How To Install nagios on CentOS 8
nagios is Host/service/network monitoring program
Introduction
In this tutorial we learn how to install nagios on CentOS 8.
What is nagios
Nagios is a program that will monitor hosts and services on your network. It has the ability to send email or page alerts when a problem arises and when a problem is resolved. Nagios is written in C and is designed to run under Linux (and some other *NIX variants) as a background process, intermittently running checks on various services that you specify. The actual service checks are performed by separate “plugin” programs which return the status of the checks to Nagios. The plugins are available at https This package provides the core program, web interface, and documentation files for Nagios. Development files are built as a separate package.
We can use yum or dnf to install nagios on CentOS 8. In this tutorial we discuss both methods but you only need to choose one of method to install nagios.
Install nagios on CentOS 8 Using dnf
Update yum database with dnf using the following command.
sudo dnf makecache --refresh
The output should look something like this:
CentOS Linux 8 - AppStream 43 kB/s | 4.3 kB 00:00
CentOS Linux 8 - BaseOS 65 kB/s | 3.9 kB 00:00
CentOS Linux 8 - ContinuousRelease 43 kB/s | 3.0 kB 00:00
CentOS Linux 8 - Extras 23 kB/s | 1.5 kB 00:00
CentOS Linux 8 - FastTrack 40 kB/s | 3.0 kB 00:00
CentOS Linux 8 - HighAvailability 36 kB/s | 3.9 kB 00:00
CentOS Linux 8 - Plus 24 kB/s | 1.5 kB 00:00
CentOS Linux 8 - PowerTools 50 kB/s | 4.3 kB 00:00
Extra Packages for Enterprise Linux Modular 8 - x86_64 13 kB/s | 9.2 kB 00:00
Extra Packages for Enterprise Linux 8 - x86_64 24 kB/s | 8.5 kB 00:00
Metadata cache created.
After updating yum database, We can install nagios using dnf by running the following command:
sudo dnf -y install nagios
Install nagios on CentOS 8 Using yum
Update yum database with yum using the following command.
sudo yum makecache --refresh
The output should look something like this:
CentOS Linux 8 - AppStream 43 kB/s | 4.3 kB 00:00
CentOS Linux 8 - BaseOS 65 kB/s | 3.9 kB 00:00
CentOS Linux 8 - ContinuousRelease 43 kB/s | 3.0 kB 00:00
CentOS Linux 8 - Extras 23 kB/s | 1.5 kB 00:00
CentOS Linux 8 - FastTrack 40 kB/s | 3.0 kB 00:00
CentOS Linux 8 - HighAvailability 36 kB/s | 3.9 kB 00:00
CentOS Linux 8 - Plus 24 kB/s | 1.5 kB 00:00
CentOS Linux 8 - PowerTools 50 kB/s | 4.3 kB 00:00
Extra Packages for Enterprise Linux Modular 8 - x86_64 13 kB/s | 9.2 kB 00:00
Extra Packages for Enterprise Linux 8 - x86_64 24 kB/s | 8.5 kB 00:00
Metadata cache created.
