--- title: "#system-calls articles | Hashnode" description: "Explore 17 articles tagged #system-calls on Hashnode. Tutorials, guides, and how-tos from the community." url: "https://hashnode.com/tag/system-calls" --- Tag # #system-calls 17 posts · 0 followers [Mayank Mahajan](https://hashnode.com/@Mayank9056) · [Oct 28](https://hashnode.com/posts/what-really-happens-when-you-run-npm-run-dev-user-space-vs-kernel-space-explained/6ae1a46b98984ed606db98ff) ### [What Really Happens When You Run npm run dev? User Space vs Kernel Space Explained](https://mayankdev.hashnode.dev/what-really-happens-when-you-run-npm-run-dev-user-space-vs-kernel-space-explained?utm_source=hashnode&utm_medium=feed) System calls, kernel types, and IPC explained simply, from your VS Code terminal down to the hardware. 11 min read · [mayankdev.hashnode.dev](https://mayankdev.hashnode.dev/what-really-happens-when-you-run-npm-run-dev-user-space-vs-kernel-space-explained?utm_source=hashnode&utm_medium=feed) [Paul Adeoye](https://hashnode.com/@PaulKing) · [Oct 1](https://hashnode.com/posts/processes-system-calls-and-the-linux-kernel/6abe8cdb5d09c14d09530cb1) ### [Processes, System Calls and the Linux Kernel:](https://paulking.hashnode.dev/processes-system-calls-and-the-linux-kernel?utm_source=hashnode&utm_medium=feed) What Happens When an Application Runs 9 min read · [paulking.hashnode.dev](https://paulking.hashnode.dev/processes-system-calls-and-the-linux-kernel?utm_source=hashnode&utm_medium=feed) [Sagun](https://hashnode.com/@sagun-labs) · [Sep 1](https://hashnode.com/posts/windows-apis-and-system-calls-how-applications-reach-the-operating-system/6a962f7ebdeccf879c4e8d6f) ### [Windows APIs and System Calls: How Applications Reach the Operating System](https://sagunwrites.hashnode.dev/windows-apis-and-system-calls-how-applications-reach-the-operating-system?utm_source=hashnode&utm_medium=feed) Learn how Windows APIs and system calls connect applications to the kernel, including Win32, NT API, ntdll.dll, and user/kernel mode. 7 min read · [sagunwrites.hashnode.dev](https://sagunwrites.hashnode.dev/windows-apis-and-system-calls-how-applications-reach-the-operating-system?utm_source=hashnode&utm_medium=feed) [Sagun](https://hashnode.com/@sagun-labs) · [Sep 1](https://hashnode.com/posts/user-mode-vs-kernel-mode-in-windows/6a962952d7fd83ae9ab5e151) ### [User Mode vs Kernel Mode in Windows](https://sagunwrites.hashnode.dev/user-mode-vs-kernel-mode-in-windows?utm_source=hashnode&utm_medium=feed) Learn the difference between Windows user mode and kernel mode, including privileges, system calls, security, and kernel components. 6 min read · [sagunwrites.hashnode.dev](https://sagunwrites.hashnode.dev/user-mode-vs-kernel-mode-in-windows?utm_source=hashnode&utm_medium=feed) [Sagun](https://hashnode.com/@sagun-labs) · [Aug 24](https://hashnode.com/posts/what-is-the-fork-system-call/6a8c11065f6dd084fb6efa93) ### [What Is the fork() System Call?](https://sagunwrites.hashnode.dev/what-is-the-fork-system-call?utm_source=hashnode&utm_medium=feed) Learn how the Unix and Linux fork() system call creates child processes, how parent and child processes work, and how Copy-on-Write helps. 4 min read · [sagunwrites.hashnode.dev](https://sagunwrites.hashnode.dev/what-is-the-fork-system-call?utm_source=hashnode&utm_medium=feed) [Sagun](https://hashnode.com/@sagun-labs) · [Aug 24](https://hashnode.com/posts/user-mode-vs-kernel-mode-in-operating-systems/6a8c11689dbee0e9ad2f211a) ### [User Mode vs Kernel Mode in Operating Systems](https://sagunwrites.hashnode.dev/user-mode-vs-kernel-mode-in-operating-systems?utm_source=hashnode&utm_medium=feed) Learn the difference between user mode and kernel mode, why privilege levels exist, and how applications safely interact with the operating system. 5 min read · [sagunwrites.hashnode.dev](https://sagunwrites.hashnode.dev/user-mode-vs-kernel-mode-in-operating-systems?utm_source=hashnode&utm_medium=feed) [Sagun](https://hashnode.com/@sagun-labs) · [Aug 24](https://hashnode.com/posts/what-are-system-calls/6a8c10a370d2cc82b6dd12ec) ### [What Are System Calls?](https://sagunwrites.hashnode.dev/what-are-system-calls?utm_source=hashnode&utm_medium=feed) Learn what system calls are, why applications need them, how they interact with the kernel, and the major types of system calls. 4 min read · [sagunwrites.hashnode.dev](https://sagunwrites.hashnode.dev/what-are-system-calls?utm_source=hashnode&utm_medium=feed) [Dr Hernani Costa](https://hashnode.com/@drhernanicosta) · [Jun 21](https://hashnode.com/posts/how-the-sentry-intercepts-system-calls-to-contain-untrusted-agent-code/6a378954016167f19aab86c1) ### [How the Sentry Intercepts System Calls to Contain Untrusted Agent Code](https://radar.firstaimovers.com/how-the-sentry-intercepts-system-calls-to-contain-untrusted-agent-code?utm_source=hashnode&utm_medium=feed) The Sentry in gVisor mediates every system call from untrusted code, reducing the host attack surface. Learn how interception works and why it matters for 8 min read · [radar.firstaimovers.com](https://radar.firstaimovers.com/how-the-sentry-intercepts-system-calls-to-contain-untrusted-agent-code?utm_source=hashnode&utm_medium=feed) [Darsh Patel](https://hashnode.com/@pateldarsh) · [Jun 20](https://hashnode.com/posts/function-calls-vs-system-calls-without-the-headache/6a36bd9d41dc9094746fcd20) ### [Function Calls vs. System Calls (Without the Headache)](https://darsh-patel.hashnode.dev/function-calls-vs-system-calls-without-the-headache?utm_source=hashnode&utm_medium=feed) Lets crack your OS Interview 5 min read · [darsh-patel.hashnode.dev](https://darsh-patel.hashnode.dev/function-calls-vs-system-calls-without-the-headache?utm_source=hashnode&utm_medium=feed) [Shivraj S. Taware](https://hashnode.com/@shivarajtaware) · [Oct 29, 2025](https://hashnode.com/posts/unit-5-understanding-system-calls-the-bridge-between-user-applications-and-the-kernel/6901a39d0eec07cc91a7e3e4) ### [Unit 5: Understanding System Calls: The Bridge Between User Applications and the Kernel](https://shivarajtaware.hashnode.dev/unit-5-understanding-system-calls-the-bridge-between-user-applications-and-the-kernel?utm_source=hashnode&utm_medium=feed) Introduction Have you ever wondered how your computer’s applications like a browser, text editor, or music player talk to the operating system (OS) to get their work done? When you create a folder, save a file, or open a photo, your application doesn... 6 min read · [shivarajtaware.hashnode.dev](https://shivarajtaware.hashnode.dev/unit-5-understanding-system-calls-the-bridge-between-user-applications-and-the-kernel?utm_source=hashnode&utm_medium=feed)