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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
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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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Clear filtersField guideCore Kernel
13Avoid a process from being killed in case of Out of Memory
In our previous post, we understood “What is Out of Memory Killer ?” In this post, we … Read more
Field guideLinux Host, Ubuntu, SysAdmin
14Avoid zombie process in Linux
Zombie process is the process which dies/finishes immediately and whose parent didn’t cares to handle the status … Read more
Field guideLinux, OS Concepts and Networking
15Create process in Linux using fork system call
Below is simple process creation program using fork system call, fork return child’s process Id in main/parent … Read more
Field guideC Programs
16Send and Receive (Transfer) integer over socket using C program
Following the simple example which shows how we can send and receive an integer over a socket. … Read more
Field guideLinux, OS Concepts and Networking
17C program to check total and free RAM memory in Linux
Following C program helps you to identify what is the total and free memory / RAM available … Read more
Field guideC Programs
18Example for using shared data between two Unix threads
Following is the simple example to show, how we can create two threads at a time and … Read more
Field guideApplication Libraries
19Creating a simple thread in Linux using pthread library api’s
In this post, we create a simple thread using pthread library API “pthread_create” and wait for this … Read more
Field guideLinux, OS Concepts and Networking
20Understanding Linux page cache memory
If data is written, it is first written to the Page Cache and managed as one of … Read more
Field guideC Programs
21Sending ARP request and receiving ARP Reply using C code
This post is in continuation of our previous post “Understanding ARP (Address Resolution Protocol) basics“ To visualise … Read more
Field guideC Programs
22Understanding Linux Signals with simple C program
Signals are a limited form of inter-process communication (IPC), typically used in Unix, Unix-like, and other POSIX-compliant … Read more
Field guideC Programs
23Identify / Test file types in Linux using C program stat API
The file mode, stored in the st_mode field of the file attributes, contains two kinds of information: … Read more
Field guideApplication Libraries
24C program to verify the integrity of a file with md5 checksum
Most of the times we downloaded some files from the internet, and we also see people provides … Read more
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