After updating yum database, We can install nagios using yum by running the following command:
sudo yum -y install nagios
How To Uninstall nagios on CentOS 8
To uninstall only the nagios package we can use the following command:
sudo dnf remove nagios
nagios Package Contents on CentOS 8
/etc/httpd/conf.d/nagios.conf
/etc/logrotate.d/nagios
/etc/nagios/cgi.cfg
/etc/nagios/nagios.cfg
/etc/nagios/objects
/etc/nagios/objects/commands.cfg
/etc/nagios/objects/contacts.cfg
/etc/nagios/objects/localhost.cfg
/etc/nagios/objects/printer.cfg
/etc/nagios/objects/switch.cfg
/etc/nagios/objects/templates.cfg
/etc/nagios/objects/timeperiods.cfg
/etc/nagios/objects/windows.cfg
/etc/nagios/passwd
/etc/nagios/private
/etc/nagios/private/resource.cfg
/usr/bin/nagiostats
/usr/lib/.build-id
/usr/lib/.build-id/04
/usr/lib/.build-id/04/a08a2feb0ea6a90e6b6bd56a0b98c77847b727
/usr/lib/.build-id/06
/usr/lib/.build-id/06/a12ae3704be4f575a6264220285aa899a63061
/usr/lib/.build-id/0c
/usr/lib/.build-id/0c/5f6f0201218906b12f9b7c55d19d720fb66c41
/usr/lib/.build-id/1c
/usr/lib/.build-id/1c/e229688687fc96395c21e12248e0e42f30ba29
/usr/lib/.build-id/2e
/usr/lib/.build-id/2e/aa2fa23342496f3973cca016383be109f1aee7
/usr/lib/.build-id/35
/usr/lib/.build-id/35/14218c454c141f1f12481535dfec18bfca63cb
/usr/lib/.build-id/4e
/usr/lib/.build-id/4e/f91afcb3aaac04fdae04136f69a6de053538bb
/usr/lib/.build-id/6a
/usr/lib/.build-id/6a/e16020581c435a5681052f0e01ecdbab18dc97
/usr/lib/.build-id/71
/usr/lib/.build-id/71/5c60f540eb90a45f4fb15b2bd3df19d5d488f4
/usr/lib/.build-id/75
/usr/lib/.build-id/75/9a1335454b189a41c12d0b066e8ab4bc0a6ca9
/usr/lib/.build-id/99
/usr/lib/.build-id/99/a2dd0d778991409279799a4d0209b58aa83e90
/usr/lib/.build-id/a3
/usr/lib/.build-id/a3/a1e1d2ed78b4f6a1af557cf8915ae9b075adc7
/usr/lib/.build-id/b2
/usr/lib/.build-id/b2/8a7a62a25143623d268670f2ae37bef9c72d6c
/usr/lib/.build-id/ba
/usr/lib/.build-id/ba/8ef48892e563dbef976f6ae3d5b2a19dedf76b
/usr/lib/.build-id/be
/usr/lib/.build-id/be/bff315b2e0869307fa185d41d777af523e9222
/usr/lib/.build-id/c1
/usr/lib/.build-id/c1/6b24f452e47fedc5761d0870dad3ce8e9fcf8e
/usr/lib/.build-id/cb
/usr/lib/.build-id/cb/c03b74b998c7cda51a7ace338540a04ebee6e6
/usr/lib/.build-id/d7
/usr/lib/.build-id/d7/7b19d99f3e9cce021f2d9c2bbe29a975f7e8b6
/usr/lib/.build-id/e9
/usr/lib/.build-id/e9/b1e7c8ed22518e278b06add258b69860a1c4f6
/usr/lib/.build-id/eb
/usr/lib/.build-id/eb/1dc09798c0ce6950650b4784a2a65395083903
/usr/lib/.build-id/eb/b793420ab907e875770b881a45b47e52ad41eb
/usr/lib/.build-id/ee
/usr/lib/.build-id/ee/2a33e476fd5ceaa880f6d03355d9f5baa73e41
/usr/lib/systemd/system/nagios.service
/usr/lib/tmpfiles.d/nagios.conf
/usr/lib64/nagios/cgi-bin
/usr/lib64/nagios/cgi-bin/archivejson.cgi
/usr/lib64/nagios/cgi-bin/avail.cgi
/usr/lib64/nagios/cgi-bin/cmd.cgi
/usr/lib64/nagios/cgi-bin/config.cgi
/usr/lib64/nagios/cgi-bin/extinfo.cgi
/usr/lib64/nagios/cgi-bin/histogram.cgi
/usr/lib64/nagios/cgi-bin/history.cgi
/usr/lib64/nagios/cgi-bin/notifications.cgi
/usr/lib64/nagios/cgi-bin/objectjson.cgi
/usr/lib64/nagios/cgi-bin/outages.cgi
/usr/lib64/nagios/cgi-bin/showlog.cgi
/usr/lib64/nagios/cgi-bin/status.cgi
/usr/lib64/nagios/cgi-bin/statusjson.cgi
/usr/lib64/nagios/cgi-bin/statusmap.cgi
/usr/lib64/nagios/cgi-bin/statuswml.cgi
/usr/lib64/nagios/cgi-bin/statuswrl.cgi
/usr/lib64/nagios/cgi-bin/summary.cgi
