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Flatcar Container Linux vs Ubuntu Linux comparison

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Comparison Buyer's Guide
Executive Summary

We performed a comparison between Flatcar Container Linux and Ubuntu Linux based on real PeerSpot user reviews.

Find out in this report how the two Operating Systems (OS) for Business solutions compare in terms of features, pricing, service and support, easy of deployment, and ROI.

To learn more, read our detailed Flatcar Container Linux vs. Ubuntu Linux report (Updated: September 2022).
635,513 professionals have used our research since 2012.
Featured Review
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Quotes From Members
We asked business professionals to review the solutions they use.
Here are some excerpts of what they said:
"The integrated solution approach reduces our TCO tremendously because we are able to focus on innovation instead of operations.""The most valuable features are the specification and technical guides, they are most important the security.""The most valuable thing about Red Hat is its stability, uptime, and support for various hardware vendors. Linux servers, in general, are relatively secure and they are more secure than Windows and other products.""I like the fact that most of the system configuration is Namespace so it's easy to get to and easy to configure, and most of it still uses text documents. Not all of it's a menu-driven-type entry. I also like the fact that it's a very standard file system layout so it's easy to navigate.""The feature that I like the most is that we can integrate it easily with our existing infrastructure. We found that it is much easier to deploy RHEL in our environment compared to a competing distribution like Ubuntu.""RHEL is stable, mature, and relatively easy to handle. I'm pretty confident in it. We haven't had to raise a serious support ticket for any server in I don't know how many years.""The security features are better than many other solutions offer.""It is a well-established operating system. We have tried to implement almost every feature of a version in our environment, and it has been very reliable. We are not facing many production issues on a day-to-day basis. They have well-documented articles on their documentation site and a knowledge base on their website. When we need to implement anything, we are able to find information about the best practices and the solution."

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"Flatcar's support is good. The version I am using is stable and allows us to make needed changes."

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"There are several manuals online that are free and available to help you.""It is stable and modern.""The auto upgrade operating system feature.""Ubuntu is free and stable.""Ubuntu Linux is very easy to learn, manage, and keep updated.""Ubuntu is great because you get most of the packages or software you need. You get the latest updates and stuff fairly fast.""What makes Ubuntu easy to use is the large set of applications and the interface. The graphical interface is user friendly.""This open source operating system promotes very secure environments with less possibility of being attacked. Support for this system is great because of its quick SLA."

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"It is a bit on the pricier side. However, due to the stability and support that they provide to my management and me, we really don't see a reason to choose another way to go. It is hard to get good support.""The Authselect tool needs improvement. This tool is used to connect your system to an identity provider or directory service, e.g., openLDAP. There is documentation and descriptions. While there are a few use cases and examples described, it is sometimes hard to use these tools to set up the configuration that we need for our specific environment. I would like it if there was more general information about the tool, not just describing a use case. For example, here is how to do it and how to connect to some kind of openLDAP service as well as more information about when you need to configure certificate services and mutual authentication.""Security could be increased.""I would like to see improvements made to the subscriptions and management of them.""Large application vendors may not have certified RHEL, or they have certified an older version. Most of the large application vendors are unfamiliar with the versioning that RHEL introduced, which I strongly support. They will support a given sub-version up to a point, not realizing that the sub-versions are essentially additive.""Their pricing and documentation can be improved.""An area for improvement in RHEL has to do with security policies. I know they are doing something about this in RHEL 9, but I haven't worked with that version yet. When it comes to security policies in RHEL 8, it is a bit behind. It would be better if we could just enforce a certain security policy such as CIS Level 1. That was not available, out-of-the-box, in RHEL 8.""It is mostly better than other solutions. However, it is sometimes difficult for disaster recovery, so we have to plan accordingly."

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"The development teams could sharpen their skills. They should offer applications on the net."

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"It would be nice to see more compatibility with certain Microsoft solutions, such as OneDrive.""The solution could improve by being more user-friendly.""More security features are needed to protect the current file system to prevent attacks.""In general, Windows is easier to use and friendlier to deal with than Ubuntu.""It could be better for working with software at a high resolution.""The solution could improve by having better integration.""When installing software, an online interface has to be used and commands written to run the installation. The solution could be improved if it was possible to click twice in an icon for the installation process to begin.""I think Ubuntu's performance is fine and so is its user interface. However, the latter is not as fancy as Microsoft Windows. It could be a bit fancier and easier to use."

More Ubuntu Linux Cons →

Pricing and Cost Advice
  • "Red Hat Linux is inexpensive. Linux solutions are generally inexpensive."
  • "RHEL is expensive."
  • "Because it is a subscription, you can go elastic. This means you can buy a year, then you can skip a year. It is not like when you buy something. You don't buy it. You are paying for the support on something, and if you don't pay for the support on something, there is no shame because there are no upfront costs. It changes the equation. However, we have such growth right now on the Linux platform that we are reusing and scavenging these licenses. From a business standpoint, not having to buy, but just having to pay for maintenance, changes a lot of the calculations."
  • "We have a site license on a yearly basis. Generally, we're okay with its price, but everything could be cheaper."
  • "The licensing with Red Hat is on par with other organizations like Microsoft. We have a site license, which gives us a certain number of servers, perhaps 25,000, for the type of license that we have. That works really well for us."
  • "We are an educational institution and as such, what we pay is less than the average company."
  • "It is more expensive than other vendors in terms of pricing and licensing, but because of its stability, I have to go with it."
  • "If you don't buy the Red Hat subscription, you don't get technical support, and you don't have all the updates. To have everything working like a charm, the cost that you pay for it is worth it. In Bolivia, we don't have the best internet connection. Therefore, we have a local service with all the packages, repositories, etc. We manage them locally, and because we have a subscription, we can update them. So, we have local repositories with all the packages and other things to make it easy for us to update all the servers. Without the Red Hat subscription, we cannot update anything."
  • More Red Hat Enterprise Linux (RHEL) Pricing and Cost Advice →

