Can't access grub to restore sudo
140231
How to get back sudo on Ubuntu?
39651
GRUB Help and Reinstalling Ubuntu
136771
Why is sudoers NOPASSWD option not working?
18926
Type 'sudo' is not known in source list
4227
How do I login as root?
4209
Monday morning mistake: sudo rm -rf --no-preserve-root /
45541
How to fix sudo after "chmod -R 777 /usr/bin"?
87551
How to repair grub?
141712
Fixing /etc/sudoers file
83727
Grub rescue no such device, also cannot access BIOS
122675
Why don't I have a password for "su"? Problems with "sudo"
73053
Unable to lock the administration directory (/var/lib/dpkg/), are you root?
111138
Sudo command no longer functions properly
47738
Error after sudo-ing "sudo: must be setuid root"
16597
No password prompt at sudo command
4746
How to solve "permission denied" when using sudo with redirection in Bash?
7317
how to: Please sudo, do _not_ setup any environment, especially $SUDO_USER?