Tutorials & Technical Guides
Next.js SEO: The Complete Implementation Guide to Boost Your Site Ranking
Learn to implement technical SEO for your Next.js website for SEO by optimizing meta tags, JSON-LD schema, sitemap, robots.txt, link tags, and script & image optimization.
Minh Vu
January 11, 2024
Next.js JSON-LD: How to Add Structured Data to Your Website
Learn how to generate JSON-LD Schema for your Next.js website to improve SEO and user experience.
Logstash: How to Remove Field using Mutate Filter
Learn how to remove a single field, multiple fields, and nested fields with or without conditions in Logstash using the mutate filter and the `remove_field` option.
Logstash Conditionals: Using if/else to Control Log Flow
Learn how to use conditionals in Logstash with if/else statements to control the flow of your logs.
Minh Vu
Software Engineer · M.Sc. student moving into low-level & systems
Hi 👋, I'm a software engineer with 3+ years of industry experience. Now I'm doing an M.Sc. in Passau and moving into low-level and systems work. This blog has practical tutorials, mostly on the Elastic Stack and Next.js. I won Third Prize at the ICPC Asia Hanoi Regional (ranked 32/126), and my LeetCode rating is 1756 (top 10.4%, Sep 2026). I'm looking for a working student job or a 2027 internship. Feel free to get in touch.
New Posts
Next.js JSON-LD: How to Add Structured Data to Your Website
Learn how to generate JSON-LD Schema for your Next.js website to improve SEO and user experience.
Logstash Prune Filter: Powerful Filter to Remove Fields
Learn to use the prune filter in Logstash to remove all fields, remove specific fields, and keep specific fields dynamically and flexibly based on patterns.
Deploy Your Next.js App on DigitalOcean: A Step-by-Step Guide
Learn how to easily deploy your Next.js application on a DigitalOcean Droplet. This guide covers Droplet setup, configuration, and app deployment for a smooth launch.
Logstash Conditionals: Using if/else to Control Log Flow
Learn how to use conditionals in Logstash with if/else statements to control the flow of your logs.
Logstash: How to Parse JSON Logs
Learn how to use Logstash to parse JSON logs from file or a string field in an event.
Next.js SEO: The Complete Implementation Guide to Boost Your Site Ranking
Learn to implement technical SEO for your Next.js website for SEO by optimizing meta tags, JSON-LD schema, sitemap, robots.txt, link tags, and script & image optimization.
Next.js
Next.js SEO: The Complete Implementation Guide to Boost Your Site Ranking
Learn to implement technical SEO for your Next.js website for SEO by optimizing meta tags, JSON-LD schema, sitemap, robots.txt, link tags, and script & image optimization.
Next.js JSON-LD: How to Add Structured Data to Your Website
Learn how to generate JSON-LD Schema for your Next.js website to improve SEO and user experience.
Deploy Your Next.js App on DigitalOcean: A Step-by-Step Guide
Learn how to easily deploy your Next.js application on a DigitalOcean Droplet. This guide covers Droplet setup, configuration, and app deployment for a smooth launch.
Elasticsearch
Partial Update in Elasticsearch Guide (with Examples)
Learn how to perform partial updates in Elasticsearch 8.x to update only specific fields in a document using the Update API.
Elasticsearch: How to Set Default Value for Missing Fields
Learn how to set default values for null or missing fields in Elasticsearch using the `null_value` parameter and ingest pipeline.
Painless Script: How to Check for Null Values
Learn how to check for null values in Painless script in Elasticsearch.
Elasticsearch Find Similar Documents Tutorial (with Examples)
Learn how to find similar documents to a given document in Elasticsearch using the more_like_this query.
Logstash
Logstash: How to Remove Field using Mutate Filter
Learn how to remove a single field, multiple fields, and nested fields with or without conditions in Logstash using the mutate filter and the `remove_field` option.
Logstash Conditionals: Using if/else to Control Log Flow
Learn how to use conditionals in Logstash with if/else statements to control the flow of your logs.
Logstash: Add Field to Event with Mutate Filter
Learn how to add field in Logstash using the mutate filter with the add_field option. Also, see how to combine fields to a new field and add field based on condition.
Logstash Conditional Filter: The Ultimate Guide
Learn how to use conditionals in Logstash filter to process data based on different conditions.
Logstash Mutate Filter: Everything You Need to Know
Learn how to use the Logstash mutate filter to manipulate fields in your data.
How to Install Logstash on Ubuntu & Other Linux Distributions
Learn how to install Logstash on Ubuntu & other Linux distributions. Logstash is a part of the Elastic Stack to ingest data from multiple sources, then process, transform, and enrich it.
Security
Top Posts
Next.js SEO: The Complete Implementation Guide to Boost Your Site Ranking
Learn to implement technical SEO for your Next.js website for SEO by optimizing meta tags, JSON-LD schema, sitemap, robots.txt, link tags, and script & image optimization.
Next.js JSON-LD: How to Add Structured Data to Your Website
Learn how to generate JSON-LD Schema for your Next.js website to improve SEO and user experience.
Logstash: How to Remove Field using Mutate Filter
Learn how to remove a single field, multiple fields, and nested fields with or without conditions in Logstash using the mutate filter and the `remove_field` option.
Logstash Conditionals: Using if/else to Control Log Flow
Learn how to use conditionals in Logstash with if/else statements to control the flow of your logs.
Logstash: Add Field to Event with Mutate Filter
Learn how to add field in Logstash using the mutate filter with the add_field option. Also, see how to combine fields to a new field and add field based on condition.
Logstash Conditional Filter: The Ultimate Guide
Learn how to use conditionals in Logstash filter to process data based on different conditions.
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