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Nagios Core on CentOS vs Rocky Linux comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Feb 15, 2026

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

ROI

Sentiment score
4.0
Nagios Core on CentOS enhances efficiency, reducing downtime by up to 40% and saving up to $50,000 annually.
Sentiment score
4.6
Rocky Linux reduces costs, maintenance time, and boosts community support, leading to significant savings and resource onboarding opportunities.
We definitely see a positive ROI using Nagios Core on CentOS, as while it does not have licensing costs, the real return came from reducing downtime, faster issue resolution, and improved operational efficiency.
Senior HPC Engineer at a energy/utilities company with 10,001+ employees
Nagios Core on CentOS lets me know about these issues, and I can recover the system or stop the disaster, saving both money and time.
System Software Support Engineer at a tech vendor with 11-50 employees
With proactive alerts, unplanned downtime dropped by around thirty to forty percent.
Team Lead, Service DevOps at a computer software company with 51-200 employees
When it comes to return on investment, a lot of money is saved since we moved from a purchased license to the open source provided by Rocky Linux.
System engineer at a retailer with 10,001+ employees
ROI has been good as we have significant open source community involvement.
Technical Manager at a tech vendor with 10,001+ employees
I have seen a return on investment since there was definitely money saved at the time due to the lack of need for licensing since Rocky is available openly.
System Administrator at a computer software company with 5,001-10,000 employees
 

Customer Service

Sentiment score
5.0
Nagios Core on CentOS offers community-driven support with forums, while enterprise subscribers get additional technical help.
Sentiment score
4.7
Rocky Linux support is reliable with active community help, excellent customer support, and a preference for in-house assistance.
Because of the documentation regarding installation, configuration, and troubleshooting, it helped a lot and avoids confusion.
Infrastructure Analyst at a tech vendor with 10,001+ employees
Enterprise support provides assistance for installation, upgrade guidance, and troubleshooting configuration help.
Infrastructure Specialist at IBM
For Nagios Core on CentOS, customer support is community-driven rather than vendor-driven.
Senior HPC Engineer at a energy/utilities company with 10,001+ employees
The support level is extraordinary, providing on-time assistance.
Senior System Engineer at Al Jazeera Media Network
We have not yet needed to contact a vendor regarding Rocky Linux.
Senior Network Engineer at KLC bvba
Even if we raise a support ticket, we receive a resolution or a reply from the team within two business days.
System engineer at a retailer with 10,001+ employees
 

Scalability Issues

Sentiment score
4.8
Nagios Core on CentOS is stable and scalable for small to medium enterprises, with options for larger deployments.
Sentiment score
5.9
Rocky Linux is highly scalable, easily automated, Red Hat compatible, and suitable for diverse environments from small to large clusters.
Scaling to large environments requires additional architecture and planning.
Senior HPC Engineer at a energy/utilities company with 10,001+ employees
Scalability is easy, making it simple to scale up as my organization grows and needs to monitor more servers or services.
Senior IT Engineer at a tech vendor with 10,001+ employees
Its scalability is overall good for medium and large enterprise environments, though it requires tuning at a very large scale.
Infrastructure Specialist at IBM
Even if the server is not responding and we want to attach the volume on another instance or a temporary instance, it is very easy and straightforward with no hiccups.
CloudOps Engineer at a computer software company with 10,001+ employees
It has handled growth or changing needs well.
System Administrator at a computer software company with 5,001-10,000 employees
The scalability is quite good, though there are some issues with Rocky Linux.
System Engineer at clusterkit
 

Stability Issues

Sentiment score
7.6
Nagios Core on CentOS is stable and reliable, but users desire improved UI and consider alternatives like Grafana.
Sentiment score
7.3
Rocky Linux is praised for stability, reliability, ease of use, scalability, and performance on low-resource systems without complexity.
Nagios Core on CentOS is stable and reliable, especially for long-running monitoring environments.
Senior HPC Engineer at a energy/utilities company with 10,001+ employees
In my experience, Nagios Core on CentOS is very stable and continues to function well.
Team Lead, Service DevOps at a computer software company with 51-200 employees
Nagios Core on CentOS is improving its reliability and accuracy to get nice precision to the different services and correct monitoring.
Chief Information Officer at Cordero y Asociados S.L. - Cordero Informáticos
Rocky Linux is stable, scalable, and it is very much easier to use.
System engineer at a retailer with 10,001+ employees
Rocky Linux is stable.
Software Engineer at a comms service provider with 10,001+ employees
 

