show disk usage
df -h
who is listening ports
lsof -i -P -n | grep LISTEN
docker
remove intermediate/unused images
docker rmi $(docker images -f dangling=true -q --no-trunc) -f
attach to running container
docker container attach <container-id>
login to docker hub
docker login --username=username
push image to repo
docker push ima/ge:tag
run image as daemon with restart policy
docker run -d -p 80:80 --restart=always ima/ge:tag
run shell on running container
docker exec -it container-id sh