I needed to run a quick test on a virgin Linux system.

Rather than spinning up a virtual machine, I just ran a single Docker command, and was up and running.

docker run -it --entrypoint "/bin/bash" ubuntu:latest

That's it. Really, it's that simple.

From the Docker docs:

An ENTRYPOINT allows you to configure a …

I was on my mobile, looking up a few recipes, I was amazed at the number of intrusive ads I was getting, which made reading the web pages almost impossible.

Decided it was time to investigate Pi-hole, as I'd heard good things about it.

The Pi-hole is a DNS sinkhole that protects your devices from unwanted content, …

Damn, that was a long, drawn out title….

Basics:

• As of this writing, I’m running TrueNAS 12.2

• While I really like TrueNAS, TrueNAS/FreeNAS doesn't support Docker containers.

• The TrueNAS team is working on TrueNAS SCALE, which is Linux-based, and support Docker containers, but it’s still in alpha.

• Once TrueNAS …

By default Docker needs to be run as the root user.

Not practical or advisable in a production, or shared system to be consistently logged in as root (think running with scissors).

Out of the box, attempting to run Docker as a non-root user gets this error:

whoami
tom

docker run hello-world
docker: Got permission …

Doing some lab testing, and needed to add another interface on an Ubuntu server virtual machine.

Quickly added it via the host (TrueNAS), but it came unconfigured and uninitialized.

The interface is in a down state, so it doesn't show up in ifconfig without using a switch:

ifconfig
enp0s4: flags=4163< …

I wanted to use a VPN on a Linux server (Ubuntu), using Private Internet Access, but without using the PIA client.

Steps

1. Install OpenVPN (I also install curl and net-tools, as I frequently use both):

   sudo apt-get install openvpn curl net-tools
   

2. Get necessary OpenVPN files from Private Internet Access, and copy local …