This tutorial will give an insight to regular expressions without going into particularities of any language. We will simply use egrep to explain the concepts. Regular expressions are templates to match patterns (or sometimes not to match patterns). They provide a way to describe and parse text.
SSH, o blindaje seguro (secure shell) es un protocolo encriptado para administrar y comunicarse con servidores. Al trabajar con servidores Ubuntu, generalmente pasarás la mayor parte del tiempo conectado mediante SSH desde una terminal a tu servidor. En esta guía, nos…
Learning how to manage users effectively is an essential skill for any Linux system administrator. In this guide, you’ll learn to add and delete users and assign sudo privileges on a Debian 8 server.
One of the easiest way of guarding against out-of-memory errors in applications is to add some swap space to your server. In this guide, we will cover how to add a swap file to an Ubuntu 18.04 server.
In this guide, you will configure a component of the systemd suite of tools to relay log messages from client systems to a centralized log collection server. You will configure the server and client to use TLS certificates to encrypt the log messages as they are transmitted across insecure networks such as the internet and also to authenticate each other.
Ordinarily, you connect to an SSH server using a command line app in a terminal, or terminal emulator software that includes an SSH client. Some tools, like Python’s [WebSSH](https://pypi.org/project/webssh/), make it possible to instead connect over SSH and run a terminal directly in your web browser.
Der Sudo-Befehl ist nützlich, um Befehle mit Berechtigungen auszuführen, die normalerweise außerhalb des Bereichs Ihres Benutzers liegen. In diesem Leitfaden wird erläutert, wie Sie die Konfigurationsdatei bearbeiten, um die Funktionsweise von Sudo anzupassen.
Preparing a new disk for use on a Linux system can be quick and easy. There are many tools, filesystem formats, and partitioning schemes that may complicate the process if you have specialized needs, but if you want to get up and running quickly, it’s fairly…
Learn how to read, set, export, and persist environment and shell variables on Linux using Bash commands like printenv, env, set, and export.
SSH keys provide a more secure method of logging into a server than using a password. With SSH keys, users can log into a server without a password. This tutorial explains how to generate, upload, and use an SSH key pair, and optionally how to disable password-based SSH authentication.
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