dc pull adosztal/net_toolbox:latest      ----------username/password ---- root/gns3
docker pull gns3/ubuntu
 $docker pull trexcisco/trex
 $docker run --rm -it --privileged --cap-add=ALL trexcisco/trex:latest
 $root@]./t-rex-64 -i
To expose the ports to GUI:
 $docker pull trexcisco/trex
 $docker run --rm -it --privileged --cap-add=ALL -p 4500:4500 -p 4501:4501 -p
4507:4507 trexcisco/trex:latest
 $root@]./t-rex-64 -i
dc pull gns3/network_automation