Advanced Nagios Interview Questions And Answers

Top 30 Nagios Interview Questions And Answers For Experienced 2018. If you are searching for interview questions on Nagios, then your search ends here. In this blog post coding compiler presenting a list of 30 Nagios Devops interview questions. We hope that these Nagios questions will help you to crack your next DevOps job interview. All the best for your future and happy learning.

Nagios Interview Questions

  1. What is Nagios?
  2. What is Nagios monitoring tool in Linux?
  3. What is an icinga?
  4. What is active and passive checks in Nagios?
  5. What is OID Nagios?
  6. What does Nagios use to monitor?
  7. What does Check_mk do?
  8. What is icinga2?
  9. What is a plugin in Nagios?
  10. Can Nagios monitor Windows machine?
  11. What is Nrpe in Nagios?
  12. What is Nagios XI?
  13. What are the benefits of using Nagios?
  14. What is Active Check?
  15. What is Nagios Log Server?
  16. What is Nagios Network Analyzer?
  17. Explain the process of website Monitoring With Nagios?
  18. What are the benefits of website monitoring with Nagios?
  19. What are the benefits of HTTP monitoring with Nagios?
  20. What are the benefits of SSL Certificate Monitoring With Nagios?
  21. What are the benefits of Database Monitoring with Nagios?
  22. Which databases supports Nagios?
  23. Nagios supports which protocol monitoring?
  24. What are the benefits of Operating System (OS) Monitoring with Nagios?
  25. Nagios supports which OS Monitoring?
  26. What are the benefits of Cloud Computing And Cloud Monitoring With Nagios?
  27. Explain Virtualization With Nagios?
  28. Explain Application Server Monitoring With Nagios?
  29. Explain Storage Monitoring With Nagios?
  30. Explain Log Monitoring and Management with Nagios?

Nagios Interview Questions And Answers

Nagios Interview Questions # 1) What is Nagios?

A) Nagios is a open source powerful monitoring system that enables organizations to identify and resolve IT infrastructure problems before they affect critical business processes.

 

Nagios Interview Questions # 2) What is Nagios monitoring tool in Linux?

A) Nagios provides complete monitoring of Linux operating systems and distributions – including operating system metrics, service state, process state, file system usage, and more. When you use Nagios to monitor your Linux environment, you’re using one of the most powerful Linux monitoring tools on the planet.

 

Nagios Interview Questions # 3) What is an icinga?

A) Icinga is an open source computer system and network monitoring application. It was originally created as a fork of the Nagios system monitoring application in 2009. The name Icinga is a Zulu word meaning “it looks for”, “it browses” or “it examines” and is pronounced with a click consonant.

 

Nagios Interview Questions # 4) What is active and passive checks in Nagios?

A) Active checks can be used to “poll” a device or service for status information every so often. Nagios also supports a way to monitor hosts and services passively instead of actively. The key features of passive checks are as follows: Passive checks are initiated and performed by external applications/processes.

 

Nagios Interview Questions # 5) What is OID Nagios?

A) SNMP (Simple Network Management Protocol) is a network protocol designed for monitoring network-attached devices. It uses OIDs (Object IDentifiers) for defining the information, known as MIBs (Management Information Base), that can be monitored.

Nagios Basic Interview Questions

Nagios Interview Questions # 6) What does Nagios use to monitor?

A) Nagios is now known as Nagios Core, is a free and open source computer-software application that monitors systems, networks and infrastructure. Nagios offers monitoring and alerting services for servers, switches, applications and services.

 

Nagios Interview Questions # 7) What does Check_mk do?

A) Check_MK is an extension to the Nagios monitoring system that allows creating rule-based configuration using Python and offloading work from the Nagios core to make it scale better, allowing more systems to be monitored from a single Nagios server.

 

Nagios Interview Questions # 8) What is icinga2?

A) Icinga 2 is an open source monitoring system which checks the availability of your network resources, notifies users of outages, and generates performance data for reporting. Scalable and extensible, Icinga 2 can monitor large, complex environments across multiple locations.

 

Nagios Interview Questions # 9) What is a plugin in Nagios?

A) Plugins are compiled executables or scripts (Perl scripts, shell scripts, etc.) that can be run from a command line to check the status or a host or service. Nagios uses the results from plugins to determine the current status of hosts and services on your network.

 

Nagios Interview Questions # 10) Can Nagios monitor Windows machine?

