"The next step is to run the command 'grub2-mkconfig > /boot/grub2/grub.cfg', but as far as I know, you can't do this with sudo, so you need to be root."
grub2-mkconfig | sudo tee /boot/grub2/grub.cfg
Or if grub2-mkconfig also needs root privies:
sudo grub2-mkconfig | sudo tee /boot/grub2/grub.cfg
Authored Comments
"The next step is to run the command 'grub2-mkconfig > /boot/grub2/grub.cfg', but as far as I know, you can't do this with sudo, so you need to be root."
grub2-mkconfig | sudo tee /boot/grub2/grub.cfg
Or if grub2-mkconfig also needs root privies:
sudo grub2-mkconfig | sudo tee /boot/grub2/grub.cfg
Try:
sudo -u postgres COMMAND