Room For Improvement

Nagios Core on CentOS needs UI updates, better documentation, scalability enhancements, and improved integration for enterprise environments.
Rocky Linux users seek better Kubernetes integration, faster updates, improved Windows support, and enhanced documentation for better overall experience.
For large environments, scaling Nagios Core on CentOS requires additional architectural planning, and tuning alerts is critical; otherwise, teams start ignoring notifications.
Senior HPC Engineer at a energy/utilities company with 10,001+ employees
The learning curve for new users adopting Nagios Core on CentOS is challenging, primarily due to the limited documentation available on the internet regarding how to install and maintain it.
System Software Support Engineer at a tech vendor with 11-50 employees
Plugins for monitoring services of an F5 load balancer or different other hardware devices such as Imperva WAF would be very useful.
Cloud Dev Ops Engineer at a marketing services firm with 10,001+ employees
It is based on customer requirements, as they might want to use Rocky Linux or Ubuntu, depending on their needs.
System Engineer at clusterkit
Rocky Linux could be improved by having more integration with Kubernetes.
Linux architect at European Commission
Currently, it takes more than one month to release a new package or kernel, so speeding that up would help reduce reported vulnerability remediations.
System engineer at a retailer with 10,001+ employees
 

Setup Cost

CentOS Nagios Core users value its open-source cost-effectiveness, ease of setup, and minimal managed indirect costs for monitoring.
Rocky Linux is valued for its cost-effectiveness and stability, offering enterprise-level features without licensing fees.
The main factors that influenced my decision to choose Nagios Core on CentOS over other monitoring solutions are mainly its free of cost, open source nature, which saves a lot of money, and it being easy to install, so even junior staff can set it up straight away to start monitoring.
Infrastructure Analyst at a tech vendor with 10,001+ employees
Regarding pricing, setup cost, and licensing, I used the open-source version, so the setup cost is zero and no license is required.
Team Lead, Service DevOps at a computer software company with 51-200 employees
My experience with pricing, setup cost, and licensing is that it is good, with very cheap costs.
Senior Business Analyst at Netcore Cloud
We switched to Rocky Linux because of the license price, and in our business, we don't need to have a higher cost as that is not a good idea.
Network Infrastructure Manager at SAGEMCOM
There is no extra cost for a license if we are purchasing Rocky Linux from the AWS Marketplace.
CloudOps Engineer at a computer software company with 10,001+ employees
Rocky Linux is free, and I can download it and deploy it in whatever environment I have, whether it be H3C, VMware, or Hyper-V.
Server & Cloud Engineer at a tech services company with 1-10 employees
 

Valuable Features

Nagios Core on CentOS provides flexible, cost-effective monitoring through plugins, offering proactive issue detection and centralized visibility.
Rocky Linux offers stability, RHEL compatibility, seamless CentOS migration, enterprise support, cost savings, and strong security for efficient workflows.
The best features Nagios Core on CentOS offers are the capabilities to monitor both Windows and Linux services, as well as the ability to write custom plugins to monitor different services if the needed plugins are not provided by default.
Cloud Dev Ops Engineer at a marketing services firm with 10,001+ employees
The biggest strength of Nagios Core on CentOS is its plugin architecture, which is extremely flexible because plugins are scripts or binaries that return a standard output and exit code.
Senior HPC Engineer at a energy/utilities company with 10,001+ employees
Nagios Core on CentOS has positively impacted my organization by significantly reducing downtime through timely alerts configured according to my specifications.
Team Lead, Service DevOps at a computer software company with 51-200 employees
Rocky Linux has positively impacted my organization, specifically through cost savings, because we did not have to buy any licenses or extra licenses of other distros, such as Oracle or Red Hat.
IT / IAM Senior Specialist at a tech vendor with 10,001+ employees
For production deployment, Rocky Linux is a great choice because it offers full RHEL compatibility without licensing costs, along with strong community support.
CloudOps Engineer at a computer software company with 10,001+ employees
Since migrating to Rocky Linux, I've seen specific outcomes such as improved security because CentOS stopped the project, and security patches aren't being released.
Linux architect at European Commission
 

