linux

How to use vi editor without going crazy

Start to use vi learning only the basic commands

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VPS

How to secure your VPS with Fail2ban

How to install and configure Fail2ban on Centos and Debian to protect your virtual private server

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SEO

Generate dynamic open graph images for blog posts

Learn how to generate social cards for Twitter, Facebook, Slack with the blog post title, using og-image service by Vercel. And how to integrate it in a gatsbyjs blog.

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NodeJs

Asymmetric encryption in Nodejs

How to generate public and private key, and how to encrypt e decrypt using this keys

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