So I could get my container to communicate with the outside world.
Made a second container - - - impressed with the very light footprint.
Want to experiment with a LAPP server so first item I installed is postgresql.
Tried to install postgresql10.1 from source but couldn’t get the service to start.
Installed posgresql9.6 from the repository I’m using.
In the process of configuration it is necessary to switch back and forth from user postgres to the system user.
On a ‘regular’ system installation I would switch from postgres to user using su (postgres$ su being the most common).
That does not work in the container.
How does one switch from user ‘postgres’ to ‘user’?