/usr/lib64/nagios/cgi-bin/tac.cgi
/usr/lib64/nagios/cgi-bin/trends.cgi
/usr/sbin/convertcfg
/usr/sbin/nagios
/usr/share/doc/nagios
/usr/share/doc/nagios/Changelog
/usr/share/doc/nagios/INSTALLING
/usr/share/doc/nagios/README.md
/usr/share/doc/nagios/UPGRADING
/usr/share/doc/nagios/UpgradeToVersion4.ReadMe
/usr/share/doc/nagios/UpgradeToVersion4.sh
/usr/share/doc/nagios/internet.cfg
/usr/share/licenses/nagios
/usr/share/licenses/nagios/LICENSE
/usr/share/nagios
/usr/share/nagios/html
/usr/share/nagios/html/angularjs
/usr/share/nagios/html/angularjs/angular-1.3.9
/usr/share/nagios/html/angularjs/angular-1.3.9/angular.min.js
/usr/share/nagios/html/angularjs/angular-1.3.9/angular.min.js.map
/usr/share/nagios/html/angularjs/ui-bootstrap-tpls-0.14.3.min.js
/usr/share/nagios/html/angularjs/ui-utils-0.2.3
/usr/share/nagios/html/angularjs/ui-utils-0.2.3/ui-utils.js
/usr/share/nagios/html/bootstrap-3.3.7
/usr/share/nagios/html/bootstrap-3.3.7/css
/usr/share/nagios/html/bootstrap-3.3.7/css/bootstrap-theme.min.css
/usr/share/nagios/html/bootstrap-3.3.7/css/bootstrap.min.css
/usr/share/nagios/html/config.inc.php
/usr/share/nagios/html/contexthelp
/usr/share/nagios/html/contexthelp/A1.html
/usr/share/nagios/html/contexthelp/A2.html
/usr/share/nagios/html/contexthelp/A3.html
/usr/share/nagios/html/contexthelp/A4.html
/usr/share/nagios/html/contexthelp/A5.html
/usr/share/nagios/html/contexthelp/A6.html
/usr/share/nagios/html/contexthelp/A7.html
/usr/share/nagios/html/contexthelp/B1.html
/usr/share/nagios/html/contexthelp/C1.html
/usr/share/nagios/html/contexthelp/D1.html
/usr/share/nagios/html/contexthelp/E1.html
/usr/share/nagios/html/contexthelp/F1.html
/usr/share/nagios/html/contexthelp/G1.html
/usr/share/nagios/html/contexthelp/G2.html
/usr/share/nagios/html/contexthelp/G3.html
/usr/share/nagios/html/contexthelp/G4.html
/usr/share/nagios/html/contexthelp/G5.html
/usr/share/nagios/html/contexthelp/G6.html
/usr/share/nagios/html/contexthelp/H1.html
/usr/share/nagios/html/contexthelp/H2.html
/usr/share/nagios/html/contexthelp/H3.html
/usr/share/nagios/html/contexthelp/H4.html
/usr/share/nagios/html/contexthelp/H5.html
/usr/share/nagios/html/contexthelp/H6.html
/usr/share/nagios/html/contexthelp/H7.html
/usr/share/nagios/html/contexthelp/H8.html
/usr/share/nagios/html/contexthelp/I1.html
/usr/share/nagios/html/contexthelp/I2.html
/usr/share/nagios/html/contexthelp/I3.html
/usr/share/nagios/html/contexthelp/I4.html
/usr/share/nagios/html/contexthelp/I5.html
/usr/share/nagios/html/contexthelp/I6.html
/usr/share/nagios/html/contexthelp/I7.html
/usr/share/nagios/html/contexthelp/I8.html
/usr/share/nagios/html/contexthelp/I9.html
/usr/share/nagios/html/contexthelp/J1.html
/usr/share/nagios/html/contexthelp/K1.html
/usr/share/nagios/html/contexthelp/L1.html
/usr/share/nagios/html/contexthelp/L10.html
/usr/share/nagios/html/contexthelp/L11.html
/usr/share/nagios/html/contexthelp/L12.html
/usr/share/nagios/html/contexthelp/L13.html
/usr/share/nagios/html/contexthelp/L2.html
/usr/share/nagios/html/contexthelp/L3.html
/usr/share/nagios/html/contexthelp/L4.html
/usr/share/nagios/html/contexthelp/L5.html
/usr/share/nagios/html/contexthelp/L6.html
/usr/share/nagios/html/contexthelp/L7.html
/usr/share/nagios/html/contexthelp/L8.html
/usr/share/nagios/html/contexthelp/L9.html
