A Technical I.T./DevOps Blog
Question
What are the drawbacks of using WordPress when you want syntax highlighting for code in your blog?
Answer
1. When you paste PHP code, it will disappear. In Weebly for example, you can paste PHP code and there will be no automatic elimination of it. In Weebly, the PHP code remains as text. You have to get used to this.
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Continue reading “What Are The Disadvantages of Using WordPress for a Programming Blog?”
Problem scenario
You want to utilize SonarQube to do some analysis of some code. What do you do?
Solution
Prerequisites
This assumes you have SonarQube and SonarQube Scanner (aka sonar-scanner) installed. If you need assistance with either of these, see this link to install SonarQube or this link to install sonar-scanner.
Procedures
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Problem scenario
One of the below three situations describes your problem:
#1 You insert a USB stick and nothing happens. You know the USB sticks work with other computers.
OR
#2 You insert a USB stick and nothing happens for a while. There is a long delay. You know the USB sticks work fine with other computers.
OR
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Problem scenario
You are using Ansible’s find module. You want it to find the destination of a symbolic link. When you run the playbook you have a way of finding what the find module returns. It is saying something about “directory was skipped as it does not seem to be a valid directory or it cannot be accessed.” What should you do?
Solution
Use the stat module.
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Problem Scenario
You want to install the Kerberos KDC server on a Red Hat derivative of Linux. You want to test it out with a second Red Hat distribution of Linux server as a client of the Kerberos centralized authentication server. What do you do?
Solution
Prerequisites
Ensure the Kerberos authentication server can receive inbound connections over ports 88,
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Problem scenario
You want to install Foreman on a RHEL server. What should you do?
Solution
Warning
If you install this on a server that is already a Puppet master server, your site.pp file will be overwritten.
Procedures
Tips: With EC-2 instances, you can usually skip to step #3.
1.
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Continue reading “How Do You Install Foreman on a RHEL Server?”
Problem scenario
You want to write a Python program with a bound method. What should you do?
Solution
This program uses a bound method. The method funtest() is bound to objects that are members of the class “widgetfactory”. You cannot use the method without it being bound to this class. (If you uncomment out the last line, you’ll see it is a bound method and not an unbound method;
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Question
You have heard of the term daemon when it refers to a process, service or listener of an OS. Where did this term come from?
Solution
According to page 440 of A Practical Guide to Fedora and RedHat Enterprise Linux by Sobell, the terms daemon, service and server are all interchangeable. Demons are invisible presences like spirits. The term “daemon” is Latin and is pronounced exactly the same as “demon” according to Dictionary.com.
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The Union victory of the Civil War forced the southern states back into the Union under its jurisdiction. On February 1, 1865 President Lincoln signed a resolution permanently outlawing slavery in the U.S. (www.timeanddate.com).
This resolution became the 13th amendment which was ratified later that year after Lincoln’s death (www.timeanddate.com).
A former slave named Richard Wright became a successful businessman in Philadelphia in the 1900s (http://www.americaslibrary.gov/es/pa/es_pa_free_1.html).
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Problem scenario
You want to get inside a Docker container that is running. You are on the Docker host. What should you do?
Solution
1. Run this command: docker ps -a # Find the container ID in the output
2. Run this command but substitute abcd1234 with the container ID found above:
docker exec -it abcd1234 bash
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Continue reading “How Do You Enter a Docker Container That is Currently Running?”