Category: Uncategorized

Linux: How to Find the Default Gateway
Find IPv4 and IPv6 default gateways with ip route, inspect the selected route for a destination, and understand multiple routes.

Ubuntu 16.04 Server: Install and Configure logrotate
Learn how logrotate execution schedules and rotation conditions work, test rotation and compression with an isolated log, and review production considerations.

Linux systemctl: Check and Manage Services
Learn to inspect, start, stop, and restart systemd services, configure boot enablement, review logs, and reload unit definitions.

Linux rsync: How to Synchronize Files Locally and over SSH
Learn how to use rsync for local and remote file synchronization, including trailing slashes, dry runs, exclusions, deletion, and SSH.

Apache: How to Display a Directory Listing
Learn when Apache displays a directory listing, how to enable it for a specific directory, and how to check access and disable the listing.

Ubuntu 18.04 Server: How to Upgrade PHP Safely
Before changing PHP on Ubuntu 18.04, this explains how to check the support range and compatibility, install and verify PHP on a new test server, and then safely switch.

How to Create an Ubuntu Installation USB
This explains the process of creating an installation USB with Rufus and Ubuntu ISO on Windows. It also covers device selection, data backup, boot verification, and troubleshooting.

How to Configure a Firewall with UFW on Ubuntu 22.04 Server
This explains how to safely enable UFW on an Ubuntu Server and manage SSH, service ports, and IP-specific access rules.

Ubuntu 22.04 Server / How to Extract ZIP Files
This explains how to check the contents of a ZIP file with unzip on an Ubuntu server and extract it to the desired location. It also looks at how to handle overwriting and check for errors.

Ubuntu 16.04 / Apache / How to Fix Access to the javascript Folder
Explains how to diagnose 403·404 errors occurring in Apache's /javascript path and how to distinguish between alias conflicts from javascript-common and other causes.