yannick Coffi

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

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Upgrade from Ubuntu 20.04 LTS to 22.04 LTS Server

Ubuntu 22.04 is a Long-Term Support (LTS) release and will receive ongoing app updates and critical security fixes for the next five years. New Linux kernel releases and graphics driver updates are also rolled out as software updates every six months or so. Ubuntu 22.04 brings a ton

tips

Ghost 5+ -- How to Migrate From MariaDB 10.x to MySQL 8.x

This is the sixth in a series of posts featuring Protips, tips, tricks, hacks, and secrets provided by Our Team 🙊 — We want to share our top tips for the growing and thriving Linux community out there. Because sometimes you need a little help...

security 🦾🦿

Is 256-bit SSL Encryption any Safe?

SSL certificates enable encrypted connections between a client and a web server via the transport layer security (TLS) protocol. Nobody can intercept a message while it’s being transmitted over an encrypted connection. Again, it does not protect your website from getting hacked.

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Build and Install htop 3 on Ubuntu.

Htop is a command-line utility that allows you to interactively monitor your running system’s vital resources processes in real-time which are currently managed by the Linux Kernel. It's a little bit like its counterpart 'top' but on steroids.

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Managing Users.

Linux is a multi-user operating system, which means that several users can interact the system at the same time. As a system administrator, you are in charge of managing the system's users and groups, which includes adding and deleting users and assigning them to various groups.

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User authentication process.

Have you ever asked yourself how the user authentication process works? Let's jump. What is User Authentication? User authentication is a security process that covers all of the human-to-computer interactions that require the user to register and log in. Simply said, authentication asks each user: 'who the

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How to Remotely Reboot your Server.

linux 🐧

The Differences between Sudo and Su in Linux: A Beginner’s Guide.

Confused about when to use su versus sudo? This tutorial will clarify the differences between the two commands, explain when each is appropriate, and guide you on how to use them effectively for better system management and security.

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Why do some lines in the SHELL' history end with "*"

This is the first in a series of posts featuring Protips, tips, tricks, hacks, and secrets provided by Our Team 🙊 — We want to share our top tips for the growing and thriving Linux community out there. Because sometimes you need a little help...

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Using Monit to Monitor Linux Daemon, CPU, Filesystem, Network and Files on Ubuntu Server.

Services on any server must be operational and perform their duties effectively. It is critical to monitor the overall state of your server, including processes, programs, directories, files, and so on. This is known as system monitoring.

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Running commands over SSH.

Have you ever wanted to send a command or a script to a remote computer without ever actually logging in to the shell? - well, SSH (Secure Shell) is your friend. Let's say you would like to check your server process activity by using the "top"

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v2.wttr.in: Your Weather Forecast right in your Terminal.

v2.wttr.in is a console-oriented weather forecast service that supports various information representation methods like terminal-oriented ANSI-sequences for

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Edit /etc/hosts/ in Linux.

The hosts file is a local file or local DNS system that contains a static table lookup for hostnames and IP addresses. It is used to map domain names to IP addresses and can also be used as an alternative to DNS. It is available in all operating systems, including Windows, Linux, and macOS.

security 🦾🦿

How to Check if Your iPhone is Infected with Pegasus Spyware.

Concerned about recent revelations of widespread political espionage? On the list: Journalists, activists, prime ministers, presidents and a king identified over 1,000 people in 50 countries who were allegedly under surveillance using the Pegasus spyware.

security 🦾🦿

Security Auditing on Ubuntu Server using Lynis.

Lynis is a free and open source host-based auditing tool for UNIX-like operating systems. It scans the system for security information, general system information, configuration mistakes, security issues, user accounts without a password, wrong file permissions, firewall auditing, and so on.

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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.

linux 🐧

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.