when I do update-grub I get a warning
6913
Grub update warning in Ubuntu 14.04
70383
Blacklisting grub packages from installing
27017
How to fix a grub boot error : "symbol 'grub_calloc' not found
249
How do I fix this "E: Type '*' is not known on line * in source list ..." update error?
53804
How can I prevent Windows from overwriting GRUB when using a dual-boot machine
13156
"Unable to install GRUB in /dev/sda" when installing GRUB
89603
How can I know if reboot is required after update?
85340
Windows 10 upgrade led to grub rescue
90527
Why does my computer keep displaying the GRUB menu when it starts up?
96557
How to exit grub rescue?
136237
After update, get "error: file not found." followed by "grub rescue> _"
154622
How do I resolve this installation error?
8437
“signal out of range” when starting grub after server installation
122716
Cannot update grub with parameters on live USB
592
grub2 not able to find the new kernel
98936
How to set GRUB timeout to 0 on Ubuntu 18.04
118196
Kernel update (64) will not boot. How can I automatically boot with earlier version? U12.04LTS