Arul's Blog Posts

How to Monitor Let's Encrypt Certificate Expiry Dates
Bash script on monitoring local Let's Encrypt SSL certificates. This runs as a cron job.... continue reading

{ updated: 2025-02-01 22:14:13 }

How to Change the Author of a Git Commit
Tutorial on how to change the author name and email address of an existing git commit.... continue reading

{ updated: 2025-01-29 22:20:19 }

{ updated: 2025-01-29 21:44:02 }

How to install Raspberry Pi OS bullseye on a Raspberry Pi Zero or Zero 2 W using rpi-imager
Blog post on installing Raspberry Pi OS bullseye Debian 11 on a Raspberry Pi Zero or Zero 2 W. Most of these instructions should work on a regular Raspberry Pi as well.... continue reading

{ updated: 2025-01-29 21:19:52 }

How to Generate Self-Signed SSL certificate using OpenSSL
How to create self-signed SSL certificate in one line command. This generates ssl certificate and key and uses the openssl command.... continue reading

{ updated: 2025-01-26 22:37:43 }

How to Install the Latest Nginx Version 1.27 on Debian 12 bookworm
Tutorial on how to install Nginx web server Mainline version on Debian 11 bullseye or 12 bookworm.... continue reading

{ updated: 2025-01-22 15:21:58 }

How to Set Up and Secure Your Linode Server
Tutorial on steps taken to set up and strenghten your new Linode server. We will show how to install Debian 12, set up firewall, accounts, etc.... continue reading

{ updated: 2025-01-21 22:50:08 }

How to Flatten a List of Lists in Python
Tutorial showing different ways to flattenn a list of lists in Python. Includes recursive and iterative methods.... continue reading

{ updated: 2025-01-21 22:09:18 }

How to Import CSV and Pipe-Delimited Files to SQLite Tables
Blog post on how to import CSV and pipe-delimited files into SQLite tables.... continue reading

{ updated: 2025-01-10 07:21:05 }

How to Rename Local and Remote Git Branch
Tutorial on how to rename local and remote git branches... continue reading

{ updated: 2024-12-29 02:31:36 }

Page #3