Interactive shell (commandline)

Sometimes it's difficult to understand problems within a docker. Like network issues or configurations that need to be adjusted. It's quite easy to log into a docker via command line. 

 1) open a command line (it can be that you need to activate SSH access) on the hosting system 

 2) find the docker image you're interested in 

 docker ps 

 3) open a shell to the docker using the id from the previous query 

 docker exec -it c05876343 /bin/bash 

 Now you should be inside the docker. To leave the session just type  

 exit