Linux Unix Training Classes in Nashville, Tennessee

Learn Linux Unix in Nashville, Tennessee and surrounding areas via our hands-on, expert led courses. All of our classes either are offered on an onsite, online or public instructor led basis. Here is a list of our current Linux Unix related training offerings in Nashville, Tennessee: Linux Unix Training

We offer private customized training for groups of 3 or more attendees.
Nashville  Upcoming Instructor Led Online and Public Linux Unix Training Classes
Enterprise Linux System Administration Training/Class 28 July, 2025 - 1 August, 2025 $2190
HSG Training Center instructor led online
Nashville, Tennessee 37205
Hartmann Software Group Training Registration
Linux Fundaments GL120 Training/Class 22 September, 2025 - 26 September, 2025 $2090
HSG Training Center instructor led online
Nashville, Tennessee 37205
Hartmann Software Group Training Registration
LINUX SHELL SCRIPTING Training/Class 3 September, 2025 - 4 September, 2025 $990
HSG Training Center instructor led online
Nashville, Tennessee 37205
Hartmann Software Group Training Registration
OpenShift Fundamentals Training/Class 6 October, 2025 - 8 October, 2025 $2090
HSG Training Center instructor led online
Nashville, Tennessee 37205
Hartmann Software Group Training Registration
RED HAT ENTERPRISE LINUX AUTOMATION WITH ANSIBLE Training/Class 15 September, 2025 - 18 September, 2025 $2735
HSG Training Center instructor led online
Nashville, Tennessee 37205
Hartmann Software Group Training Registration
RED HAT ENTERPRISE LINUX SYSTEMS ADMIN I Training/Class 3 November, 2025 - 7 November, 2025 $2090
HSG Training Center instructor led online
Nashville, Tennessee 37205
Hartmann Software Group Training Registration
RED HAT ENTERPRISE LINUX SYSTEMS ADMIN II Training/Class 18 August, 2025 - 21 August, 2025 $1890
HSG Training Center instructor led online
Nashville, Tennessee 37205
Hartmann Software Group Training Registration
RHCSA EXAM PREP Training/Class 17 November, 2025 - 21 November, 2025 $2090
HSG Training Center instructor led online
Nashville, Tennessee 37205
Hartmann Software Group Training Registration
DOCKER WITH KUBERNETES ADMINISTRATION Training/Class 21 July, 2025 - 25 July, 2025 $2490
HSG Training Center instructor led online
Nashville, Tennessee 37205
Hartmann Software Group Training Registration

View all Scheduled Linux Unix Training Classes

Linux Unix Training Catalog

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DevOps Classes

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Foundations of Web Design & Web Authoring Classes

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Java Programming Classes

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Gain insight and ideas from students with different perspectives and experiences.

Blog Entries publications that: entertain, make you think, offer insight

The original article was posted by Michael Veksler on Quora

A very well known fact is that code is written once, but it is read many times. This means that a good developer, in any language, writes understandable code. Writing understandable code is not always easy, and takes practice. The difficult part, is that you read what you have just written and it makes perfect sense to you, but a year later you curse the idiot who wrote that code, without realizing it was you.

The best way to learn how to write readable code, is to collaborate with others. Other people will spot badly written code, faster than the author. There are plenty of open source projects, which you can start working on and learn from more experienced programmers.

Readability is a tricky thing, and involves several aspects:

