yannick Coffi

Founder of SNUBmonkey™ & ocularfuel.com. Systems Administrator, UX & Ul Web Designer, & Pro Photographer— Happily sharing my experiences!

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Aliases explained.

Do you often find yourself typing long commands on Terminal or searching in the history for a previously typed command? If you do, then you will find aliases super, super handy. Bash aliases allow you to set a memorable shortcut command for longer commands.

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How to Secure Apache Web Server with ModEvasive on Ubuntu Server.

Apache HTTP Server is a free and open-source web server that delivers web content through the internet. Apache is just one component that is needed in a web application stack to deliver web content. One of the most common web application stacks involves LAMP, or Linux, Apache, MySQL, and PHP.

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Setup/ Change Timezone on Linux.

System’s timezone usually sets up your Linux system to fetch Time Zone automatically; it will sync your system through the internet so that it will have the time zone of your closest location.

linux 🐧

SCP Command on Linux Systems.

SCP (Secure Copy Protocol) is a command-line tool in Linux and Unix-like (UN*X) systems that is used to transfer/ copy files and directories across the systems in a secure way over the network.

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How to Change or Set Hostname on Ubuntu Server.

The hostname is what a device is called on a network. The hostname is used to distinguish devices within a local network. In addition, computers can be found by others through the hostname, which enables data exchange within a network.

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Rename or Change User Name and UID on Linux Systems.

You might have come across a situation where you want to rename a user name in Linux system, for whatever reasons. In this short tutorial, we will be discussing how to change user name (rename user name) or UID under a Linux operating system using command line tools.

linux 🐧

Deadly Commands You Should Never Run on *nux Systems. ☠️

Whether you're a Linux newbie or veteran, you should never run a command unless you know exactly what it does. Linux can be a double-edged sword. It assumes that you know what you're doing and gives you the freedom to do whatever you want.

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Three ways to Lock and Unlock accounts on Linux Systems.

One of the most critical part of any administrator is the ability to manage user accounts. In the following article, we are going to illustrate the different ways in which a user account can be locked and unlocked in a Linux system.

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Chmod +rwx Command on Linux Systems. (Permissions)

In Linux and Unix-like (UN*X) operating systems, a set of flags associated with each file determines who can access that file, and how they can access it. These flags are called file permissions or modes, as in "mode of access."

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Soft and Hard Links on UN*X Systems.

Hard and symbolic links offer different ways to access files and directories in Linux. Hard links reference the same data on disk, while symbolic links serve as shortcuts to file paths. Both have unique benefits, making them useful tools for efficient file management and navigation.

NGINX

How to Install Nginx on Ubuntu Server & Set Up Server Blocks.

In this today tutorial, we will install and configure Nginx on Ubuntu 20.04 server adjust the firewall, manage the Nginx process, and also configure some server blocks so we can host multiple domains.

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How to Kill user tty/pts sessions on Linux Systems.

Unix login session can be killed remotely by sending a hangup signal (SIGHUP) to the process running the login session. In this How2, we will dig further into it and explain the command-line option to kill unwanted or unused or idle ttys.

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How to Redirect HTTP to HTTPS in Nginx.

Today, we will explain how to redirect the HTTP traffic to HTTPS in Nginx. How we can secure our website by redirecting all unsecured traffic on port 80 to SSL secured port 443.

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Behind the Scenes: SMTP Server.

Is send emails difficult? From a client's viewpoint, everything looks very straightforward. Under the hood, it is nothing else, complex system that drives messages from the sender to the recipient. Today, we'll be talking about a concept related to an outgoing mail server, known as an SMTP server.

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How to Configure a Firewall with UFW on Ubuntu Server.

One of the first lines of defense in securing your Ubuntu server is a well-configured firewall. In this guide, you'll learn how to set up and manage UFW (Uncomplicated Firewall) to control traffic and lock down unnecessary access — simply and effectively.

SSH 🕳

What the heck is SSH?

Secure Shell (SSH), sometimes referred to as Secure Socket Shell, is a protocol that enables secure connection to a remote computer or server through a text-based interface.

NGINX

What the heck is NGINX?

Today we will be covering NGINX, an open source web server and the main alternative and competitor to the Apache HTTP Server.

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What exactly is a daemon?

A daemon (pronounced DEE-muhn) is a program that runs continuously in the background, designed to handle periodic service requests that the system expects to receive.

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How to Configure Static IP Address on Ubuntu Server.

In this tutorial, you will learn how to configure networking in Ubuntu 20.04 with Netplan. You will learn how to set static IP addresses, DHCP addresses, as well as how to configure DNS.

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Is Linux an Operating System or a Kernel?

One of the most common questions you’ll encounter on tech forums is whether Linux is an operating system or just a kernel. Even for experienced Linux users, this question can sometimes cause confusion. 🤷‍♂️🥷🏿

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What is Linux Kernel?

The Linux kernel is the core component of the Linux operating system. It acts as a bridge between a computer’s hardware and its software applications. Here’s a more detailed breakdown of what it is and what it does: