Server Monitoring

36 Guides Available

How to Install LibreNMS for Network Monitoring

LibreNMS is an open-source network monitoring tool with a wide range of features including auto-discovery, alerting, extensive distribution support, and support for multiple networking protocols. In this guide, learn how to set up a LibreNMS instance with Docker, how to deploy agents for monitoring, and how to navigate the interface.

A Complete Guide to System Monitoring Software

“You can’t manage what you can’t measure” is a business school axiom that applies equally well to the IT world. After all, a lack of visibility into key systems can lead to trouble.

How to Use Zabbix

Zabbix is a versatile open-source monitoring tool for tracking the performance and availability of various network components. It includes an intuitive user interface and supports a powerful notification system. This guide briefly provides some background on Zabbix and explains how to configure and use it.

How to Install Nagios on CentOS 8

Nagios offers a popular and powerful tool for server monitoring. With a built-in dashboard, alert and notification capabilities, and a range of plugins, Nagios can meet most needs.

Setting Up the Adagios Web Interface for Nagios

Adagios offers a more intuitive interface for observing and configuring the Nagios server-monitoring system. Adagios has the key features from Nagios readily available, while keeping the messier details out of the way.

How to Install and Configure Prometheus and Grafana on Ubuntu

Most administrators want to have a comprehensive overview of how their servers are performing. Having visibility of server CPU, memory, and I/O statistics helps them discover and isolate issues before they can cause problems. Prometheus offers a robust node monitoring solution for collecting useful statistics from client nodes. In conjunction with the Grafana visualization solution, Prometheus allows users to visually monitor core server statistics.

Configuring Nagios Alerts on Debian 10 and Ubuntu 20.04

Nagios, a popular tool for monitoring servers, comes with a robust web interface to help you effectively manage your server. Its dashboard makes it relatively easy to check in on the hosts and services running on your machine and quickly learn of any issues.

Install Nagios on Debian 10 and Ubuntu 20.04

Monitoring tools play an important part in effectively operating production servers. They can help you keep tabs on a server’s status and quickly catch any issues that might arise. Nagios is a popular solution, providing monitoring and alerts for your server and the applications and services running on it. The wide array of plugins available for Nagios make it adaptable to your needs.

Linux System Monitoring Fundamentals

The only way to know that your Linux-server-based applications and services are running well is to measure what’s going on in the server and its connectivity status. Linux system monitoring tools reassure you when things are working right, and help you recognize odd behavior, performance anomalies, and their source when the server misbehaves. Once you’ve mastered these dedicated applications – most of which are built into the operating system – you’ll be well on your way to Linux system administrator expertise.

Using Monitorix for System Monitoring

Monitorix is a free, open-source system monitoring tool that keeps track of several Linux services and system resources. This Linux system monitoring tool is composed of two programs. The first, monitorix, is a system data logging daemon written in Perl. The second, its web interface, uses the CGI script, monitorix.cgi.

Using Nethogs to Monitor Network Usage

Nethogs is a free, open-source program used to track network usage. It extends the net top tool to track bandwidth by process. For example, net top may show that outbound traffic increased on a Linux server by protocol or subnet. But nethogs makes it easier for Linux administrators to identify which process is generating the usage spikes.

Using the System Activity Reporter (sar)

The System Activity Reporter (Sar) is a utility program for analyzing Linux system performance. Sar is a do-it-all monitoring tool that is part of the Sysstat system resource utilities package. Linux administrators should learn sar for its wide range of utility features. It measures CPU activity; memory/paging; interrupts; device load; network; process and thread allocation; and swap space utilization. Data is gathered in the /proc filesystem. By default, sar collects data once for every 10-minute mark of each hour. This guide shows you how to install and configure sar on your Debian or Ubuntu Linux system. You also learn several useful commands to get you started collecting data about your Linux system’s activity.

Monitoring Your System with Graphite and a Grafana Dashboard

What are Graphite and Grafana?

Graphite is an open-source monitoring tool for storing and viewing time series data. It does not collect data, but has a simple interface and integrates easily with third-party tools. Grafana allows you to connect to a Graphite installation (or other data source) and build dashboards to view and analyze the data.

Monitor Remote Hosts with Icinga

Install Icinga 2 Monitoring on Debian 9

How to Install and Configure Graylog2 on Debian 9

What is Graylog?

Graylog is a powerful, free, open-source log management and analysis tool that can be used for monitoring SSH logins and unusual activity to debugging applications. It is based on Java, Elasticsearch, and MongoDB and provides a beautiful web interface for centralized log management and log analysis.

Install Nagios 4 on Ubuntu and Debian 8

Deploy Graphite with Grafana on Ubuntu 14.04

Installing Monit for Server Monitoring

Keeping tabs on your servers can be time-consuming. You need to make sure connectivity is good, processes are running but not running away, resources are available, and system health is good. Whether you have one server or many, it’s something you may not do as often as you should.

Monitor System Logs with Logwatch

Logwatch is a log parsing program that analyzes and generates daily reports on your system’s log activity. Logwatch does not provide real time alerts, but instead creates a digest organized by systems for ease of review. More advanced users can also pair Logwatch with custom analysis scripts to fine-tune their reports.

Using top to Monitor Server Performance

Viewing a server’s processor activity in real-time can aid in discovering and diagnosing any problems in CPU and memory usage. The top command is a Linux process manager that can assist with monitoring.

