docker help
docker version --help
docker version
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docker search nginx
docker run -d --name basic_nginx nginx
docker ps
docker images
docker exec -it basic_nginx /bin/bash
date
whoami
ps -ef
vim
(Oops... it says "bash: vim: command not found")
exit
docker run -d --name enhanced_nginx saiakhil2012/nginx:with_vim
docker exec -it enhanced_nginx /bin/bash
date
whoami
ps -ef
vim
(This time vim works :) )