Monitoring

Monitoring tools, metrics collection, and alerting setup.

Reading the 1, 5, and 15 minute load averages on a Linux system

Jul 7, 2026 • 6 min read

What Is Load Average in Linux: 1, 5, and 15 Minute Averages

Load average explained for Linux: what the three numbers from uptime and top mean, how they relate to CPU cores, and how to tell a busy system from an overloaded one.

Command-line network bandwidth monitoring tools on Linux: iftop, nload, bmon, and vnstat

May 28, 2026 • 7 min read

Network Bandwidth Monitoring Tools: iftop, nload, bmon, and vnstat

Compare nload, iftop, bmon, and vnstat for checking Linux network bandwidth in real time and tracking historical traffic usage.

Checking CPU usage in Linux with terminal monitoring tools

May 15, 2026 • 8 min read

How to Check CPU Usage in Linux

This guide explains how to check CPU usage in Linux with top, htop, mpstat, vmstat, sar, ps, uptime, and per-core load tools.

Jul 30, 2020 • 3 min read

How to Install Nagios on Ubuntu 20.04

Nagios is a popular open-source monitoring system. This article explains how to install Nagios on Ubuntu 20.04.

Feb 10, 2019 • 5 min read

How to Install and Configure Nagios on Debian 9

Nagios is a popular open-source monitoring software. This tutorial explains how to install and configure the latest version of Nagios Core on Debian 9.

Jan 28, 2019 • 9 min read

How to Install and Configure Zabbix on Debian 9 Linux

Zabbix is a mature open-source software for monitoring networks and applications. This tutorial explains how to install and configure the latest version of Zabbix 4.0 on a Debian 9 Linux server using MySQL as a database back-end.

Dec 30, 2018 • 10 min read

How to Install and Configure Zabbix on CentOS 7

Zabbix is a full-featured open-source monitoring software. This tutorial describes how to install and configure the latest version of Zabbix 4.0 on a CentOS 7 server.

Dec 8, 2018 • 6 min read

How to Install and Configure Nagios on CentOS 7

Nagios is one of the most popular open-source monitoring systems. Nagios keeps an inventory of your entire IT infrastructure and ensures your networks, servers, applications, services, and processes are up and running. This tutorial describes how to install and configure Nagios Core on a CentOS 7 server.

Dec 8, 2018 • 6 min read

How to Install and Configure Nagios on Ubuntu 18.04

Nov 29, 2018 • 10 min read

How to Install and Configure Zabbix on Ubuntu 18.04

Zabbix is one of the most popular open-source monitoring software tools. This tutorial describes how to install and configure the latest version of Zabbix 4.0 on an Ubuntu 18.04 server.