Is it Adelman or Adleman?

Question
You know about RSA (Rivest, Shamir, Adelman) encryption. Asymmetric encryption and RSA specifically are regularly used in the I.T. industry. But when you search on the internet, you find many different spellings of Adelman (such as Adleman). Which is the correct spelling?

Answer
It is Adelman. The sources include page 648 of RHCSA/RHCE Linux Certification Study Guide Sixth Edition by Jang (McGrawHill) and this external site.

How Do You Troubleshoot “TLS Error: TLS key negotiation failed to occur TLS handshake failed”?

Problem scenario
You have a Linux server with the openvpn binary command installed. You try to start the OpenVPN client service. You see this message: "TLS Error: TLS key negotiation failed to occur TLS handshake failed."

What should you do?

Solution
Reinstall and reconfigure the OpenVPN server. Just completely start over.
You may want to try this: https://www.cyberciti.biz/faq/howto-setup-openvpn-server-on-ubuntu-linux-14-04-or-16-04-lts/

Helping a Loved One Through the Challenges of an Autoimmune Disease

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Helping a Loved One Through the Challenges of an Autoimmune Disease

This post below was contributed by fitshiela.com.

Autoimmune diseases impact at least 50 million Americans according to the American Autoimmune Related Diseases Association. As of now, more than 80 chronic illnesses are considered autoimmune, and the number keeps rising.

If you have a loved one who lives with an autoimmune disease, there are practical ways to help them lead a higher quality of life. You may not understand completely what they’re going through each day, but you can learn about their condition and take simple steps to support them.

Creating a Healthy Home 

Your loved one’s living environment will play a critical role and their overall health and well-being. A dirty and cluttered home will increase stress and could even exacerbate symptoms of their autoimmune disease.

Think of ways that you can promote peace and positive energy, and help your loved one improve their environment. Kicking the clutter out is an excellent start, and, as Elemental.Green points out, adding more natural light and air-purifying houseplants can also boost energy.

Carving Out a Home Office     

If your loved one works from home, you could help them create a home office that allows them to work productively and comfortably. It can be challenging to maintain a steady schedule when working from home, and without good planning, the stress can quickly mount. Help your loved one evaluate their home to see where they could fit a home office that helps them to minimize distractions and stay on task. If they already have an office set up, look for ways to improve it.

For example, maybe you could add LED task lighting to help reduce eyestrain and boost concentration. Or, maybe you could help your loved one choose the right productivity tools so that they can work faster and more efficiently. Moreover, make sure they have ergonomic furniture and equipment to keep them healthy on long workdays.

Eating a Nutritious Diet        

Many people living with an autoimmune disease deal with inflammation, and it's often because of their diet. If your loved one does not eat a strategic diet, learn what foods could help their digestive tract and reduce inflammation. For example, leafy greens, broccoli, cauliflower, turmeric, and berries are all proven to minimize inflammation. Plus, they can improve your overall health.

Sleeping Well

Sleeping eight hours a night is critical when you live with an autoimmune disease. Poor sleep can do a number on your health by damaging your metabolism, increasing unhealthy cravings, and harming concentration and self-awareness.

Of course, the autoimmune disease itself could make it challenging to acquire adequate sleep. Look for relaxing activities your loved one can do at night to wind down and get the rest they need. 

Insomnia is often untreated, and there are different types (difficulty initiating sleep or maintaining sleep).  Insomnia can be treated by different types of light therapy (with more or less blue light early or late in a person’s day depending on the type of insomnia the person has).

Exercising Regularly       

Exercising consistently can do wonders for reducing inflammation in the body. This doesn't mean you need to invest in expensive gym equipment or memberships. Simply remind your loved one to move their body throughout the day, even if it's taking the stairs instead of the elevator or parking a bit further away. You could even go for daily walks or jogs with them to keep each other company and fit!

Increase Your Health-Based Knowledge: Get an Online Degree

One way to be even more informed about autoimmune diseases and other health-related matters, you can even get a formal education to boost your own knowledge, which in turn can be used to help your loved one. Pursuing a nursing degree could give you a deeper understanding of what ails them and how to best treat their condition. The online option for getting a bachelor’s or master’s in nursing is convenient (you can complete coursework wherever you have an internet connection) and affordable (tuition at traditional brick-and-mortar campuses is often much more expensive). Completing your degree from home could also assist you help your loved one as needed.

If you have a close friend or family member who has been diagnosed with an autoimmune disease, you can make a significant impact on their life by taking practical steps to support their health and well-being. Keep the tips above in mind as you come up with a plan – including creating a healthy home, eating right, exercising, and even getting a nursing degree – and keep looking for other ways to help your loved one through the challenges they face. Not only will you help them lead happier, more fulfilling lives, but it can take your relationship to a deeper place!

