Network and Server Monitoring Tools

Spiceworks, Solar Winds, and Cacti are all well-known effective network monitoring tools.  A lesser known company called Lizard Systems has quality software for network monitoring. and PCworld have favorable reviews of Lizard Systems’ Network Scanner.  The Find Mac Address product has an easy installation and can find MAC addresses without network administrator rights to a given router.  For an alternative to Nagios or Sysinternals,

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Intel No Longer Provides Anti-Theft Service

While HP’s website still claims that their computers (i.e., laptops and notebooks) have the benefits of Intel AT, Intel says they stopped it in January of 2015.  See this link for more information.

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How to Install Open Source Hadoop on an Ubuntu Linux Server? (old directions)

Update 1/5/18:  These directions below are outdated.
If you are looking for the newest directions to install open source Hadoop, click here.

The directions below are left here as a reference for legacy purposes.  To install open source Hadoop on an Ubuntu server, see this article.

Previous update was on 11/7/17

Problem scenario
You want to deploy (set up and configure) Hadoop on an Ubuntu server. 

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How to Install Open Source Hadoop on an Ubuntu Linux Server?

The directions have moved (as of 1/7/18)! Click here for directions on how to install Hadoop on Ubuntu Linux.

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​How Do You Troubleshoot This Error “Docker-Engine : Depends: Libsystemd-journal0 (>= 201)”?

Problem scenario
You are trying to install docker-engine on Ubuntu Linux, but you get this error:
“docker-engine : Depends: libsystemd-journal0 (>= 201)” 

This solution assumes your Ubuntu Linux server has access to the Internet.

1.  Run this command exactly once:

echo ‘deb trusty main’ >> /etc/apt/sources.list.d/docker.list

2.  Try to install docker-engine again.

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Should the Word “internet” Be Capitalized?

Should the word “internet” be capitalized?

No.  Recently we learned that the word “internet” should be lower case.  You can learn more by going to this link.

Why Am I getting This Error “Cannot connect to the Docker daemon at unix:///var/run/docker.sock.”?

Problem scenario
You are using Linux (Ubuntu 14.04) and trying to run Docker for the first time.  You run docker ps or docker version and you see this message:

“Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?”

How do you fix this problem to get Docker to work?

Run this command:

cat /var/log/upstart/docker.log | grep -i docker | grep -i linux

If you see this: ‘ level=fatal msg=”Your Linux kernel version 2.6.32-042stab116.2 is not supported for running docker.

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How Do You Deploy a Stack (a Collection of Infrastructure Resources) with AWS CloudFormation Using the Console?

Problem scenario
You want to use CloudFormation in AWS.  You want to create a server or multiple servers with CloudFormation. How do you use CloudFormation with no CLI to create a stack (a collection of infrastructure or application resources) in AWS?

Here is a simple example to answer the question.

1.  Go to
2.  Click “Create new stack” button

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How Do You Set up (Install and Configure) AWS CloudWatch?

Update 11/22/17

Problem scenario
You want to use CloudWatch.  What steps do you need to take initially to have it work on a Linux server?

Prerequisite #1  The server must be an EC-2 instance (not a non-AWS server) with AWS CLI installed (but not necessarily configured).  For directions on installing AWS CLI, see this link.

Prerequisite #2  One of the following (a or b) must be met:

a)  AWS CLI is configured on this Linux server.

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How Do You Start an .Ova for a 64 Bit Guest Server When You Get an Error about Not Having a 64 Bit Processor?

Problem scenario:   You imported an .ova file.  But when you start the new VM (from the imported .ova file) you get this error: 

“VT-x/AMD-V hardware acceleration is not available on your system. Your 64-bit guest will fail to detect a 64-bit CPU and will not be able to boot.”

What do you do?

Root cause:  VT-x has not been enabled.

Enable VT-x. 

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