Sudo ownership changed, can't use sudo to fix it
74253
sudo: /usr/lib/sudo/sudoers.so must be owned by uid 0
3716
How do I add myself back as a sudo user?
28759
Change folder permissions and ownership
44231
Remove sudo privileges from a user (without deleting the user)
90328
sudo unable to resolve host localhost.localdomain
75827
When I run a sudo command it says unable to resolve host
44419
How do I use redirection with sudo
54429
Why can't I sudo some commands? (e.g., vim)
139015
How to change file ownership when chown says "invalid user: ‘–R'"?
140231
How to get back sudo on Ubuntu?
14750
How to Fix "Read-only file system" error when I run something as sudo and try to make a folder/file?
56480
sudo: /var/lib/sudo writable by non-owner (040777), should be mode 0700
89489
How to restore default group/user ownership of all files under /var?
75118
admin no longer has access to shared folder
106720
I can't access the root account anymore: user is not in the sudoers file
78141
Sudo vs root; any actual differences?
66222
'sudo' not working after changing the permissions of '/usr' directory