/usr/share/nagios/html/contexthelp/M1.html
/usr/share/nagios/html/contexthelp/M2.html
/usr/share/nagios/html/contexthelp/M3.html
/usr/share/nagios/html/contexthelp/M4.html
/usr/share/nagios/html/contexthelp/M5.html
/usr/share/nagios/html/contexthelp/M6.html
/usr/share/nagios/html/contexthelp/N1.html
/usr/share/nagios/html/contexthelp/N2.html
/usr/share/nagios/html/contexthelp/N3.html
/usr/share/nagios/html/contexthelp/N4.html
/usr/share/nagios/html/contexthelp/N5.html
/usr/share/nagios/html/contexthelp/N6.html
/usr/share/nagios/html/contexthelp/N7.html
/usr/share/nagios/html/d3
/usr/share/nagios/html/d3/d3.min.js
/usr/share/nagios/html/docs
/usr/share/nagios/html/docs/annotated.html
/usr/share/nagios/html/docs/api_incompat3to4.html
/usr/share/nagios/html/docs/bc_s.png
/usr/share/nagios/html/docs/bdwn.png
/usr/share/nagios/html/docs/bitmap_8h.html
/usr/share/nagios/html/docs/bitmap_8h_source.html
/usr/share/nagios/html/docs/classes.html
/usr/share/nagios/html/docs/closed.png
/usr/share/nagios/html/docs/configincompat3to4.html
/usr/share/nagios/html/docs/dir_97aefd0d527b934f1d99a682da8fe6a9.html
/usr/share/nagios/html/docs/dkhash_8h.html
/usr/share/nagios/html/docs/dkhash_8h_source.html
/usr/share/nagios/html/docs/doc.png
/usr/share/nagios/html/docs/doxygen.css
/usr/share/nagios/html/docs/doxygen.png
/usr/share/nagios/html/docs/dynsections.js
/usr/share/nagios/html/docs/fanout_8h.html
/usr/share/nagios/html/docs/fanout_8h_source.html
/usr/share/nagios/html/docs/files.html
/usr/share/nagios/html/docs/folderclosed.png
/usr/share/nagios/html/docs/folderopen.png
/usr/share/nagios/html/docs/functions.html
/usr/share/nagios/html/docs/functions_vars.html
/usr/share/nagios/html/docs/globals.html
/usr/share/nagios/html/docs/globals_b.html
/usr/share/nagios/html/docs/globals_c.html
/usr/share/nagios/html/docs/globals_d.html
/usr/share/nagios/html/docs/globals_defs.html
/usr/share/nagios/html/docs/globals_e.html
/usr/share/nagios/html/docs/globals_f.html
/usr/share/nagios/html/docs/globals_func.html
/usr/share/nagios/html/docs/globals_i.html
/usr/share/nagios/html/docs/globals_k.html
/usr/share/nagios/html/docs/globals_m.html
/usr/share/nagios/html/docs/globals_n.html
/usr/share/nagios/html/docs/globals_o.html
/usr/share/nagios/html/docs/globals_p.html
/usr/share/nagios/html/docs/globals_r.html
/usr/share/nagios/html/docs/globals_s.html
/usr/share/nagios/html/docs/globals_t.html
/usr/share/nagios/html/docs/globals_type.html
/usr/share/nagios/html/docs/globals_v.html
/usr/share/nagios/html/docs/images
/usr/share/nagios/html/docs/index.html
/usr/share/nagios/html/docs/iobroker_8h.html
/usr/share/nagios/html/docs/iobroker_8h_source.html
/usr/share/nagios/html/docs/iocache_8h.html
/usr/share/nagios/html/docs/iocache_8h_source.html
/usr/share/nagios/html/docs/jquery.js
/usr/share/nagios/html/docs/kvvec_8h.html
/usr/share/nagios/html/docs/kvvec_8h_source.html
/usr/share/nagios/html/docs/libnagios_8h.html
/usr/share/nagios/html/docs/libnagios_8h_source.html
/usr/share/nagios/html/docs/lnag-utils_8h.html
/usr/share/nagios/html/docs/lnag-utils_8h_source.html
/usr/share/nagios/html/docs/menu.js
/usr/share/nagios/html/docs/menudata.js
/usr/share/nagios/html/docs/nav_f.png
/usr/share/nagios/html/docs/nav_g.png
/usr/share/nagios/html/docs/nav_h.png
/usr/share/nagios/html/docs/nsock_8h.html
