My solution:
su
then:
groups
Result: exists no group called “sudo”
Therefore (as root):
groupadd sudo
then
usermod -a -G sudo "user"
and reboot. Voila.
My solution:
su
then:
groups
Result: exists no group called “sudo”
Therefore (as root):
groupadd sudo
then
usermod -a -G sudo "user"
and reboot. Voila.