A Technical I.T./DevOps Blog
Problem scenario
You are using Linux SUSE. You want to configure a new repository for your Linux server to pull from. You have a new .repo file drafted out. Where should this file go?
Solution
/etc/zypp/repos.d/
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Continue reading “What Directory in the OS Are the .Repo Files in Linux SUSE?”
Problem scenario
You want to install a C++ compiler in Ubuntu. You want to write a basic C++ program and run it. How do you do these things?
Solution
1. As root, install a C++ compiler with this command:
apt install g++
2. Create a basic program. Here is an example. Name this file hello.cpp and put this as the content:
#include <iostream>
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Continue reading “Using Ubuntu, How Do You Install a C++ Compiler and Run a Basic C++ Program?”
Problem scenario
You want to deploy Docker to Ubuntu Linux using Puppet. How do you write a manifest to install Docker an Ubuntu server?
Solution
This solution demonstrates transferring a file with Puppet.
1. Install Puppet master on an Ubuntu Server. See this link if you want directions.
2. Install Puppet agent on a different Ubuntu server. See this
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Continue reading “How Do You Deploy Docker to Ubuntu Linux Servers Using Puppet?”
Problem scenario
You want to use Puppet to deploy Docker to a RHEL server in AWS. How do you do this?
Solution
Warning: This may not work for Puppet versions 5 or higher. It should work for Puppet version 4 or lower. This solution is not a best practice. It is quick way to deploy a version of Docker made for CentOS to RHEL instances.
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Continue reading “How Do You Deploy Docker to RedHat Linux Servers Using Puppet?”
Problem scenario
When replacing an aerator to a kitchen or bathroom sink, you cannot easily install a new one. What is the problem?
Possible solution #1
There is a gasket attached to the new aerator that needs to be removed.
Possible solution #2
The new aerator is a male aerator and you need a female aerator.
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Update on 12/4/17
If you want to install Puppet Agent 5.x (a much newer version), see this posting instead.
Problem scenario
You installed Puppet Master on an AWS instance of RedHat Enterprise Linux. (See this link if you want to install Puppet Master). You now want another AWS instance of RHEL 7.x to be configured as a Puppet Agent node. You want to run a manifest to make sure that this new Puppet Agent node (i.e.,
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Continue reading “How Do You Deploy Puppet Agent 3.x to a RedHat Linux Instance in AWS?”
Problem scenario
You want to install Puppet Master on RHEL 7.x running in AWS. You only have five minutes to complete this task. How do you install Puppet Master immediately?
Solution
1. Create puppetinstaller.sh in the /tmp directory. It should have the following lines (stop before you get to step #2):
#!/bin/bash
# Written by continualintegration.com
yum -y install ntp
echo ‘
server 0.us.pool.ntp.org
server 1.us.pool.ntp.org
server 2.us.pool.ntp.org
server 3.us.pool.ntp.org’ >>
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Continue reading “How Do You Install Puppet Master on a RedHat Linux Server (an AWS Instance)?”
Problem scenario
You try this command from the Puppet Master server:
service puppetserver restart
But you get this error:
“Failed to restart puppetserver.service: Unit puppetserver.service not found.”
What should you do?
Solution
Do not use “puppetserver” in the command. The correct command is:
service puppetmaster restart
[Sassy_Social_Share]Problem scenario
In a PHP “submit form” you have various fields. Two of the fields are on the same row. That is, when you open the page with a web browser, two input box fields are the same distance from the top and bottom of the page. You want each field to be on its own line. How do you do you get the PHP form to render the way you want?
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Continue reading “How Do You Get PHP to Have a Separate Line for an Input Field in a Submit Form?”
Problem scenario
Using different package managers can lead to dependencies being met while systems administrators will encounter error messages that detect, find or determine something to the contrary (e.g., false unmet dependency errors or conditions). Some enterprise policies disallow the pip command. How do you set up the AWS CLI on a Linux server without the pip command?
Solution (Part 1 and Part 2)
Prerequisites
i.
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