Linux

Linux is a family of open-source Unix-like operating systems based on the Linux kernel.

What is a Cron Job and how to write to the Crontab

Updated 10th December 2023

The need to schedule tasks on a machine is common for any Software Developer, System Admin or IT professional, so it’s important to learn what a cron job is and how to write to the crontab. What is CRON? Cron is a daemon built-in to most Unix-like operating systems such as: Cron reads the¬†crontab¬†(cron tables)

IPtables – How to block and unblock IP Addresses in Linux

Updated 14th December 2023

Linux IPtables manual

Not long ago, I noticed some strange activity on a server I manage. The server, running Ubuntu 22.04, was receiving high volumes of traffic from a single IP Address. After some investigation, I decided the activity resembled that of web scrapping, so I decided to block the IP Address. Iptables or ufw I hear you

How to create Alias command in Linux

Updated 16th August 2022

GNU Bash Logo

Alias commands in Linux are a great way to speed up your workflow. In this post, I will show you how to create Alias command in Linux using Bash on WSL (Windows Subsystem for Linux). What is an Alias command? The alias command in Linux allows you to create custom shortcuts for frequently used commands.

Run Python Script on boot

Updated 16th August 2022

Writing your own Shell scripts is a great way to automate your processes. In this post, I will show you how to Run Python Script on boot. This example will be for Raspberry Pi Computers and will run a python script when the device is booted and the user has authenticated. The Python Script we

[UPDATED 2022] Change PHP version on Ubuntu, Linux

Updated 23rd August 2022

PHP

In this post, I will show you how to switch PHP version on Ubuntu, Linux. If you are developing on Windows, follow this guide to set up Windows Sub System for Linux. What will be covered: Change PHP version for Apache2 Change PHP version for Nginx Change PHP CLI version In this example, we will

How to Upload and Download files to and from a Linux server over SSH

Updated 16th August 2022

Its common place to need to upload and download files to and from a remote Linux server. To upload and download files from a remote Linux server you can use the scp (secure copy) command. To download a file you can use: To upload a file you can use: scp /path/to/file/your/uploading username@ip-or-server-name:/path/to/location/to/upload/to Note: It is

How to generate an SSH key and add to authorized_keys

Updated 16th August 2022

In this article we explain how to generate a SSH key for your local machine and add your public key to the authorized_keys on a remote server. Generate an SSH key for Windows, MAC and Linux Note: If you are using Windows, we recommend you use a SSH client like PuTTY. For MAC/Linux run: ssh-keygen

The ULTIMATE guide to setup Windows Subsystem for Linux (WSL) with Ubuntu, Apache2, MySQL and PHP

Updated 16th August 2022

Ubuntu

Windows is now good for development! Yes! All thanks to Windows Subsystem for Linux (WSL). No more WAMP or Xampp, WSL can do everything you need. In this ultimate guide to setup Windows Subsystem for Linux with Ubuntu, Apache2, MySQL, and PHP we will cover: What is Windows Subsystem for Linux? Setting up Windows Subsystem