Install and Configure OSSEC on Debian 7

Monitor Services with Nagios on Ubuntu 12.04

Nagios is a monitoring tool that allows you to monitor services on a single server or a pool of servers. It can keep an eye on a broad range of network services, including SMTP and POP3 (email), HTTP (web), ICMP (ping), and SSH. In addition to simple uptime monitoring, Nagios also allows administrators to create their own plugins to monitor additional services or devices.

Use Cacti to Monitor Resource Utilization on Ubuntu 12.04

The Linode Manager provides some basic monitoring of system resource utilization, which includes information regarding Network, CPU, and Input/Output usage over the last 24 hours and 30 days. While this basic information is helpful for monitoring your system, there are cases where more fine-grained information is useful. The simple monitoring tool Munin is capable of monitoring needs of a small group of machines. In some cases, Munin may not be flexible enough for advanced monitoring needs.

Deploy Munin to Monitor Servers on Ubuntu 12.04

The Linode Manager provides some basic monitoring of system resource utilization, which includes information regarding Network, CPU, and Input/Output usage over the past 24 hours and 30 days. While this basic information is helpful for monitoring your system, there are cases where more fine-grained information is useful. For instance, if you need to monitor memory usage or resource consumption on a per-process level, a more precise monitoring tool like Munin might be helpful.

Monitoring Servers with Zabbix

Zabbix is an open source software application that can monitor servers, networks, and applications. You can use Zabbix with any of our plans, and it works on every Linux distribution we offer. Full hardware and software requirements can be found on the Zabbix requirements page.

Monitoring Servers with Munin on Ubuntu 11.04 (Natty)

The Linode Manager provides some basic monitoring of system resource utilization, which includes information regarding Network, CPU, and Input/Output usage over the last 24 hours and 30 days. While this basic information is helpful for monitoring your system, there are cases where more fine-grained information is useful. For instance, if you need to monitor memory usage or resource consumption on a per-process level, a more precise monitoring tool like Munin might be helpful.

Monitoring Servers with Munin on Debian 6 (Squeeze)

The Linode Manager provides some basic monitoring of system resource utilization, which includes information regarding Network, CPU, and Input/Output usage over the last 24 hours and 30 days. While this basic information is helpful for monitoring your system, there are cases where more fine-grained information is useful. For instance, if you need to monitor memory usage or resource consumption on a per-process level, a more precise monitoring tool like Munin might be helpful.

Nagios Server Monitoring

Nagios is a flexible monitoring system framework that makes it possible to maintain consistent monitoring of a broad range of infrastructural components. Many users use Nagios to monitor a broad range of network services over protocols that include SMTP and POP3 (email), HTTP (web), ICMP (ping), and SSH. In addition to simple uptime monitoring, Nagios also contains features for advanced notification and graphing as well as an extensible plugin architecture that allows users to develop simple plugins for accessing unique monitoring information and providing customized reports.

Monitor Services with Nagios on Gentoo Linux

Nagios is a monitoring tool that makes it possible to monitor services on a single server or a pool of servers. It provides the capability to monitor a broad range of network services including SMTP and POP3 (email), HTTP (web), ICMP (ping), and SSH. In addition to simple uptime monitoring, Nagios also allows administrators to create their own plugins to monitor additional services or devices.

Monitor Services with Nagios on Ubuntu 10.10 (Maverick)

Use vmstat to Monitor System Performance

Monitor Services with Nagios on Ubuntu 10.04 (Lucid)

Monitoring Servers with Munin on Ubuntu 10.04 (Lucid)

The Linode Manager provides some basic monitoring of system resource utilization, which includes information regarding Network, CPU, and Input/Output usage over the last 24 hours and 30 days. While this basic information is helpful for monitoring your system, there are cases where more fine-grained information is useful. For instance, if you need to monitor memory usage or resource consumption on a per-process level, a more precise monitoring tool like Munin might be helpful.

Monitor Services with Nagios on Debian 5 (Lenny)

Nagios is an open source monitoring tool that monitors services within a server cluster. In addition to monitoring services such as SMTP/POP3 and HTTP, Nagios can also be used to check the health of the server itself.

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Install Icinga 2 Monitoring on Debian 9

How to Install and Configure Graylog2 on Debian 9

What is Graylog?

Install Nagios 4 on Ubuntu and Debian 8

Deploy Graphite with Grafana on Ubuntu 14.04

Installing Monit for Server Monitoring

Monitor System Logs with Logwatch

Using top to Monitor Server Performance

Install and Configure OSSEC on Debian 7

Monitor Services with Nagios on Ubuntu 12.04

Use Cacti to Monitor Resource Utilization on Ubuntu 12.04

Deploy Munin to Monitor Servers on Ubuntu 12.04

Monitoring Servers with Zabbix

Monitoring Servers with Munin on Ubuntu 11.04 (Natty)

Monitoring Servers with Munin on Debian 6 (Squeeze)

Nagios Server Monitoring

Monitor Services with Nagios on Gentoo Linux

Monitor Services with Nagios on Ubuntu 10.10 (Maverick)

Use vmstat to Monitor System Performance

Monitor Services with Nagios on Ubuntu 10.04 (Lucid)

Monitoring Servers with Munin on Ubuntu 10.04 (Lucid)

Monitor Services with Nagios on Debian 5 (Lenny)

Monitoring Resource Utilization with Cacti on Debian 5 (Lenny)

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Server Monitoring

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