automatically be added to the Grub menu?
108195
Grub menu at boot time... "holding shift" not working
58880
How to remove or hide the GRUB boot menu?
69296
How to disable grub menu at boot time in Ubuntu 20.04?
89648
Grub: reboot to specific kernel
78139
No grub menu after Ubuntu install, booting directly into Ubuntu
121451
Add console/text booting mode to grub menu
74199
Boot GRUB to entry not booted to last time?
47237
auto start or enable service on boot up permanently ubuntu 16.04 lts
39946
How to show GRUB after install Ubuntu over Windows 8?
134227
After enabling hibernate grub menu appears on start-up with 30s timeout
129746
How to start custom applications as root automatically on boot?
132030
How to change the time for OS selection menu in GRUB?
47607
Windows boot menu doesn't appear when booting