lists all the docker containers are running with container details
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
09ca6feb6efc httpd "httpd-foreground" 36 seconds ago Up 33 seconds 80/tcp suspicious_bell
docker ps -a =>docker ps command only shows running containers by default. To see all containers, use the -a (or --all) flag
$ docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
09ca6feb6efc httpd "httpd-foreground" 51 seconds ago Up 49 seconds 80/tcp suspicious_bell
2f6fb3381078 sequenceiq/hadoop-docker:2.7.0 "/etc/bootstrap.sh -d" 2 weeks ago Exited (137) 9 days ago quizzical_raman
9f397feb3a46 sequenceiq/hadoop-docker:2.7.0 "/etc/bootstrap.sh -…" 2 weeks ago Exited (255) 2 weeks ago 2122/tcp, 8030-8033/tcp, 8040/tcp, 8042/tcp, 8088/tcp, 19888/tcp, 49707/tcp, 50010/tcp, 50020/tcp, 50070/tcp, 50075/tcp, 50090/tcp determined_ritchie
9b6343d3b5a0 hello-world "/hello" 2 weeks ago Exited (0) 2 weeks ago peaceful_mclean
docker ps
$ docker ps