Nginx Go to file config cd /etc/nginx/sites-available/ View file config (make sure you are in path /etc/nginx/sites-available/) cat default Edit sudo nano default After done editing make sure you restart the Nginx service sudo systemctl restart nginx.service Docker List all running containers docker ps List all running and exited containers docker ps -a View the console of container docker logs -f --tail 500 <container name> Stop running container docker stop <container name> Restart container docker restart <container name> Clear all exited image docker system prune -a Jenkens When build containers with jenkins and have problem: cannot connect to docker daemon run command below: restart docker sudo chmod 666 /var/run/docker.sock Create cert with openssl rsa sha256 cd to directory that you want to put your cert files in openssl rsa -in private.pem -pubout -out public.pem Connect MYSQL ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'allweb17'; FLUSH PRIVILEGES;