@sachintech

Uk K

@sachintechDelhi, IndiaJoined August 2026

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Tech & Linux Hubtech-learning-sachin.hashnode.dev50 posts

Diagnose Linux DNS Failures With getent, resolvectl and dig

A Linux system can have a working network connection and still fail to reach a website by name. An application may report that a host cannot be resolved, a package manager may fail to contact a reposi

10 min readtech-learning-sachin.hashnode.dev

1Nov 5

Learn Linux Troubleshooting Through a Practical, Step-by-Step Diagnostic Workflow

Linux troubleshooting is an important skill for students, system administrators, developers and anyone who works with servers. A Linux system can run applications, manage files, process network reques

14 min readtech-learning-sachin.hashnode.dev

Nov 4

Linux Disk Space and Inodes: Diagnose a Full Server Without Deleting the Wrong Files

A Linux server can stop working correctly when storage becomes full. Websites may fail to upload images, databases may refuse new writes and applications may be unable to create temporary files. A sys

9 min readtech-learning-sachin.hashnode.dev

Nov 3

Deep Dive into Linux Kernel Performance Tuning: Optimizing System Limits with Sysctl and Perf

The Linux kernel acts as the core intermediary between physical hardware components and user-space software applications. While standard Linux distributions provide balanced default configurations sui

4 min readtech-learning-sachin.hashnode.dev

Nov 2

Use systemd Timers for Reliable Scheduled Tasks on Linux

Introduction Scheduled work is a normal part of Linux administration. Systems rotate logs, refresh data, run backups, clean temporary files, and perform health checks at regular intervals. Cron remain

11 min readtech-learning-sachin.hashnode.dev

Oct 30

Uk K

About

Available for

Uk K's blogs

Diagnose Linux DNS Failures With getent, resolvectl and dig

Learn Linux Troubleshooting Through a Practical, Step-by-Step Diagnostic Workflow

Linux Disk Space and Inodes: Diagnose a Full Server Without Deleting the Wrong Files

Deep Dive into Linux Kernel Performance Tuning: Optimizing System Limits with Sysctl and Perf

Use systemd Timers for Reliable Scheduled Tasks on Linux

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Uk K

About

Available for

Uk K's blogs

Diagnose Linux DNS Failures With getent, resolvectl and dig

Learn Linux Troubleshooting Through a Practical, Step-by-Step Diagnostic Workflow

Linux Disk Space and Inodes: Diagnose a Full Server Without Deleting the Wrong Files

Deep Dive into Linux Kernel Performance Tuning: Optimizing System Limits with Sysctl and Perf

Use systemd Timers for Reliable Scheduled Tasks on Linux