/usr/share/nagios/html/docs/nsock_8h_source.html
/usr/share/nagios/html/docs/nspath_8h.html
/usr/share/nagios/html/docs/nspath_8h_source.html
/usr/share/nagios/html/docs/nsutils_8h.html
/usr/share/nagios/html/docs/nsutils_8h_source.html
/usr/share/nagios/html/docs/nwrite_8h.html
/usr/share/nagios/html/docs/nwrite_8h_source.html
/usr/share/nagios/html/docs/open.png
/usr/share/nagios/html/docs/pages.html
/usr/share/nagios/html/docs/pqueue_8h.html
/usr/share/nagios/html/docs/pqueue_8h_source.html
/usr/share/nagios/html/docs/qh.html
/usr/share/nagios/html/docs/runcmd_8h.html
/usr/share/nagios/html/docs/runcmd_8h_source.html
/usr/share/nagios/html/docs/search
/usr/share/nagios/html/docs/search/all_0.html
/usr/share/nagios/html/docs/search/all_0.js
/usr/share/nagios/html/docs/search/all_1.html
/usr/share/nagios/html/docs/search/all_1.js
/usr/share/nagios/html/docs/search/all_10.html
/usr/share/nagios/html/docs/search/all_10.js
/usr/share/nagios/html/docs/search/all_11.html
/usr/share/nagios/html/docs/search/all_11.js
/usr/share/nagios/html/docs/search/all_12.html
/usr/share/nagios/html/docs/search/all_12.js
/usr/share/nagios/html/docs/search/all_13.html
/usr/share/nagios/html/docs/search/all_13.js
/usr/share/nagios/html/docs/search/all_2.html
/usr/share/nagios/html/docs/search/all_2.js
/usr/share/nagios/html/docs/search/all_3.html
/usr/share/nagios/html/docs/search/all_3.js
/usr/share/nagios/html/docs/search/all_4.html
/usr/share/nagios/html/docs/search/all_4.js
/usr/share/nagios/html/docs/search/all_5.html
/usr/share/nagios/html/docs/search/all_5.js
/usr/share/nagios/html/docs/search/all_6.html
/usr/share/nagios/html/docs/search/all_6.js
/usr/share/nagios/html/docs/search/all_7.html
/usr/share/nagios/html/docs/search/all_7.js
/usr/share/nagios/html/docs/search/all_8.html
/usr/share/nagios/html/docs/search/all_8.js
/usr/share/nagios/html/docs/search/all_9.html
/usr/share/nagios/html/docs/search/all_9.js
/usr/share/nagios/html/docs/search/all_a.html
/usr/share/nagios/html/docs/search/all_a.js
/usr/share/nagios/html/docs/search/all_b.html
/usr/share/nagios/html/docs/search/all_b.js
/usr/share/nagios/html/docs/search/all_c.html
/usr/share/nagios/html/docs/search/all_c.js
/usr/share/nagios/html/docs/search/all_d.html
/usr/share/nagios/html/docs/search/all_d.js
/usr/share/nagios/html/docs/search/all_e.html
/usr/share/nagios/html/docs/search/all_e.js
/usr/share/nagios/html/docs/search/all_f.html
/usr/share/nagios/html/docs/search/all_f.js
/usr/share/nagios/html/docs/search/classes_0.html
/usr/share/nagios/html/docs/search/classes_0.js
/usr/share/nagios/html/docs/search/classes_1.html
/usr/share/nagios/html/docs/search/classes_1.js
/usr/share/nagios/html/docs/search/close.png
/usr/share/nagios/html/docs/search/defines_0.html
/usr/share/nagios/html/docs/search/defines_0.js
/usr/share/nagios/html/docs/search/defines_1.html
/usr/share/nagios/html/docs/search/defines_1.js
/usr/share/nagios/html/docs/search/defines_2.html
/usr/share/nagios/html/docs/search/defines_2.js
/usr/share/nagios/html/docs/search/defines_3.html
/usr/share/nagios/html/docs/search/defines_3.js
/usr/share/nagios/html/docs/search/defines_4.html
/usr/share/nagios/html/docs/search/defines_4.js
/usr/share/nagios/html/docs/search/defines_5.html
/usr/share/nagios/html/docs/search/defines_5.js
/usr/share/nagios/html/docs/search/defines_6.html
