This article explains the fundamental differences between user mode and kernel mode in Linux, why the separation matters for security and stability, how mode switches occur via system calls, interrupts, and traps, and provides practical code examples and performance‑optimizing techniques such as zero‑copy and asynchronous I/O.
This article explains the Linux /proc virtual filesystem, detailing its structure, dynamic file generation, key system and process files, and how to use it for real‑time monitoring, performance tuning, kernel parameter tweaking, and troubleshooting, complete with practical command examples and a sample monitoring script.
This article provides a comprehensive overview of the Linux /proc virtual filesystem, detailing how to mount it, the structure of its directories and files such as /proc/pid, /proc/self, and various system information files, and includes practical command examples and security considerations.
This article explains the Linux /proc virtual filesystem, the special role of /proc/self for accessing the current process's information, and provides practical commands to read cmdline, cwd, exe, environ, maps, and mem files for system monitoring and debugging.
The article provides a comprehensive guide to the Linux /proc virtual filesystem, explaining its purpose, how to mount it, and detailing the most important files and directories such as /proc/pid, /proc/self, security attributes, memory maps, and network information, along with practical commands for inspection.
This article explains the Linux /proc virtual filesystem, detailing its purpose as a kernel interface, how to mount it, and describing the most important files and directories—such as /proc/[pid], /proc/self, /proc/net, and security‑related entries—along with example commands for inspecting process information.
The article provides a comprehensive guide to Linux’s /proc virtual filesystem, detailing its purpose, mounting methods, key directories such as /proc/pid, /proc/self, and numerous files that expose process, thread, memory, and kernel information, along with practical command examples.
This guide explains how to inspect and control Linux processes using the ps and top commands, explores process creation, termination, signals, priority adjustment, the /proc filesystem, and job control techniques for background and foreground execution.
This guide outlines key Linux utilities for inspecting binaries during compilation (nm, strings, strip, readelf, objdump, addr2line) and for runtime debugging and profiling (gdb, ldd, strace, ltrace, time, gprof, valgrind, mtrace, oprofile), plus an overview of the proc filesystem and common system logs.
This article explains the core functions of the Linux kernel, covering system calls, file abstraction, process scheduling, module management, the /proc virtual filesystem, and practical command‑line tools such as lsmod, modprobe, modinfo, and sysctl, with clear code examples.
Using strace to trace the Linux ‘top’ command reveals that it reads a wealth of system information from the virtual /proc filesystem, where files like cpuinfo, meminfo, stat, and others provide real‑time metrics that power top’s monitoring display.
This guide explains how to use lsof and the /proc filesystem to locate open file descriptors of deleted logs or database files and restore their contents while the owning process remains active.
