Better Dev Link

We used it daily, bash or zsh. when we type any command then TAB. But how does bash awares of that? Turn out bash use a built in complete for that. Command registers with bash using complete -W

possible causes of replication lag, such as single-threaded replication, choice of binlog format, and disk flushing policy. I’ll show you how to diagnose the problem in your MySQL setup. Finally, I’ll describe how we fixed the replication lag in our case.

Every developer has to deal with legacy code at some point. We always want to migrate off some legacy system. trade-off decision in the past. short cut we made in order to be able to move forward Now how we fix them? This is how Shopify do it at scale.

Expert says “Don’t roll your own” when it comes to crypto. But without trying to build thing, and learn how it works, how can we deeply understand anything. So here, we go, for fun and see how it works

Virtual, DOM. all sounds scary. This article shows us how to do that in less trhan 50 lines of code.

Schema migrations at scale are hard and usually resvolve multiple steps to guarantee zero downtime. We can learn from big company like Github.

When working with databases, most of the time, all you need is SELECT, UPDATE (CRUD operations), few JOINs and WHERE clauses and that’s about it. But, sometimes you will run into datasets and tasks, that will require you to use much more advanced features of SQL. One of them is CTE or common table expression and more specifically, Recursive CTE, which we can use to make recursive SQL queries.

A collection of courses and learning resources aims to improve your technical documentation from Google.

Public-key infrastructure (PKI) is a term for everything that has to do with web encryption beyond. This is a list of main terms to understand what it is and how it works.

This is an overview of a design we’ve put into production to facilitate enterprise level VPN connectivity without traditional drawbacks like scale limit, hairpinning traffic and expensive hardware and software licensing. ZeroTier is a full mesh VPN where all clients can reach each other, make it super easy to collaborate such as you can SSH into your friend laptop to share a tmux session.

Basically a cheatsheet of tools like awk, sed, grep, tr, cut, paste, sort, uniq etc to process text such as csv, log file in the shell.