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$ ip route show
default via 192.168.1.1 dev eth0 192.168.1.0/24 dev eth0 proto kernel 10.0.0.0/24 via 192.168.1.20 dev eth0
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ADB CommandsOpen technology index
65 entries02AndroidOpen technology index
37 entries03Linux, OS Concepts and NetworkingOpen technology index
36 entries04Commands and PackagesOpen technology index
30 entries05Linux Host, Ubuntu, SysAdminOpen technology index
28 entries06Operating System ConceptsOpen technology index
26 entriesRecently updated
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Fastboot Says “No Permissions”? Diagnose USB Before Editing udevADB Commands
Existing libraryA fastboot permission error is fixable, but only after you know Linux can see the bootloader. This diagnostic path separates USB, mode, tool, group, and udev-rule failures without normalizing sudo fastboot.
Who Is Really Logged In to This Linux Machine?Basic Linux Commands
Existing libraryThe who command can settle a tense “is anyone still using this server?” moment—provided you understand what its session records can and cannot prove.
Let the Linux tree Command Explain a DirectoryLinux Commands
Existing libraryTurn an unfamiliar directory into a readable map with tested tree commands for depth, filtering, metadata, symlinks, and machine-readable output.
Find the Right Files on Linux Without Fear of the ResultLinux
Existing libraryBuild predictable Linux find expressions for names, types, sizes, and file contents, then inspect every match safely before taking action.
Safely Rename Parts of Filenames and File ContentLinux
Existing libraryRenaming `memory_map.c` to `memory_mapping.c` and changing identifiers inside source files are separate operations. This guide previews both, handles unusual filenames, refuses collisions, keeps backups, and makes rollback practical.
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Field guideDjango & REST Api
13Django REST Framework Routers, Without the Magic
A Django REST Framework router is a URL-pattern generator for ViewSets—not the browsable API itself. Build a small API, inspect every generated route, understand basename and action naming, and know when explicit paths are the clearer choice.
Field guideOperating System Concepts
14Protect Shared State with pthread_mutex_lock
A POSIX mutex does not make a variable magically private; it gives cooperating threads one serialized critical section and establishes synchronization around protected state. Build a checked C example, understand why the unlocked version is undefined, find races with ThreadSanitizer, and choose between mutexes and atomics.
Field guideDjango & REST Api
15Add a Django Model to the Admin—Properly
Registering a Django model takes one line; making its admin safe and pleasant takes a little design. Build a useful change list, searchable forms, related-object inlines, permission boundaries, and tests without turning the admin into an accidental public application.
Field guideDjango & REST Api
16Create and Secure a Django Admin Account
Create a Django administrator without leaking credentials or weakening password validation. Then verify the account, recover access safely, understand staff versus superuser privileges, and troubleshoot the admin login in development and production.
Field guideDjango & REST Api
17Protect the DRF API Root with Login and Permissions
Adding a Login link to Django REST Framework’s browsable API does not protect an endpoint. This walkthrough combines session authentication with an explicit permission policy, verifies anonymous and logged-in behavior, and closes the production security gaps beginners often miss.
Field guideDjango & REST Api
18Design Your First Django Model and Migration
A Django model is more than a Python-shaped table definition: it establishes database constraints, application validation, relationships, query paths, and migration history. This example builds a small publishing model and verifies each layer.
Field guideMultimedia
19Shuffle Music from the Ubuntu Command Line
For a trusted local music folder, mpv can recurse and shuffle it directly. This article also preserves the MPlayer workflow, fixes fragile filename handling, shows reusable playlists, and explains playback controls and audio troubleshooting.
Field guideApplication Programming Interface ( API )
20Fetch Daily Mandi Prices from the data.gov.in API
Use the official data.gov.in resource API to retrieve daily Agmarknet mandi prices by state, market, commodity, variety, and grade—without mistaking daily reports for a live market feed.
Field guideApplication Programming Interface ( API )
21Get a data.gov.in API Key and Make Your First Request
A current, practical walkthrough for registering on data.gov.in, generating an API key, finding a usable resource ID, and testing the first request safely.
Field guideAndroid Build System
22Building Android AAR Libraries and Linking Module API Methods
Learn how to create an Android AAR library module in Gradle, define public API interfaces, link local module dependencies, and invoke library functions.
Field guideLinux Networking
23Sending HTTP POST Data from a Client and Returning Server Responses via Netcat
Send HTTP POST data from client tools (curl, Python) and return custom JSON responses using Netcat over a specific port on Linux.
Field guideLinux Networking
24Listening on Specific Port Numbers with Netcat to Receive HTTP POST Requests
Listen on a specific port using Netcat (nc) to inspect incoming HTTP POST messages, webhooks, JSON payloads, and log headers in Linux.
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