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. Techworld.com 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,
Update 1/5/18: These directions below are outdated.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
You want to deploy (set up and configure) Hadoop on an Ubuntu server.
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 http://cz.archive.ubuntu.com/ubuntu trusty main’ >> /etc/apt/sources.list.d/docker.list
2. Try to install docker-engine again.
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.
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 https://console.aws.amazon.com/cloudformation/home
2. Click “Create new stack” button
3. Click the drop down menu option below “Select a sample template” and under “Single instance samples” choose “LAMP Stack”.
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.
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.