function dbash() { docker exec -it "$1" bash; }\r
_dbash() { cur="${COMP_WORDS[COMP_CWORD]}"; __docker_complete_containers_running; }\r
complete -F _dbash dbash\r
+\r
+# automatically login as www-data user\r
+function dbashwww() { docker exec -it "$1" su -s /bin/bash www-data; }\r
+complete -F _dbash dbashwww\r