A Technical I.T./DevOps Blog
Question
You have heard about Azure’s Logic Apps. What are they and what do they do?
Answer
Azure Logic Apps are a PaaS solution. Logic Apps execute in response to a triggering event (e.g., recurring on a schedule based on time, receiving a REST API call, or a Tweet being posted). They initiate a variety of different tasks as you can determine the OS architecture (either Windows or Linux) without having to manage that same OS.
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Problem scenario
You want to install Redis on RedHat Enterprise Linux 7.x. (Redis gets its name from “REmote DIctionary Server” according to this external link. It is one of the most popular NoSQL solutions on the market according to G2 Crowd.) What do you do to install Redis on a RHEL server?
Solution
Prerequisite
This solution requires wget.
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Updated on 5/14/20 with a minor update on 11/13/21
Problem scenario
You want to install Apache Zookeeper with a script. You want the same script to work regardless of what distribution of Linux you are using (e.g., Ubuntu/Debian, RedHat (including CentOS/Fedora), or SUSE). How do you write a script to install the latest version of Zookeeper?
Solution
The file that is attached called zki.txt is not needed but is attached as a reference copy of the below.
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Continue reading “How Do You Install Zookeeper on Any Type of Linux?”
Problem scenario
You want to program in the C programming language on a Linux server. How do you code in C and test your programs?
Solution
Overview
Install the C compiler.
Procedures
1. To find your distribution of Linux run this command: cat /etc/*-release | grep -i pretty
2. Find the one option of the below three that applies to your Linux:
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Continue reading “How Do You Install a C Compiler on Linux?”
Problem scenario
No repositories are configured on your Linux SUSE server. You want to install packages. You cannot use zypper commands to install Linux utilities or other packages. You want to know how to you use SUSE direct address XML files to install packages. You think these XML files could help. When zypper commands fail because a repository has never been configured on Linux SUSE, how do you begin to install packages?
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Continue reading “How Do You Get Zypper Commands to Work to Install Packages on SUSE?”
A Practical Guide to Continuous Delivery by Eberhard Wolff
Automation through Chef Opscode: A Hands-on Approach to Chef by Navin Sabharwal and Manak Wadhwa
Chef Essentials by John Ewart
Chef Cookbook – Third Edition by Matthias Marschall
Chef Infrastructure Automation Cookbook – Second Edition by Matthias Marschall
Chef Server on AWS (AWS Quick Start) by AWS Whitepapers and Amazon Web Services
Configuration Management with Chef-Solo by Naveed ur Rahman
Customizing Chef: Getting the Most Out of Your Infrastructure Automation by Jon Cowie
Exploration of Chef: Fast And Easy Learning!
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Problem scenario
You want to monitor Docker containers. Therefore you want to install Sysdig to try it out. How do you pull down a Docker container that has Sysdig installed in it?
Solution
Prerequisites
Docker needs to be installed. If you need to install Docker on a CentOS/RedHat/Fedora distribution, see this posting. If you need to install Docker on a Debian/Ubuntu,
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Continue reading “How Do You Install Sysdig in a New Docker Container to Try It Out?”
Problem scenario
You want to have your Google Cloud Platform servers be ready for what you consider to be “regular” usage. What should you do to get a server to be ready for these four things listed below?
1. Able to SSH into it via Putty with a non-root user.
2. Able to sudo with this non-root user.
3. Files when modified in vi in “insert mode” can to receive clipboard-copied content with a right-click of a mouse.
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Problem scenario
You are managing a Puppet master server. You want to find where the site.pp file should be. Where do you look to determine the configuration?
Solution
The result of this command is the canonical answer:
puppet master –configprint manifest
If the above returns “No manifest”, then run this command:
sudo puppet master –configprint all | grep basemodule
One of the paths resulting from the above command could be the answer to your question.
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Question
There are five technology-related concepts called “Redshift” or “red shift.” What is the difference between them?
Answer
We hope to provide a thorough disambiguation of the term “Redshift” or “red shift.”
In physics we know that visible light has a wavelength. Depending on the color we see, the wavelength can be longer or shorter than others. The longest wavelength is red (according to this page https://socratic.org/questions/what-color-of-light-has-the-longest-wavelength).
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