Posts · 2021 – 2025
Posts
Guides and posts about DevOps, SysOps, Linux, Kubernetes, security practices and CTF write-ups.
Showing 12 of 12
2025
2 posts
Deprecated HorizontalPodAutoscaler API in Helm Charts for Kubernetes 1.26+
On Kubernetes 1.26+ you might hit “no matches for kind HorizontalPodAutoscaler in version autoscaling/v2beta2”. This fixes the API version in your Helm release secrets automatically.
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Fast Way To Analyze Filesystems And Calculate Directory Sizes With ncdu
ncdu, the lightning-quick command-line tool that turns storage analysis into a simple, interactive experience.
Read the post2024
2 posts
Handling Zalo OA API Via Python Script
A simple API script for the Zalo Official Account — manage users, get user info, send and receive messages.
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Mount S3 Storage Compatibility As Local Filesystem
Object storage is scalable and cheap — mount S3-compatible storage as a local filesystem for apps that expect one.
Read the post2022
1 post
2021
7 posts
Create And Manage RAID Array On Ubuntu 20.04
How to create and manage a RAID array on a Linux system — done on Ubuntu 20.04.
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DownUnderCTF 2021
A worldwide CTF aimed at Australian and New Zealand secondary and tertiary students.
Read the postcorCTF 2021
The first CTF by the Crusaders of Rust, an American and European collegiate team.
Read the postRCTS CERT 2021 — Defending the SOC
24 hours, 30 challenges — the first stage of CTF Internacional MetaRed 2021.
Read the postBSides Noida CTF 2021
Part of BSides Noida 2021 Virtual Edition.
Read the postRTLxHA CTF 21
July 31 – August 2, 2021, with my 54010N team.
Read the postImaginary CTF 2021
An all-new CTF, all skill levels welcome — July 23 to 27, 4 PM UTC.
Read the postNewer posts live on the blog.
Argo CD, DNS as code, macOS setup and more on blog.nh4ttruong.me.