  1. Never surprise the reader of your code, even if it will be you a year from now. For example, don’t call a function max() when sometimes it returns the minimum().
  2. Be consistent, and use the same conventions throughout your code. Not only the same naming conventions, and the same indentation, but also the same semantics. If, for example, most of your functions return a negative value for failure and a positive for success, then avoid writing functions that return false on failure.
  3. Write short functions, so that they fit your screen. I hate strict rules, since there are always exceptions, but from my experience you can almost always write functions short enough to fit your screen. Throughout my carrier I had only a few cases when writing short function was either impossible, or resulted in much worse code.
  4. Use descriptive names, unless this is one of those standard names, such as i or it in a loop. Don’t make the name too long, on one hand, but don’t make it cryptic on the other.
  5. Define function names by what they do, not by what they are used for or how they are implemented. If you name functions by what they do, then code will be much more readable, and much more reusable.
  6. Avoid global state as much as you can. Global variables, and sometimes attributes in an object, are difficult to reason about. It is difficult to understand why such global state changes, when it does, and requires a lot of debugging.
  7. As Donald Knuth wrote in one of his papers: “Early optimization is the root of all evil”. Meaning, write for readability first, optimize later.
  8. The opposite of the previous rule: if you have an alternative which has similar readability, but lower complexity, use it. Also, if you have a polynomial alternative to your exponential algorithm (when N > 10), you should use that.

Use standard library whenever it makes your code shorter; don’t implement everything yourself. External libraries are more problematic, and are both good and bad. With external libraries, such as boost, you can save a lot of work. You should really learn boost, with the added benefit that the c++ standard gets more and more form boost. The negative with boost is that it changes over time, and code that works today may break tomorrow. Also, if you try to combine a third-party library, which uses a specific version of boost, it may break with your current version of boost. This does not happen often, but it may.

Don’t blindly use C++ standard library without understanding what it does - learn it. You look at std::vector::push_back() documentation at it tells you that its complexity is O(1), amortized. What does that mean? How does it work? What are benefits and what are the costs? Same with std::map, and with std::unordered_map. Knowing the difference between these two maps, you’d know when to use each one of them.

Never call new or delete directly, use std::make_unique and [cost c++]std::make_shared[/code] instead. Try to implement usique_ptr, shared_ptr, weak_ptr yourself, in order to understand what they actually do. People do dumb things with these types, since they don’t understand what these pointers are.

Every time you look at a new class or function, in boost or in std, ask yourself “why is it done this way and not another?”. It will help you understand trade-offs in software development, and will help you use the right tool for your job. Don’t be afraid to peek into the source of boost and the std, and try to understand how it works. It will not be easy, at first, but you will learn a lot.

Know what complexity is, and how to calculate it. Avoid exponential and cubic complexity, unless you know your N is very low, and will always stay low.

Learn data-structures and algorithms, and know them. Many people think that it is simply a wasted time, since all data-structures are implemented in standard libraries, but this is not as simple as that. By understanding data-structures, you’d find it easier to pick the right library. Also, believe it or now, after 25 years since I learned data-structures, I still use this knowledge. Half a year ago I had to implemented a hash table, since I needed fast serialization capability which the available libraries did not provide. Now I am writing some sort of interval-btree, since using std::map, for the same purpose, turned up to be very very slow, and the performance bottleneck of my code.

Notice that you can’t just find interval-btree on Wikipedia, or stack-overflow. The closest thing you can find is Interval tree, but it has some performance drawbacks. So how can you implement an interval-btree, unless you know what a btree is and what an interval-tree is? I strongly suggest, again, that you learn and remember data-structures.

These are the most important things, which will make you a better programmer. The other things will follow.

One of the biggest challenges faced by senior IT professionals in organizations is the choice of the right software vendor. In the highly competitive enterprise software industry, there are lot of vendors who claim to offer the best software for the problem and it can be really daunting to narrow down the best choice. Additionally, enterprise software costs can often run into millions of dollars thereby leaving very little margin of error. The real cost of choosing a wrong software can often result into losses much more than the cost of the software itself as highlighted by software disasters experienced by leading companies like HP, Nike etc. In such a scenario, senior IT professionals despite years of expertise can find it very difficult to choose the right business software vendor for their organization.

