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#remove exited containers
docker ps -a | grep Exit | cut -d ' ' -f 1 | xargs docker rm
 
# Delete all containers
docker rm $(docker ps -a -q)
# Delete all images
docker rmi $(docker images -q)
 
#nginx
docker run -ti --rm -d --name nginx -p 81:80 nginx /bin/sh -c 'while true; do echo hello; sleep 10;done'