sudo apt-get update error to fix grub menu
10193
Failed to download repository information due to missing CDROM
135575
How to fix a "Failed to fetch binary-armhf/Packages" error during apt-get update?
51288
Cannot get grub menu to timeout (or go away)
74227
dpkg error when using apt-get install
25957
How do I apt-get -y dist-upgrade without a grub config prompt?
6913
Grub update warning in Ubuntu 14.04
40939
How do I customize the GRUB menu?
56150
Can't upgrade/update ubuntu 18.04 as apt/dpkg error is showing up
4305
How do I fix a "Problem with MergeList" or "status file could not be parsed" error when trying to do an update?
155633
No matter how many times I try re-installing Linux Mint, I get a GRUB error. How do I fix it?
135985
Apt-get saying "Unable to correct problems, you have held broken packages."
34720
What is the difference in command-line "sudo apt-get update" and using Synaptic or Auto-updater?
8914
Grub rescue - error: unknown filesystem
60784
relocation error using sudo apt
78405
I can't get grub menu to show up during boot
40885
What should I do when I got the KEYEXPIRED error message after an apt-get update?
45541
How to fix sudo after "chmod -R 777 /usr/bin"?