Categories and Ranking

Nagios Core on CentOS
Ranking in Operating Systems (OS) for Business
22nd
Average Rating
8.4
Reviews Sentiment
5.0
Number of Reviews
13
Ranking in other categories
No ranking in other categories
Rocky Linux
Ranking in Operating Systems (OS) for Business
3rd
Average Rating
8.6
Reviews Sentiment
5.7
Number of Reviews
18
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of July 2026, in the Operating Systems (OS) for Business category, the mindshare of Nagios Core on CentOS is 0.2%, up from 0.0% compared to the previous year. The mindshare of Rocky Linux is 7.0%, down from 15.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Operating Systems (OS) for Business Mindshare Distribution
ProductMindshare (%)
Rocky Linux7.0%
Nagios Core on CentOS0.2%
Other92.8%
Operating Systems (OS) for Business
 

Featured Reviews

reviewer2836233 - PeerSpot reviewer
Infrastructure Analyst at a tech vendor with 10,001+ employees
Monitoring has reduced outages and improves proactive issue resolution across our infrastructure
Regarding complexity, I think there is no feature like InfluxDB AI, so it may require more expertise to configure. There are also some migration challenges in adopting the new dashboards, so it takes some time to train the staff, but it is not a big concern. I think it is better to add some advanced features. I do not think there are so many things that need to be improved in Nagios Core on CentOS. If it is better to customize the dashboard or if we can get something like a modern view, it will be helpful for the dashboard. I felt very happy with Nagios Core on CentOS. Why I took off one point is that I think it is better suited for a small or medium setup. If large enterprises can use Nagios Core on CentOS, it will be helpful. It also requires manual editing of the config file, so it is a little bit time-consuming. The web interface is functional, but compared to some other latest AI monitoring platforms, it is a little bit lacking. I think the AI platform would score higher, but it is good. The reporting is just basic, so if we compare it with Grafana, it needs richer insights.
Massimiliano Adamo - PeerSpot reviewer
Linux architect at European Commission
Has supported seamless migrations and enabled running complex data workloads securely
The best features Rocky Linux offers include clustering and all the packages from Red Hat.Rocky Linux has impacted my organization very positively because we migrated everything from CentOS and Windows servers to Rocky Linux. Everything is clear, with good packaging, and now it's version 9.6, which is very important for us due to security problems since we are in Europe. Rocky Linux is very good for security and other aspects. Since migrating to Rocky Linux, I've seen specific outcomes such as improved security because CentOS stopped the project, and security patches aren't being released. We need to maintain a system similar to Red Hat, which is very stable and has many features such as file system, topology, and containers.
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Top Industries

By visitors reading reviews
Construction Company
38%
Comms Service Provider
9%
Financial Services Firm
9%
Computer Software Company
6%
Comms Service Provider
15%
University
12%
Computer Software Company
10%
Manufacturing Company
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business5
Midsize Enterprise4
Large Enterprise9
By reviewers
Company SizeCount
Small Business5
Large Enterprise16
 

Questions from the Community

What is your experience regarding pricing and costs for Nagios Core on CentOS?
My company is using the open-source version of Nagios Core on CentOS, so there were no pricing, installation, or licensing costs.
What needs improvement with Nagios Core on CentOS?
Nagios Core on CentOS needs to improve the templates to send messages to IT companies and also integrate with different systems or improve integrations with QNAP, Synology, Ubiquiti, and different ...
What is your primary use case for Nagios Core on CentOS?
My main use case for Nagios Core on CentOS is monitoring all the services of my customers, including CPU, RAM, different kinds of services, and certificates. With the trigger feature, I try to opti...
What needs improvement with Rocky Linux?
I am not an expert on Rocky Linux, but I do not have anything to say regarding improvements; I think it is doing better. I chose a rating of eight out of ten because Rocky Linux must grow more; it ...
What is your primary use case for Rocky Linux?
My main use case for Rocky Linux is for the Nutanix environment, where we have a data center and everything is hosted there, including all the services and systems. Rocky Linux is the main OS of th...
What advice do you have for others considering Rocky Linux?
My advice to others looking into using Rocky Linux is to go ahead and use it. I give Rocky Linux a rating of eight out of ten.
 

Overview

Find out what your peers are saying about Nagios Core on CentOS vs. Rocky Linux and other solutions. Updated: June 2026.
902,988 professionals have used our research since 2012.