Here are some of the proven ways of short-listing and selecting the right business software vendor for your organization,

·         Understand and Define The Exact Need First: Before embarking on a journey to select the software vendor, it is critical to understand and define the exact problem you want the software to solve. The paramount question to be asked is what business objective does the software need to solve. Is the software required to “reduce costs” or is it to “improve productivity”? Extracting and defining this fundamental question is the bare minimum but necessary step to go searching for the right vendor. It will then form the basis of comparing multiple vendors on this very need that your organization has and will help drive the selection process going forward. The detailed approach involves creating a set of parameters that the software needs to meet in order to be considered. In fact, consider categorizing these parameters further in “must-haves”, “good to have” etc. which will help you assign relevant weights to these parameter and how the software’s fare on each of these parameters

·         Building The List of Vendors Who Meet The Need: Once you have defined your need and distilled that need into various parameters, it’s time to built the list of vendors who you think will meet the need. This is akin to a lead generation model wherein you want to identify a large enough pool and then filters your list down to the best ones. There are multiple ways of building a list of vendors and more often than not, you must use a combination of these methods to build a good enough list.

o   Use Industry Reports: We discussed the IT intelligence offered by leading industry firms Gartner and Forrester in How To Keep On Top Of Latest Trends In Information Technology. These firms based on their access to leading software vendors and CIO network publish vendor comparison research reports across specific verticals as well as specific technologies. Gartner’s Magic Quadrant and Forrester’s Wave are a very good starting point to get an insight into the best software vendors. For example, if you were looking for a CRM solution, you could look for Gartner’s Magic Quadrant for CRM and look at the vendors that make the list. These reports can be pricey but well worth the money if you are going to invest hundreds of thousands in the software. Having said that, you don’t have to trust these report blindly because how these firms define the best software may not match how you define the best software for your organization

o   Competitive Intelligence: If you are a smart professional, you are already keeping tabs of your competition. Chances are that if you are a big organization, you might see a Press Release either from your competitor or their vendor announcing the implementation of new software. Extrapolate that across 5-10 key competitors of yours and you might discover the vendors that your competitors are choosing. This gives you a good indicator that the vendors used by your competitors must be offering something right.

In May 2012 Google Chrome hit a milestone. It kicked Microsoft's Internet Explorer into excess phone oh that oh that second place as the most used browser on planet Earth.
With Microsoft being in second place, it makes a dark hole for Firefox coming in at number three. Google likes to trumpet three key reasons: security, simplicity and speed.
Available for free on Android, Linux, Mac, and Windows. It gets its speed from the open source JavaScript engine written in C++ known as V8.
In my daily use I use Microsoft's Internet Explorer version 10, Apple's Safari (on OS X) and chrome on both Windows 8 and OS X.

Admittedly people do not know anything about Internet Explorer version 10 since you can only get it on Windows 8/RT.

I do not need a crystal ball to know that the Mother of All Browser Battles is set to begin in the fall of 2012 and beyond.

I have said this before and I'm going to say it again.

Net Neutrality

You may have heard about net neutrality over the years. Recently, the concept has gone through some changes, and many would consider its underlying principles to be in danger of corruption or dissolution. However, the technical nature of net neutrality ethics makes it difficult to understand for the layperson. Read on, and the central themes and controversies surrounding the principle will be outlined and explained for your convenience.

