Category: Uncategorized

Illustration of two computers connected to an external network through a router

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.

Logs being moved into a storage box next to the server

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.

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Linux systemctl: Check and Manage Services

Learn to inspect, start, stop, and restart systemd services, configure boot enablement, review logs, and reload unit definitions.

Illustration of files moving between folders on two servers

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.

jb featured image apache http server

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.

Software upgrade represented by blocks stepping up beside the server and an upward arrow

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.

Image showing a USB memory next to a laptop with on-screen recording display

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.

Network traffic that passes or is blocked by the firewall and the server

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.

Illustration of taking documents out of a compressed file and saving them to a server folder

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.

A diagram showing the path blocked between the server and the folder.

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.