Added check for running dockers in loop

docker-ssh

#!/bin/bash

# docker id might be given as a parameter
DID=${1}

if [[ ! ${DID} ]]; then
  # get last running docker ID when there is parameter argument
  DID=$(docker ps -q -l -f status=running)
fi
if [[ ${DID} ]]; then
  # get docker and image name for known docker ID
  NAME_IMAGE=$(docker ps -f status=running --format='{{.Names}} ({{.Image}})' --filter=id=${DID})
  if [[ ${NAME_IMAGE} ]]; then
      echo "Connecting to:" ${NAME_IMAGE}
      docker exec -i -t ${DID} bash
  else
    echo "Failure: not a valid docker ID"
  fi
else
  echo "No active docker instances running"
fi