Debian

https://www.digitalocean.com/community/tutorials/how-to-troubleshoot-common-apache-errors

SUDO not found

su -
apt update
apt install sudo -y

Usermod

su -
usermod -aG sudo user

IMP

sudo systemctl status appache2
sudo systemctl start apache2.service 

sudo service nginx restart

journalctl

Path

/var/www/
/etc/apache2/