how to 🪄

A collection of 66 posts

how to 🪄

Using the SSH Client Config File ~/.ssh/config.

Imagine you have to regularly connect to +15 remote systems over SSH. That means to remember all of the remote IP addresses, different usernames, non-standard ports, what authentication keys to use, and various command-line. Quite a big waste of time. Fortunately, SSH allows you to generate a config file that

how to 🪄

SSH Key-Based Authentication & how to SSH *Without a Password.

So how do you remotely connect to a Linux system? There are multiple available tools out there for remote logins but when it comes to Linux, SSH is the unicorn choice. The Secure Shell (SSH) is a protocol that /provides a secure encrypted connection between two hosts over an insecure

terminal

49 Most-Used Linux Commands You Should Know

The Linux command line is a text-based computer interface. It's also known as the Shell, Terminal, Console, CLI, or Prompt, just to name a few. Any graphical user interface (GUI) is nothing more than a graphical representation of command-line applications.

how to 🪄

How to: Use Postfix to Outbound Email as Gmail Relay on Ubuntu - 2-step verification (Update !!!)

Postfix is a mail transfer agent (MTA) a software that implements Simple Mail Transfer Protocol (SMTP). They transport E-Mail messages from one computer to another. MTAs talk to other MTAs, and either * deliver mail locally * or hand it off for delivery to an mail delivery agent (MDA)/LDA if it

how to 🪄

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...

how to 🪄

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.

how to 🪄

How to Enable/Disable Services on Ubuntu Systemd. (Update !!!)

Sometimes we require some services to start up automatically at boot up, such as web servers or ssh, and other times we need to terminate services that we no longer require and are eating CPU and RAM up.

how to 🪄

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.

how to 🪄

How to Remove Packages Using the Command Line in Linux.

Apt The apt command is a powerful command-line tool, which works with Ubuntu’s Advanced Packaging Tool (APT) performing such functions as installing new software packages, upgrading existing software packages, updating the package, upgrading the entire Ubuntu system, and even removing packages. List installed packages You can list all installed

linux 🍹

Most Useful Nano Commands and Shortcuts.

Working under any Linux Server involves lots and lots of files configuration. Some use Vi, Vim, or Emacs, yet powerful but somehow tedious to learn. For those who need a more simple and versatile text editor, there is nano. GNU nano is a small and friendly text editor. Besides basic

tips 🪤🎉

How to Remotely Reboot your Server.

This is the fifth 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...

linux 🍹

The Differences between Sudo and Su in Linux.

Somehow confused about when to use one over the other su and sudo commands? Well, this article will help you sort them out.

how to 🪄

Most efficient way to Empty File Content in Linux.

In some situations, you might want to empty an existing file to a zero-length. In another word, removing the file contents without deleting the file. Is that even possible?

how to 🪄

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.

how to 🪄

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"

how to 🪄

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

how to 🪄

Working with pipes || on Linux.

No, no, nooo... not the PVC one!!! ... but this command-line pipe is just as useful, and its hold a ton of value for system administrators. The | command is called a pipe. It's a form of redirection in Linux used to connect the STDOUT of one command into the STDIN of a second command.

how to 🪄

passwd Command.

Both Linux and UNIX-like (UN*X) operating systems use the passwd command to change user's password. The passwd is used to update a user’s authentication token (password) stored in /etc/shadow file. The passwd change passwords for user and group accounts.

how to 🪄

Install & Use Glances to monitor Ubuntu Server.

Whether you're a system administrator or a casual desktop user, you've probably heard of the most popular terminal-based system monitoring tools, TOP, and its colorful, feature-rich cousin-in-law HTOP. 😬😅

how to 🪄

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.

how to 🪄

How to resolve LAN hostnames on Ubuntu Server.

Although we are accustomed to using names (i.e, www.snubmonkey.com) when surfing the Internet, the Internet is pretty much based on numbers known as IP addresses.

how to 🪄

How to Kill SNAP on Ubuntu Server.

Packages in Linux are managed and distributed via repositories. Package management in Debian-based distributions is officially handled by APT (Advanced Packaging Tool). And of course; as you would have guessed snap is another package management systems.

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.