A) To monitor Windows Machines you will need to follow several steps and they are: Install NSClient++ addon on the Windows Machine. Configure Nagios Server for monitoring Windows Machine. Add new host and service definitions for Windows machine monitoring.

Nagios XI Interview Questions

Nagios Interview Questions # 11) What is Nrpe in Nagios?

A) NRPE allows you to remotely execute Nagios plugins on other Linux/Unix machines. This allows you to monitor remote machine metrics (disk usage, CPU load, etc.). NRPE can also communicate with some of the Windows agent addons, so you can execute scripts and check metrics on remote Windows machines as well.

 

Nagios Interview Questions # 12) What is Nagios XI?

A) Nagios XI provides monitoring of all mission-critical infrastructure components including applications, services, operating systems, network protocols, systems metrics, and network infrastructure. Hundreds of third-party addons provide for monitoring of virtually all in-house and external applications, services, and systems.

Nagios Interview Questions # 13) What are the benefits of using Nagios?

A) There are many benefits of using Nagios:

  • Plan for infrastructure upgrades before outdated systems cause failures
  • Respond to issues at the first sign of a problem
  • Automatically fix problems when they are detected
  • Coordinate technical team responses
  • Ensure your organization’s SLAs are being met
  • Ensure IT infrastructure outages have a minimal effect on your organization’s bottom line
  • Monitor your entire infrastructure and business processes

 

Nagios Interview Questions # 14) What is Active Check?

A) A check that is initiated and performed by Nagios Core or Nagios XI – usually on a pre-determined schedule. Plugins are used to perform active checks.

Nagios Server Interview Questions

Nagios Interview Questions # 15) What is Nagios Log Server?

A) Nagios Log Server greatly simplifies the process of searching your log data. Set up alerts to notify you when potential threats arise, or simply query your log data to quickly audit any system. With Nagios Log Server, you get all of your log data in one location, with high availability and fail-over built right in.

 

Nagios Interview Questions # 16) What is Nagios Network Analyzer?

A) Nagios Network Analyzer provides an in-depth look at all network traffic sources and potential security threats allowing system admins to quickly gather high-level information regarding the health of the network as well as highly granular data for complete and thorough network analysis using netflow, sflow, jflow, etc.

 

Nagios Interview Questions # 17) Explain the process of website Monitoring With Nagios?

A) Nagios provides complete monitoring of websites, web applications, web transactions, and web services – including availability, URL monitoring, HTTP status, content monitoring, hijack detection, and more.

 

Nagios Interview Questions # 18) What are the benefits of website monitoring with Nagios?

A) Implementing effective website monitoring with Nagios offers the following benefits:

  • Increased website and web application availability
  • Increased website performance
  • Fast detection of outages, website defacement, and website hijacking
  • Capacity planning information for future web server and application upgrades

Nagios Interview Questions # 19) What are the benefits of HTTP monitoring with Nagios?

A) Nagios provides complete monitoring of HTTP and HTTPS servers and protocols.

Benefits – Implementing effective HTTP monitoring with Nagios offers the following benefits:

  • Increased server, services, and application availability
  • Fast detection of network outages and protocol failures
  • User experience monitoring
  • Web server performance monitoring
  • Web transaction monitoring
  • URL monitoring

Nagios Server Interview Questions

Nagios Interview Questions # 20) What are the benefits of SSL Certificate Monitoring With Nagios?

A) Nagios provides SSL Certificate monitoring to ensure that expired certificates don’t negatively impact your organization’s websites, applications, and security.

Benefits – Implementing effective SSL Certificate monitoring with Nagios offers the following benefits:

  • Increased website and application availability
  • Increased security

 

Nagios Interview Questions # 21) What are the benefits of Database Monitoring with Nagios?

A) Nagios provides complete monitoring of database servers and databases – including availability, database and table sizes, cache ratios, and other key metrics.

Benefits – Implementing effective database monitoring with Nagios offers the following benefits:

  • Increased application availability
  • Increased database performance
  • Fast detection of database outages, failures, and table corruption
  • Predictive analysis of storage requirements and index performance

 

Nagios Interview Questions # 22) Which databases supports Nagios?

A) Nagios supports following databases for monitoring.

  1. MySQL
  2. Postgres
  3. Oracle
  4. DB2 Monitoring
  5. Microsoft SQL Server

 

Nagios Interview Questions # 23) Nagios supports which protocol monitoring?

