Do you want to know how to develop your skillset to become a sysadmin Rockstar?
Subscribe to our newsletter to start Rocking right now!
To get you started we give you our best selling eBooks for FREE!
1. Introduction to NGINX
2. Apache HTTP Server Cookbook
3. VirtualBox Essentials
4. Nagios Monitoring Cookbook
5. Linux BASH Programming Cookbook
and many more ....
I agree to the Terms and Privacy Policy

Nagios alternatives: Centreon and Icinga

This article is part of our Academy Course titled Nagios Tutorial for IT Monitoring. In this course, we provide a compilation of Nagios tutorials that will help you set up your own monitoring infrastructure. We cover a wide range of topics, from installation and configuration, to plugins and NRPE. With our straightforward tutorials, you will be able to get your ...

Read More »

Elasticsearch Throttling Indexing

Recent adventures in Zapierland had me in a somewhat scary predicament. Starting at some point last week I’d get an alert that the Elasticsearch cluster we run Graylog against had hit very high CPU, load and memory usage. I was confused… we had more than enough horsepower to handle queries and normally the cluster only uses about 10% of CPU ...

Read More »

Linux IfConfig Tutorial

The network configuration is one of the first topics a system administrator gets involved with. For Linux, the command to configure this is ifconfig (contraction of interface and configuration), which allows to make almost any configuration in a network, as we will see in this tutorial. Basic knowledge about networking (what IP addresses are, their format, subnetting, etc.) is assumed ...

Read More »

Nagios monitoring through SNMP

This article is part of our Academy Course titled Nagios Tutorial for IT Monitoring. In this course, we provide a compilation of Nagios tutorials that will help you set up your own monitoring infrastructure. We cover a wide range of topics, from installation and configuration, to plugins and NRPE. With our straightforward tutorials, you will be able to get your ...

Read More »

Linux Find Command Tutorial

Linux find command is a powerful and flexible search tool that not only every system administrator must master, but also any kind of Linux user. This tutorial will show how to use it to perform almost any type search with this useful command. For this tutorial, Linux Mint 17.3 and find 4.4.2 have been used. 1. Find by file name The ...

Read More »

Nagios Core Installation and Configuration on Ubuntu Server

This article is part of our Academy Course titled Nagios Tutorial for IT Monitoring. In this course, we provide a compilation of Nagios tutorials that will help you set up your own monitoring infrastructure. We cover a wide range of topics, from installation and configuration, to plugins and NRPE. With our straightforward tutorials, you will be able to get your ...

Read More »

Add ssl to Mysql and Postgresql

Adding ssl support to a relational database like mysql or postgresql is a standard task. First we need to have our certificates ready. We can either use mysql workbench which has a nice wizard. Or we can create them using openssl. In the end we will end up with three files ssl-ca=ca.pem ssl-cert=server-cert.pem ssl-key=server-key.pem We can also check that everything is ok ...

Read More »

Replacing Text in Nginx with sub_filter

Sometimes you find yourself in a weird predicament. A third party application that you’ve slapped nginx in front of insists on using internal IP addresses or ports despite your reverse proxy passing all the correct headers and other pieces required. Or maybe you’ve found yourself in the situation I found myself in last week where you have a third party ...

Read More »