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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 guideLinux Networking
25Scanning and Listing Available Wi-Fi Networks in Linux: nmcli, iw, and iwlist
Scan and list available Wi-Fi networks in Linux using nmcli, iw, and iwlist. Learn BSSID, SSID, RSSI signal strength, and channel parsing.
Field guideLinux
26Linux Command “Top”: Understanding and Using the System Monitoring Tool
Master the Linux top command: monitor real-time CPU usage, memory utilization (VIRT, RES, SHR), process states, load averages, and sort by PID.
Field guideSoftware Development
27Adb shell command to get Current Activity Name (Foreground / Top Activity )
Find active foreground Android app Activity names via ADB shell: run adb shell dumpsys activity dumpsys window | grep -E "mCurrentFocus|mFocusedApp".
Field guideSoftware Development
28Enums in C: Enumeration Syntax, Values, and State Machines
Define enumeration constants in C: assign integer values to enum, implement finite state machines, and compare enum vs #define constants.
Field guideSoftware Development
29Data Type Sizes in C (32-bit vs 64-bit ABI Reference)
Inspect C data type memory sizes across platforms: compare char, short, int, long, long long, and pointer sizes using sizeof operator on 32/64-bit ABIs.
Field guideSoftware Development
30Unions in C: Memory Sharing, Syntax, and Struct Differences
Master C unions: understand shared memory allocation, struct vs union memory layout, tagged unions, bit-field register packing, and type punning.
Field guideLinux
31Android Splash Screen Dimensions & SplashScreen API Setup
Configure splash screens in Android 12+: master SplashScreen API, icon dimensions (240x240 dp), windowSplashScreenAnimatedIcon, and theme XML.
Field guideLinux Kernel
32How to Fix dtc: Command Not Found Error in Linux
Fix dtc: command not found error in Linux: install device-tree-compiler on Ubuntu/Debian, compile Device Tree Source (.dts) to binary blob (.dtb).
Field guideLinux
33How to Use ADB Shell Commands on Android
Master ADB shell commands on Android: open interactive shell, execute pm list packages, inspect dumpsys services, capture logcat logs, and run shell scripts.
Field guideSoftware Development
34Array Initialization in C: Syntax, Memory, and Designated Initializers
Master array initialization in C: learn zero initialization, designated initializers [index] = val, multi-dimensional array memory strides, and memset.
Field guideSoftware Development
35String Initialization in C: Syntax, Memory, and Examples
Master string initialization in C: compare char arrays vs char* string literals, null terminators (\0), stack memory allocation, and read-only segments.
Field guideSoftware Development
36Python Core Concepts & Syntax Reference for Developers
Master Python core concepts: understand dynamic typing, indentation scoping, data structures (lists, dicts, sets), list comprehensions, and virtual environments.
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