A) Nagios supports following Protocol Monitoring:

  • HTTP Monitoring
  • DNS Monitoring
  • FTP Monitoring
  • SNMP Monitoring
  • SMTP Monitoring
  • SSH Monitoring
  • LDAP Monitoring
  • IMAP Monitoring
  • POP Monitoring
  • ICMP Monitoring
  • DHCP Monitoring
  • IPMI Monitoring

 

Nagios Interview Questions # 24) What are the benefits of Operating System (OS) Monitoring with Nagios?

A) Nagios provides complete monitoring of desktop and server operating systems – including system metrics, service states, process states, performance counters, event logs, applications (IIS, Exchange, Apache, MySQL, etc), and services (Active Directory, DHCP, Sendmail, etc).

Benefits: Implementing effective operating system monitoring with Nagios offers the following benefits:

  • Increased server, services, and application availability
  • Fast detection of network outages and protocol failures
  • Fast detection of failed services, processes and batch jobs

 

Nagios Interview Questions # 25) Nagios supports which OS Monitoring?

A) Nagios supports following operating system monitoring:

  • Windows Monitoring
  • Linux Monitoring
  • UNIX Monitoring
  • Solaris Monitoring
  • AIX Monitoring
  • HP-UX Monitoring
  • RHEL Monitoring
  • Ubuntu Monitoring
  • Debian Monitoring
  • CentOS Monitoring
  • Fedora Monitoring
  • SuSE Monitoring

 

Nagios Interview Questions # 26) What are the benefits of Cloud Computing And Cloud Monitoring With Nagios?

A) Nagios provides complete monitoring of cloud computing, web, and storage services. Nagios is capable of monitoring a variety of servers and operating systems – both physical and virtual.

Benefits – Implementing effective cloud monitoring with Nagios offers the following benefits:

  • Increased server, services, and application availability
  • Fast detection of network outages
  • Fast detection of cloud computing environment problems

 

Nagios Interview Questions # 27) Explain Virtualization With Nagios?

A) Nagios provides the capabilities to monitor an assortment of metrics on many different virtualization platforms. In addition, Nagios can be run from several different virtualization platforms such as VMware, Microsoft Virtual PC, Xen, Amazon EC2, etc. Nagios had pre-built VM’s for both Nagios Core and Nagios XI created for VMware, as well as Virtual PC and OFV Template for Nagios XI.

Benefits: Implementing effective virtualization monitoring with Nagios offers the following benefits:

  • Increased server, services, and application availability
  • Fast detection of server and operating system failures
  • Fast detection of service and application failures
  • Reduced deployment time
  • Reduced administrative overhead
  • Centralized configuration
  • Ability to monitor the following Metrics

CPU Usage, Memory, Networking, Input / Output, Datastore usage, VM Status, Services, More…

 

Nagios Interview Questions # 28) Explain Application Server Monitoring With Nagios?

A) Nagios provides complete monitoring of application servers – including JBOSS, Websphere, Weblogic, ActiveMQ, and Tomcat.

Benefits: Implementing effective application server monitoring with Nagios offers the following benefits:

  • Increased server, services, and application availability
  • Fast detection of network outages and protocol failures
  • Fast detection of failed process, services and batch jobs

 

Nagios Interview Questions # 29) Explain Storage Monitoring With Nagios?

A) Nagios provides complete monitoring of storage systems – including directory size, disk usage, file count, file presence, file size, S.M.A.R.T. status, RAID array status, and more.

Benefits: Implementing effective storage monitoring with Nagios offers the following benefits:

  • Detection of failed batch jobs
  • Advanced planning for system upgrades
  • Fast detection of storage subsystem problems
  • Early detection of potential future failures
  • Reduced risk of unexpected downtime

 

Nagios Interview Questions # 30) Explain Log Monitoring and Management with Nagios?

A) Nagios provides complete monitoring and log management of application logs, log files, event logs, service logs, and system logs on Windows servers, Linux servers, and Unix servers. Nagios is capable of monitoring system logs, application logs, log files, and syslog data, and alerting you when a log pattern is detected.

Benefits: Implementing effective log monitoring with Nagios offers the following benefits:

  • Increased security
  • Increased awareness of network infrastructure problems
  • Increased server, services, and application availability
  • Fast detection of network outages and protocol failures
  • Fast detection of failed processes, services, cron jobs, and batch jobs
  • Audit compliance and regulatory compliance

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