Various Linux things

If you want to bind to the redis port from your nodejs container you will have to expose that port in the redis container:

version: '2'
services:
  nodejs:
    build:
      context: .
      dockerfile: DockerFile
    ports:
      - "4000:4000"
    links:
      - redis
  redis:
    build:
      context: .
      dockerfile: Dockerfile-redis
    expose:
      - "6379"
The expose tag will let you expose ports without publishing them to the host machine, but they will be exposed to the containers networks.

ok, so for debian/ubuntu images don't really need autoclean – it's already run automatically

In general, to detach from a Docker container and leave it running, we can use the CTRL-p CTRL-q key sequence.

https://github.com/bcicen/ctop

logs – for individual jobs you can see them via status (or sdj)
presistent is not showing anythin by default?

• AssertPathExists fails if the pass is missing or symlink is broken
  

sudo ss -tulpn | grep 5060
sudo ss -anpt  | grep 8640

netcat -l 5559

one the other machine

echo "TEST" | netcat host 5559

Nice and verbose! From the man pages.
Single port:
nc -zv 127.0.0.1 80

testing if port is open

grep cron /var/log/syslog
tail -f /var/log/syslog | grep cron

*:* TestJob; cron command

mind the space after colon!

• doesn't require root!
  
• firejail --noprofile --net=none