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An aside from continualintegration.com: While some sources disagree with formal education helping a student learn, some careers legally require formal education.  The rigor and costs of the academia may far outweigh the benefits.

This article was brought to you by fitsheila.com (as the primary author).

Using Ubuntu How Do You Make a USB Stick with an .iso (for Installing an OS) Bootable?

Problem scenario
You are using Ubuntu with a desktop GUI. You want to create a USB stick with an .iso file to install Linux on some hardware elsewhere. What should you do?

Solution
Remove USB sticks from your computer that will not get the ISO. Why? You may accidentally overwrite one of them.

From the GUI desktop go to the Menu and search for "USB." You may find "USB Image Writer" or "Startup Disk Creator". It is fairly self-explanatory how to use "Startup Disk Creator."

If you want information on how to use "USB Image Writer," see this: https://linuxmint-installation-guide.readthedocs.io/en/latest/burn.html

A Budget-Friendly Resource Guide to Tech Investments for Solopreneurs

Image via Pexels. Article brought to you by Techdeck.info.

A Budget-Friendly Resource Guide to Tech Investments for Solopreneurs

If you're a small business owner or solopreneur, keeping overhead costs low is probably a priority. While it's understandable to save where you can, one area you shouldn't skimp on is technology. The right tech investments can help streamline your business operations, saving you time, stress, and money. Discover essential technologies and how to save money on them with this resource guide.

Identify What Technology You Might Benefit From

Understanding the benefits of different technologies will help you decide how to spend your tech budget.

  • Shop around for project management software, which can help you keep track of deliverables and timelines.
  • Time management tools like ActiveCollab and ProofHub can help you save time on the job, boosting productivity.
  • Capitalize off of automation tools, which save you time by taking care of mundane tasks, like social media posting, for you.
  • Also, consider common apps used by solopreneurs, like Todoist and Zapier.

Take Advantage of Free and Reduced Rates on Technology When You Can

You don't have to spend big bucks to benefit from the latest tech. These resources can help.

  • Try out complementary tools when possible, like this free tool to convert PDF to JPG.
  • Keep an eye out for tech deals on major shopping days like Cyber Monday and Black Friday.
  • Sign up for newsletters that give you alerts on the latest tech deals.
  • Check out free security tools that can help keep your hardware and software safe.

Implement Your Tech Strategically to Make the Most of Your Investment

Follow these recommended practices to ensure your money has been well spent.

  • When using a free trial, ask critical queries, like how you can optimize the product. This will help determine if it's worth buying.
  • Once you download software, make sure to update it regularly. Security patches and updates help keep it running optimally.
  • Conduct regular technology audits to make sure you're still using all your tools and that they're up-to-date and secure.
  • Educate yourself about tech topics, such as continual integration, to make sure you understand the field and are up-to-date on the latest.

Technology can help solopreneurs and small business owners in many ways. The key to success is identifying which tech tools are worth spending on—and planning your budget accordingly. Trust the resources above to help.

Disclosure

This article was brought to you by Techdeck.info.

Where Is the core-site.xml File in a Hadoop Installation?

Problem scenario
You downloaded and installed Hadoop core. But you cannot find the core-site.xml file. What should you do?

Possible Solution #1
Run this: sudo find / -name core-site.xml

Possible Solution #2
Did you download the installation media with a file "-site" in its name?

Try again with a .tar.gz file without "-site" (and without "-src") in its name:
https://dlcdn.apache.org/hadoop/core/stable/

(This is the for open source version and not a specific vendor's implementation of Hadoop.)

How Do You Troubleshoot “Segmentation fault” Errors in Hadoop/HDFS?

Problem scenario
You get a "Segmentation fault" or "Segmentation fault (core dumped)" error when you run any "hdfs" command. What should you do?

Solution

Root cause
There is probably an infinite loop/recursion problem. (Segmentation faults involve writing to the stack. Eventually the memory gets filled up.) There is some configuration problem with your Hadoop / hdfs installation. If the installation used to work, look at backup configurations in Git. If it never worked, this problem will not be easy to correct/fix.

Possible solution
Reinstall Hadoop.

(This is the for open source version and not a specific vendor's implementation of Hadoop.)

For Databases Is a B-Tree the Same as an Index?

Question
In the context of databases, Is a B-tree the same as an index?

Answer
For many intents and purposes they are the same.

"B-Tree is a self-balancing search tree." Taken from
https://www.geeksforgeeks.org/introduction-of-b-tree-2/.

"B-tree is a data structure that store data in its node in sorted order." Taken from https://dzone.com/articles/database-btree-indexing-in-sqlite.

This source says that the "B" stands for "balanced" (not "binary"): https://use-the-index-luke.com/sql/anatomy/the-tree

To learn more see this: https://www.geeksforgeeks.org/difference-between-binary-tree-and-b-tree/