Login as root and run this command(change username):
usermod -aG sudo username
Reference:
https://linuxize.com/post/how-to-add-user-to-sudoers-in-debian/
Login as root and run this command(change username):
usermod -aG sudo username
Reference:
https://linuxize.com/post/how-to-add-user-to-sudoers-in-debian/