Some of the most compelling advantages of systemd are those involved with process and system logging. Using other systems, logs are usually dispersed throughout the system, handled by different daemons and tools, and ...

In this tutorial, we will go over the installation of the Elasticsearch ELK Stack on Ubuntu 14.04—that is, Elasticsearch 2.2.x, Logstash 2.2.x, and Kibana 4.4.x. We will also show you how to configure it to gather and...

When running multiple services and applications on a...

In this tutorial, we will go over the installation of the Elasticsearch ELK Stack on CentOS 7—that is, Elasticsearch 2.1.x, Logstash 2.1.x, and Kibana 4.3.x. We will also show you how to configure it to gather and vis...

An effective logging solution is crucial to the success of any application. In this guide we'll focus on a logging package called Winston, an extremely versatile logging library and the most popular logging solution a...

Logrotate is a system utility that manages the automatic rotation and compression of log files. If log files were not rotated, compressed, and periodically pruned, they would eventually consume all available disk spac...

The Kibana interface is divided into four sections: Discover, Visualize, Dashboard, and Settings. In this tutorial, we will go over the basics of each section, and demonstrate how each section can be used.

In this tutorial for CentOS 7, you will learn how to install all of the components of the Elastic Stack, a collection of open-source software produced by Elastic which allows you to search, analyze, and visualize logs...

In recent years, Linux distributions have increasingly migrated away from other init systems to systemd. The systemd suite of tools provides a fast and flexible init model for managing an entire machine, from boot onw...

In this tutorial, we will go over the installation of Logstash 1.4.2 and Kibana 3, and how to configure them to gather and visualize the syslogs of our systems in a centralized location. Logstash is an open source too...

In this tutorial, we will go over the installation of the Elasticsearch ELK Stack on Ubuntu 16.04 (that is, Elasticsearch 2.3.x, Logstash 2.3.x, and Kibana 4.5.x). We will also show you how to configure it to gather a...

Once your application is up and running in a cloud server environment, you may be wondering how you can improve your server environment to make the leap from "it works" to a full-fledged production environment. This a...

Linux and the applications that run on it can generate all different types of messages, which are recorded in various log files. Linux uses a set of configuration files, directories, programs, commands and daemons to ...

Rsyslog, Elasticsearch, and Logstash provide the tools to transmit, transform, and store your log data. In this tutorial, you will learn how to create a centralized rsyslog server to store log files from multiple syst...

Following in the footsteps of our previous articles on Linux system hardening, security monitoring and emailing alerts, in this DigitalOcean article we will talk about Logwatch: a very powerful log parser and analyzer...

IP Geolocation, the process used to determine the physical location of an IP address, can be leveraged for a variety of purposes, such as content personalization and traffic analysis. In this tutorial, we will show yo...

Understanding the logging mechanisms of your server will help you diagnose problems and avoid larger problems down the road. In this article, we will explore Nginx's logging capabilities. We will discuss the configu...

Apache can be configured to log a large quantity of information to help you diagnose problems and keep an eye on activity. In this guide, we will discuss how Apache handles logging and how you can create your own cus...

The Linux Auditing System helps system administrators create an audit trail, a log for every action on the server. We can track security-relevant events, record the events in a log file, and detect misuse or unauthori...

This tutorial is an ELK Stack (Elasticsearch, Logstash, Kibana) troubleshooting guide. It is structured as a series of common issues, and potential solutions to these issues, along with steps to help you verify that t...