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The Secure Shell (or SSH) is a cryptographic protocol enabling secure communication between clients and servers. In this tutorial, we are going describe how to set up SSH keys on a Debian 10 Buster instance.

Logstash is used as a data processing pipeline that aims at simplifying log ingestion, parsing, filtering and redirecting. Logstash is part of the ELK stack : Elasticsearch – Logstash – Kibana but tools can be used independently. With the recent release of the ELK stack v7.x, installation guides need to be updated for recent distributions such as Ubuntu 18.04 and Debian 9.

Docker is a platform, also referred as a PaaS (platform as a service), that provides containerization features to quickly install, deploy and test different environments. Docker is widely used in the industry and one of the fastest DevOps technologies in the industry. In today’s tutorial, we are going to see the steps needed to install Docker on Ubuntu and Debian systems

When using modern monitoring solutions, we often want to be alerted when something goes wrong in our infrastructure. We may want to receive an email if one of our hosts goes down. Or we may want to receive a message on our team Slack if HTTPS certificates are about to expire for example. In your monitoring infrastructure, setting up custom alerts is crucial. In this tutorial, we are going to take a special look at the AlertManager with Prometheus.

In today’s tutorial, we are going to see how you can add a user to sudoers on Debian distributions. The sudo command allows authorized users to perform commands as another user, which is by default the root user.

In today’s tutorial, we are going to take a look at one of the most popular monitoring stacks : Grafana and Prometheus. Prometheus is a time series database, created in 2012 and part of the Cloud Native Computing Foundation, that exposes dozens of exporters for you to monitor anything. On the other hand, Grafana is probably one of the most popular monitoring tools.

From all the existing modern monitoring tools, the TIG (Telegraf, InfluxDB and Grafana) stack is probably one of the most popular ones. This stack can be used to monitor a wide panel of different datasources: from operating systems (such as Linux or Windows performance metrics), to databases (such as MongoDB or MySQL), the possibilities are endless. In this tutorial, we are going to learn how to setup Telegraf, InfluxDB and Grafana.

If you are new to Linux administration, you may be wondering how Linux file permissions work on Linux systems.

Maybe you have been denied the read access to a file and you are trying to discover why and how to solve it. Or you may have tried to move a file from a directory to another, only to discover that you don’t have the permissions to do it.

Today, we are taking a very close look at how file permissions work on Linux

If you are a system administrator, or just a regular Linux user, there is a very high chance that you worked with Syslog, at least one time. On your Linux system, pretty much everything related to system logging is linked to the Syslog protocol. Designed in the early 80’s by Eric Allman (from Berkeley University), the syslog protocol is a specification that defines a standard for message logging on any system

Created in 2005 by Linus Torvalds, Git is by far the most commonly used distributed version control system in the world. This tool is mainly used by development teams to keep track of all the changes happening on a code base, as well as organizing code in individual branches. In today’s tutorial, we are going to see how to setup Git on a Debian 10 Buster machine.

Debian 10 has been finally released on the 6th of July 2019, and it has come with a lot of very great features for system administrators

This tutorial provides step-by-step instructions about how to install Debian 10 Buster with a GNOME desktop.

...what if we could have a centralized way to store our logs, on a remote machine?

Created in 2013, InfluxDB has established itself as one of the most used time series database. Used by many successful companies around the world like eBay, IBM or Mozilla, InfluxDB can be used in a wide variety of sectors : DevOps, monitoring, IoT and even cybersecurity!

If you are a system administrator, or even a curious application developer, there is a high chance that you are regularly digging into your logs to find precious information in them. In this tutorial, we are to build a complete log monitoring pipeline using the ELK stack (ElasticSearch, Logstash and Kibana) and Rsyslog as a powerful syslog server.

This post focuses on installing the latest version of Grafana v6.x on a Ubuntu 18.04 machine. Grafana is by far one of the most popular open source dashboard monitoring tools of 2019. Used by SpaceX, Bloomberg and Booking.com, Grafana is definitely a must-have for engineers wanting a robust and scalable dashboard monitoring solution.

Have you ever wondered how you can monitor your entire Linux system performance easily? Today we are taking a very special look at the Node Exporter, a Prometheus exporter specialized in exposing Linux metrics...

Whether you are a system administrator or a database administrator, monitoring your MySQL server is an essential step towards diagnosing issues. You want real time monitoring on active connections, locks or queries that are running on your database. You also want to monitor active users, what they are running, as well as average query times. To monitor those metrics, we are going to build a complete MySQL dashboard using modern tools such as Grafana and Prometheus.

A few days back, I was trying to solve a box and getting the root access was looking a bit tricky at first. But after thinking about it for half an hour, I was able to figure out that some basic knowledge about Linux File permissions and text editors will do the work. This article explains in-depth ways to gain root access using common file editors such as Nano and Vim.

Monitoring disk I/O on a Linux system is crucial for every system administrator. In this tutorial, we are going to build another dashboard that monitors the disk I/O usage on our Linux system, as well as filesystems and even inodes usage. not the only way to do it on a Linux system.

Whether you are a Linux system administrator or a DevOps engineer, you spend a lot of time tracking performance metrics on your servers. The goal of this tutorial is to create a complete monitoring dashboard for Linux sysadmins. This dashboard will showcase different panels that are entirely customizable and scalable to multiple instances for distributed architectures.