/usr/share/nagios/html/docs/search/defines_6.js
/usr/share/nagios/html/docs/search/defines_7.html
/usr/share/nagios/html/docs/search/defines_7.js
/usr/share/nagios/html/docs/search/defines_8.html
/usr/share/nagios/html/docs/search/defines_8.js
/usr/share/nagios/html/docs/search/defines_9.html
/usr/share/nagios/html/docs/search/defines_9.js
/usr/share/nagios/html/docs/search/defines_a.html
/usr/share/nagios/html/docs/search/defines_a.js
/usr/share/nagios/html/docs/search/defines_b.html
/usr/share/nagios/html/docs/search/defines_b.js
/usr/share/nagios/html/docs/search/defines_c.html
/usr/share/nagios/html/docs/search/defines_c.js
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/usr/share/nagios/html/docs/search/defines_d.js
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/usr/share/nagios/html/docs/search/files_0.js
/usr/share/nagios/html/docs/search/files_1.html
/usr/share/nagios/html/docs/search/files_1.js
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/usr/share/nagios/html/docs/search/files_2.js
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/usr/share/nagios/html/docs/search/files_3.js
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/usr/share/nagios/html/docs/search/files_4.js
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/usr/share/nagios/html/docs/search/files_5.js
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/usr/share/nagios/html/docs/search/files_6.js
/usr/share/nagios/html/docs/search/files_7.html
/usr/share/nagios/html/docs/search/files_7.js
/usr/share/nagios/html/docs/search/files_8.html
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/usr/share/nagios/html/spin
/usr/share/nagios/html/spin/spin.min.js
/usr/share/nagios/html/ssi
/usr/share/nagios/html/stylesheets
/usr/share/nagios/html/stylesheets/avail.css
/usr/share/nagios/html/stylesheets/checksanity.css
/usr/share/nagios/html/stylesheets/cmd.css
/usr/share/nagios/html/stylesheets/common.css
/usr/share/nagios/html/stylesheets/config.css
/usr/share/nagios/html/stylesheets/extinfo.css
/usr/share/nagios/html/stylesheets/histogram.css
/usr/share/nagios/html/stylesheets/histogramgraph.css
/usr/share/nagios/html/stylesheets/history.css
/usr/share/nagios/html/stylesheets/jsonquery.css
/usr/share/nagios/html/stylesheets/map-directive.css
/usr/share/nagios/html/stylesheets/map.css
/usr/share/nagios/html/stylesheets/ministatus.css
/usr/share/nagios/html/stylesheets/nag_funcs.css
/usr/share/nagios/html/stylesheets/notifications.css
/usr/share/nagios/html/stylesheets/outages.css
/usr/share/nagios/html/stylesheets/showlog.css
/usr/share/nagios/html/stylesheets/status.css
/usr/share/nagios/html/stylesheets/statusmap.css
/usr/share/nagios/html/stylesheets/summary.css
/usr/share/nagios/html/stylesheets/tac.css
/usr/share/nagios/html/stylesheets/trends.css
/usr/share/nagios/html/stylesheets/trendsgraph.css
/usr/share/nagios/html/trends-form.html
/usr/share/nagios/html/trends-graph.html
/usr/share/nagios/html/trends-host-yaxis.html
/usr/share/nagios/html/trends-links.html
/usr/share/nagios/html/trends-service-yaxis.html
/usr/share/nagios/html/trends.html
/var/log/nagios
/var/log/nagios/archives
/var/run/nagios
/var/spool/nagios/checkresults
/var/spool/nagios/cmd
References
Summary
In this tutorial we learn how to install nagios on CentOS 8 using yum and dnf.