The directions have moved (as of 1/7/18)! Click here for directions on how to install Hadoop on Ubuntu Linux.
…
Continue reading “How to Install Open Source Hadoop on an Ubuntu Linux Server?”
Problem scenario
You are trying to install docker-engine on Ubuntu Linux, but you get this error:
“docker-engine : Depends: libsystemd-journal0 (>= 201)”
Solution
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.
…
Question
Should the word “internet” be capitalized?
Answer
No. Recently we learned that the word “internet” should be lower case. You can learn more by going to this link.
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?
Solution
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.
…
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?
Solution
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.
…
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?
Solution
Prerequisites
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.
…
Continue reading “How Do You Set up (Install and Configure) AWS CloudWatch?”
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.
Solution
Enable VT-x.
…
Problem Scenario: You use Lynx to browse the web. You want to see the complete URL when using Lynx (e.g.,for posterity) of a given web page. What do you do?
Solution
1. Use Lynx and browse to a given web page. Browse as normal and stop when you are on the page for which you want to find the URL.
2. Type “o” (with no quotes).
…
Continue reading “When Using Lynx, How Can You See the Underlying URL?”
Problem scenario: Using Oracle VirtualBox on a 64 bit version of Windows, you go to create a new virtual machine as a guest server. You want it to run a 64 bit version of Linux. You start to build the new machine using Oracle VirtualBox. You choose the “Version” and only see 32 bit options. You have a processor (hardware) that is 64 bit. The Windows OS is 64 bit. But you do not see 64 bit options for the OS choices.
…
Problem scenario: The Internet seems sluggish and unreliable when using Firefox on Windows 7. You Internet speed is medium slow, and your laptop has decent hardware specifications by 2017 standards. What can you do?
Solution: Use Chrome. You can download it here.
Our research and investigation has confirmed that Chrome will be faster. There are other reasons besides speed for choosing different web browsers.
…
Continue reading “How Can Web Browsing Be Sped up (or Quickened) When Using Windows 7?”