Easy VPN Setup with WireGuard Manager
Set up a WireGuard VPN in minutes with wireguard-manager, a free script for Debian and Ubuntu: install, add or remove clients and generate mobile QR codes.
Tutorials
Mastering OpenStack: A Beginner’s Guide Video Series
A 5-part OpenStack video series for beginners: install it on Ubuntu in VirtualBox, launch instances, set up networking and SSH, upload images, use the CLI.
Mastering grep: A Quick Guide to Searching Text in Files on macOS and Linux
Learn grep with practical examples: case-insensitive, recursive and whole-word searches, line numbers, excluding matches and filtering logs on Linux and Mac.
How to Set Up Matrix/Synapse Server with Docker
Commands to self-host a Matrix Synapse chat server: install Docker, deploy Synapse with Docker Compose and create users. Follow along with the video.
How to Install Java on Debian-based Linux
Install Java on Ubuntu, Debian and other Debian-based Linux: check your version, choose an OpenJDK or JRE package, install it and set the default.
OpenSSH Step-by-Step Tutorial
Learn to connect to a remote server with OpenSSH: password authentication, key-based login with SSH keys and connecting on a non-default port. Video guide.
Set Up X11 Forwarding for Remote Graphical Applications
Run graphical apps from a remote server over SSH: install an X server (XQuartz, Xming), enable X11Forwarding in sshd_config and connect with ssh -X or -Y.
Installing Graylog 5 on Debian: A Step-by-Step Guide
Install Graylog 5 on Debian step by step: dependencies, MongoDB, Elasticsearch and the Graylog server, configured and ready to start collecting logs.
Enable the Root User on macOS
Check whether the root user is enabled on macOS, then enable or disable it from the Terminal with dsenableroot. Plus why you should be careful doing it.
Exploring Oracle Cloud’s Free Tier: Unleash the Power of Cloud Computing
What Oracle Cloud's Free Tier includes, how the Always Free services work, and practical use cases for running websites, apps and labs at no cost.
Configure MFA for SSH with Google Authenticator
Add multi-factor authentication to SSH on Ubuntu with libpam-google-authenticator: set up the app, configure PAM and sshd_config, and require MFA per user.
Enable SSH Password Authentication
Cloud servers disable SSH password login by default. Here's how to enable PasswordAuthentication in sshd_config, restart SSH and log in with a password.
How to Keep Oracle from Reclaiming Your Always Free Instances
Got Oracle's idle-instance warning email? Three ways to keep your Always Free OCI compute instances from being stopped and reclaimed for low usage.
How to Install the ionCube Loader on HestiaCP
Install the ionCube Loader on a HestiaCP server so PHP can run ionCube-encoded files: download the right package (incl. ARM64), add it to php.ini, restart.
How to Uninstall Java from macOS
Completely uninstall Java from macOS: check your installed version, find the JDK in /Library/Java/JavaVirtualMachines and remove it from the Terminal.
Install WireGuard VPN on Ubuntu Server
Install and configure a WireGuard VPN on a headless Ubuntu server: generate keys, set firewall rules and connect desktop and mobile clients. Video included.
How to Create a Bootable USB from an ISO on Mac Using Terminal
Create a bootable USB drive from an ISO on macOS using only Terminal: find the disk with diskutil, unmount it and write the image with dd. No extra apps.
Host WordPress for Free on an Always Free Oracle Cloud Server
Host WordPress for free on an Always Free Oracle Cloud server: DNS, iptables, Apache, PHP, MariaDB and a free Let's Encrypt SSL certificate, step by step.
Install and Set the Default Java JDK Version on macOS
Install the latest Java JDK on macOS, switch the default Java version with JAVA_HOME and uninstall JDKs you no longer need, all from the Terminal.
Free Minecraft Server on Oracle Cloud Free Tier
Run a free Minecraft Java server on Oracle Cloud's Always Free tier: open port 25565, install Java 17 and keep the server running in a screen session.