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  • "Ubuntu pricing is reasonable."
  • "It is open source, so it is free. There is no licensing fee."
  • "It is a free product."
  • "Ubuntu is an open-source Linux operating system that can be used free of charge."
  • "Ubuntu Linux is open-source and available to use free of charge."
  • "It is also manageable and financially affordable."
  • "I don't need to pay for the license."
  • "It comes as free software, where there is an option for you to buy support licenses."
  • More Ubuntu Linux Pricing and Cost Advice →

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    635,513 professionals have used our research since 2012.
    Questions from the Community
    Top Answer:Red Hat Enterprise Linux is fantastic. It is an inexpensive solution that has excellent security, performance, and… more »
    Top Answer:The integrated solution approach reduces our TCO tremendously because we are able to focus on innovation instead of… more »
    Top Answer:RHEL is a great place to go. They have a great thing that is not very well-known, which is called the Learning… more »
    Top Answer:Flatcar's support is good. The version I am using is stable and allows us to make needed changes.
    Top Answer:The development teams could sharpen their skills. They should offer applications on the net.
    Top Answer:I would rate the solution an eight out of ten.
    Top Answer:Ubunto Linux is a complete Linux operating system that is freely available with both community and professional support… more »
    Top Answer:The tools we are using for this project are compatible with this solution.
    Top Answer:There is not a license needed for the solution. You only have to pay for technical support.
    Also Known As
    Red Hat Enterprise Linux, RHEL
    Learn More
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    To put your enterprise in a position to win, you have to break down the barriers that hold you back. With Red Hat Enterprise Linux, a platform with unparalleled stability and flexibility, you can reallocate your resources toward meeting the next challenges instead of just maintaining the status quo.

    For SAP workloads, Red Hat Enterprise Linux for SAP Solutions combines the reliability, scalability, and performance of Linux with technologies that meet the specific requirements of SAP workloads. It’s certified for integration with SAP S/4HANA and built on the same foundation as the world’s leading enterprise Linux platform, Red Hat Enterprise Linux.  For more information on Red Hat's portfolio of solutions for SAP workloads visit

    Flatcar Container Linux
    Commercially supported Linux distribution designed for container workloads; a drop-in replacement for CoreOS Container Linux

    Super-fast, easy to use and free, the Ubuntu operating system powers millions of desktops, netbooks and servers around the world.
    Learn more about Red Hat Enterprise Linux (RHEL)
    Learn more about Flatcar Container Linux
    Learn more about Ubuntu Linux
    Sample Customers
    Travel Channel, Mohawk Industries, Hilti, Molecular Health, Exolgan, Hotelplan Group, Emory University, BlueCross BlueShield of North Carolina, HCA Healthcare, Paychex, UPS, Intermountain Healthcare, Brinker International, TransUnion, Union Bank, CA Technologies
    CISCO, mettle, Microsoft, Upguard, GMX
    Samsung, eBay, AT&T, Walmart, Cisco, Time Warner Cable, Bloomberg, Best Buy, Dell, Intel, Microsoft, Ericsson, Orange, Wells Fargo
    Top Industries
    Financial Services Firm19%
    Comms Service Provider14%
    Computer Software Company10%
    Comms Service Provider16%
    Computer Software Company16%
    Financial Services Firm8%
    Comms Service Provider28%
    Computer Software Company17%
    Manufacturing Company9%
    Comms Service Provider20%
    Computer Software Company18%
    Financial Services Firm8%
    Educational Organization6%
    Comms Service Provider27%
    Computer Software Company14%
    Educational Organization8%
    Company Size
    Small Business38%
    Midsize Enterprise13%
    Large Enterprise50%
    Small Business18%
    Midsize Enterprise15%
    Large Enterprise67%
    Small Business13%
    Midsize Enterprise19%
    Large Enterprise68%
    Small Business47%
    Midsize Enterprise16%
    Large Enterprise37%
    Small Business20%
    Midsize Enterprise20%
    Large Enterprise60%
    Buyer's Guide
    Operating Systems (OS) for Business
    September 2022
    Find out what your peers are saying about Red Hat, Canonical, Microsoft and others in Operating Systems (OS) for Business. Updated: September 2022.
    635,513 professionals have used our research since 2012.

    Flatcar Container Linux is ranked 11th in Operating Systems (OS) for Business with 1 review while Ubuntu Linux is ranked 2nd in Operating Systems (OS) for Business with 84 reviews. Flatcar Container Linux is rated 8.0, while Ubuntu Linux is rated 8.6. The top reviewer of Flatcar Container Linux writes "The solution is stable and allows us to make needed changes". On the other hand, the top reviewer of Ubuntu Linux writes "Low-cost open source operating system with better security and quick support". Flatcar Container Linux is most compared with CentOS, Amazon FreeRTOS and SUSE Linux Enterprise, whereas Ubuntu Linux is most compared with Oracle Linux, SUSE Linux Enterprise, Windows Server, CentOS and SUSE OpenStack Cloud.

    See our list of best Operating Systems (OS) for Business vendors.

    We monitor all Operating Systems (OS) for Business reviews to prevent fraudulent reviews and keep review quality high. We do not post reviews by company employees or direct competitors. We validate each review for authenticity via cross-reference with LinkedIn, and personal follow-up with the reviewer when necessary.