How to configure multiple websites with Apache web server
Here’s how to host two or more websites on Apache, a popular and powerful web server. With name-based virtual hosting, you can use a single IP address for multiple websites. Modern web servers, including Apache, use the hostname portion of the specified URL to determine which virtual web host responds to the page request. This requires only a little more configuration than for a single site.
SpamAssassin, MIMEDefang, and Procmail: Best Trio of 2024
This trio of applications can be combined to manage server-side email sorting in a beautiful and elegant way. They are my “Best Trio,” because resolving the problem I set out to fix—effective server-side email sorting—took three pieces of software working together. Here’s how I got everything to work using SpamAssassin, MIMEDefang, and Procmail–three common and freely available open source software packages.
Using ‘awk’ to filter text
Here’s how to use awk to strip out sample code from a Markdown file.
Using the Alpine Linux email client to access messages from any network
Sometimes when I’m traveling, I have trouble sending email from my devices that typically connect to my ISP at home via hardwire or WiFi. This is because some ISPs do not like outbound email to leave their network unless it is routed through their own email servers. But you need to have an account with the ISP in order to send outbound email through their servers.
This intentional blocking of outbound port 25 for email is usually aimed at preventing hijacked hosts from acting as spambots and sending email over the ISP’s network.
Read about how I circumvented that problem.
Digging into ODT file contents
All LibreOffice files are zip file containers with XML data and metadata.
Replacing rc.local in systemd Linux systems
Missing rc.local for adding commands to run on startup?
The rc.local file was—and in some cases still is—the place for Linux sysadmins to put commands that need to be run at startup. Use of the rc.local file is not only deprecated but after a couple of hours worth of attempts, was not working in any event. This despite the fact that the systemd documentation mentions the use of a “generator” that generates systemd services from an rc.local file if one exists.
Here’s how to set up similar functionality with today’s systemd.
The Art of Problem Solving
Image by: Opensource.com Although it would be nice to believe that cars, home theater systems, computers, and Linux never break, the reality is that they...
Problem solving strategies for SysAdmins
Solving complex problems is not a straightforward proposition.
I’ve participated in plenty of technical interviews with people who had passed many certification tests and who had fine resumes. I also participated in many interviews in which we were looking for Linux skills, but very few of those applicants had certifications. Very few of the Linux applicants were yet certified.
Few of the Windows certificate owners could reason their way through the scenarios we presented while a very large percentage of the Linux applicants were able to do so.
How I fixed Random Reboots on One of My Laptops
I have three laptops that I've purchased from System76 out of Denver Colorado. They design and build exceptional laptops and install Pop!_OS, their own mix...
Managing devices in Linux
There are many interesting features of the Linux directory structure. In this article I cover some fascinating aspects of the /dev directory.
Device files are also known as device special files. Device files are employed to provide the operating system and users an interface to the devices that they represent. All Linux device files are located in the /dev directory, which is an integral part of the root (/) filesystem.
Use ‘grep’ to solve a 2-dimensional word puzzle
Regular expressions match patterns and help you solve problems.
Comparing BASIC with FORTRAN 77
I applied what I learned about BASIC to learn the FORTRAN 77 programming language.
Get started with Midnight Commander, a visual shell and file manager for Linux
Midnight Commander (MC) is a text-based Command Line Interface (CLI) program. It is particularly useful when a GUI is not available but can also be used as a primary file manager in a terminal session even when you are using a GUI. Midnight Commander can be used to interact with local and remote Linux computers using the CLI.
The man page for Midnight Commander calls it a visual shell because it’s capabilities are greater than the file manager we usually use it as. This article will provide you with enough information to get started using Midnight Commander as a file manager as well as its other capabilities.
Streamline Your Small Business with This Open Source Accounting App
Using GnuCash puts you in control of your small business.
Get Publii – Static Site Generator
You don’t need a web content management system to create and maintain websites.
A little programming goes a long way
It helps to know some programming to solve these little problems.