How Do You Get a Bluetooth Speaker to Work with Your Windows Laptop?

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Problem scenario
You turn on your laptop and Bluetooth wireless speaker. Your external speaker is not working. What should you do?

Possible Solution #1
Is the Bluetooth device on?

Possible Solution #2
Go to Control Panel -Hardware and Sound -Manage audio devices. Do you see a device that could be the wireless one?

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How Do You Create a docker.service File on a Linux Server?

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One of the following apply:

Problem scenario #1
You run this: “sudo systemctl start docker”
But you get this: “Failed to start docker.service: Unit docker.service not found.”

Problem scenario #2
You run this: “sudo systemctl start docker”
But you get this:
“docker.service: Service has no ExecStart=, ExecStop=, or SuccessAction=. Refusing.”
or this:
“Failed to start docker.service: Unit docker.service not found.”

Problem scenario #3
You run this: sudo systemctl enable docker
But you get this: “Failed to enable unit: Unit file docker.service does not exist.”

Solution
Use this posting.

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How Can You Test Your /etc/fstab File without Rebooting the Linux Server?

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Problem scenario
You want modified the /etc/fstab file. You want to reboot, but you are concerned your server won’t work if you accidentally had a typo in the /etc/fstab file. What should you do?

Solution

  1. Backup the /etc/fstab file somewhere (e.g., /etc/bak.fstab.bak).
  2. Run a command like this:

sudo mount -o remount,rw /dev/path/to /path/to/use

The /path/to/use is the path that you will see on your Linux system.

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Why Would You Assign or Copy a list in Python to be a set?

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Problem scenario
You are trying to understand some code. You see a variable in Python that represents a list being cast to a set.

You see something like this in a Python program:

example = [1, 1, 2, 2, 3, 3]
new_example = set(example)

You are curious why this would be done.

From the IDE you do (and see) the following:

example = [1, …

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What Does MoRef Mean or Refer to?

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Question
What does MoRef mean?

Answer
It is a portmanteau of “Managed Object Reference.” It is a data type that comes up in the context of alerts/alarms in vSphere.

(The answer was adapted from page 152 of PowerCLI Cookbook by Sellers.)

“MoRefs are unique identifiers assigned to objects at the time of their creation.” (Taken from page 202 of PowerCLI Cookbook by Sellers.)

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Does the Sport You Like Determine How Long You Will Live?

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Question
Does an athletic interest affect your life span?

Answer
Possibly. The relationship could be correlative or causal.

The expected average longevity for male athletes was 56 years for cyclists, 66 years for weightlifters, 75 years for rugby players and 92 years for golfers.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8532055/ …

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Is Kubernetes Ending Support for Docker?

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Problem scenario
You read that Kubernetes is ending support for Docker. What does this mean for Kubernetes users?

Solution
Probably nothing for most Kubernetes users. Kubernetes is going to support Open Container Initiative images.

Docker is more than a container runtime; its container runtime is containerd (according to twoardsdatascience.com). We expect containerd to be supported for a long time.

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Is There a Difference between Coding Languages and Programming Languages?

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Question
You read that there is a difference between coding languages and programming languages. What is the difference?

Answer
The question is theoretical and subjective. Sometimes diction, semantics and job descriptions are not that important.

Coding and programming are different (but there are probably very highly-paid people who disagree). It seems that in certain contexts, rightly or wrongly,

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