The Theme

Tech Life in Tennessee

Tennessee has played an important role in the development of many forms of American popular music. Bristol is known as the birthplace of country music while Memphis is considered by many to be the birthplace of the blues. Tennessee is a right to work state, as are most of its Southern neighbors. Major corporations with headquarters in Tennessee include FedEx Corporation, AutoZone Incorporated and International Paper
Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live. Martin Golding
other Learning Options
Software developers near Nashville have ample opportunities to meet like minded techie individuals, collaborate and expend their career choices by participating in Meet-Up Groups. The following is a list of Technology Groups in the area.
Fortune 500 and 1000 companies in Tennessee that offer opportunities for Linux Unix developers
Company Name City Industry Secondary Industry
First Horizon National Corporation Memphis Financial Services Lending and Mortgage
Vanguard Health Systems, Inc. Nashville Healthcare, Pharmaceuticals and Biotech Hospitals
The ServiceMaster Company Memphis Consumer Services Consumer Services Other
Eastman Chemical Company Kingsport Manufacturing Chemicals and Petrochemicals
Brookdale Senior Living, Inc. Brentwood Healthcare, Pharmaceuticals and Biotech Residential and Long-Term Care Facilities
Scripps Networks Interactive Knoxville Media and Entertainment Radio and Television Broadcasting
Dollar General Corporation Goodlettsville Retail Retail Other
IASIS Healthcare Corporation Franklin Healthcare, Pharmaceuticals and Biotech Hospitals
Thomas and Betts Corporation Memphis Energy and Utilities Gas and Electric Utilities
Tractor Supply Company, Inc. Brentwood Retail Clothing and Shoes Stores
TeamHealth, Inc. Knoxville Healthcare, Pharmaceuticals and Biotech Doctors and Health Care Practitioners
UNIVERSITY HEALTH SYSTEM, INC. Knoxville Healthcare, Pharmaceuticals and Biotech Hospitals
Corrections Corporation of America Nashville Business Services Security Services
AutoZone, Inc. Memphis Retail Automobile Parts Stores
Mueller Industries, Inc. Memphis Manufacturing Metals Manufacturing
UNUM Group Chattanooga Financial Services Insurance and Risk Management
Fred's, Inc. Memphis Retail Grocery and Specialty Food Stores
International Paper Company Memphis Manufacturing Paper and Paper Products
Regal Entertainment Group Knoxville Media and Entertainment Motion Picture and Recording Producers
Genesco Inc. Nashville Wholesale and Distribution Apparel Wholesalers
Cracker Barrel Old Country Store, Inc. Lebanon Retail Restaurants and Bars
Lifepoint Hospitals Inc. Brentwood Healthcare, Pharmaceuticals and Biotech Hospitals
FedEx Corporation Memphis Transportation and Storage Postal, Express Delivery, and Couriers
Community Health Systems Franklin Healthcare, Pharmaceuticals and Biotech Hospitals
HCA Holdings, Inc. Nashville Healthcare, Pharmaceuticals and Biotech Hospitals
HealthSpring Inc. Franklin Healthcare, Pharmaceuticals and Biotech Healthcare, Pharmaceuticals, and Biotech Other

training details locations, tags and why hsg

A successful career as a software developer or other IT professional requires a solid understanding of software development processes, design patterns, enterprise application architectures, web services, security, networking and much more. The progression from novice to expert can be a daunting endeavor; this is especially true when traversing the learning curve without expert guidance. A common experience is that too much time and money is wasted on a career plan or application due to misinformation.

The Hartmann Software Group understands these issues and addresses them and others during any training engagement. Although no IT educational institution can guarantee career or application development success, HSG can get you closer to your goals at a far faster rate than self paced learning and, arguably, than the competition. Here are the reasons why we are so successful at teaching:

  • Learn from the experts.
    1. We have provided software development and other IT related training to many major corporations in Tennessee since 2002.
    2. Our educators have years of consulting and training experience; moreover, we require each trainer to have cross-discipline expertise i.e. be Java and .NET experts so that you get a broad understanding of how industry wide experts work and think.
  • Discover tips and tricks about Linux Unix programming
  • Get your questions answered by easy to follow, organized Linux Unix experts
  • Get up to speed with vital Linux Unix programming tools
  • Save on travel expenses by learning right from your desk or home office. Enroll in an online instructor led class. Nearly all of our classes are offered in this way.
  • Prepare to hit the ground running for a new job or a new position
  • See the big picture and have the instructor fill in the gaps
  • We teach with sophisticated learning tools and provide excellent supporting course material
  • Books and course material are provided in advance
  • Get a book of your choice from the HSG Store as a gift from us when you register for a class
  • Gain a lot of practical skills in a short amount of time
  • We teach what we know…software
  • We care…
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Interesting Reads Take a class with us and receive a book of your choosing for 50% off MSRP.