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Linux /proc filesystem

The Linux /proc filesystem is a virtual interface that exposes live system information and kernel parameters, enabling users to monitor hardware and processes and adjust kernel settings at runtime

Here are a list of useful /proc entries 😎👆 #software #softwaredeveloper #computer

Find high-res pdf books with all my #linux related #infographic at https://study-notes.org

2025/7/15 Edited to

The Linux /proc filesystem is a pseudo-filesystem that provides a dynamic view into the kernel and running system's internal data structures. It allows users and administrators to monitor system performance, diagnose issues, and even modify kernel parameters during runtime. Key entries within /proc include: - /proc/cpuinfo: Contains detailed information about the CPU, such as model name, number of cores, and clock speed. This is useful for understanding the processor capabilities. - /proc/meminfo: Provides statistics about system memory usage, including total memory, free memory, available buffers, and cached memory. Essential for monitoring RAM consumption. - /proc/stat: Contains aggregated CPU statistics, interrupts, and context switches providing insight into system activity levels. - /proc/uptime: Displays the total uptime since the last boot and the idle time. - /proc/loadavg: Shows the system load averages over 1, 5, and 15 minutes, helping assess overall system load. - /proc/version: Details about the kernel version and build information. - /proc/cmdline: Displays the kernel parameters passed at boot time. - /proc/mounts: Lists all currently mounted file systems with their types and mount points. - /proc/swaps: Information about active swap spaces including size and usage. - /proc/diskstats: I/O statistics for each disk, including number of reads and writes. - /proc/interrupts: Tracks interrupts received by each CPU, useful for hardware monitoring. - /proc/filesystems: Lists filesystem types supported by the kernel. - /proc/net/dev: Network interface statistics such as received/transmitted packets and errors. - /proc/net/tcp: Lists active TCP connections with addresses and ports, valuable for network diagnostics. - /proc/net/route: Displays the IPv4 routing table. - /proc/net/sockstat: Socket statistics including allocations and orphaned sockets. Additionally, per-process directories like /proc/[PID]/ provide detailed information about individual processes, including status, open file descriptors, I/O statistics, and network connections. Using these virtual entries, system administrators and developers can gain deep insight into system health and behavior without requiring additional tools, making /proc an indispensable component for Linux system management and debugging. For further study, comprehensive infographics and detailed PDF resources are available at study-notes.org to help master the Linux /proc filesystem.

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An infographic titled 'Linux /proc Filesystem' by Dan Nanni, listing various /proc entries and their functions. It details how to access real-time system information, including CPU, memory, network, disk I/O, kernel, and process-specific data, presented with folder icons on a dark background.

Linux /proc filesystem

The /proc filesystem in Linux is a virtual gateway to real-time system info, from hardware stats to kernel parameters, letting you monitor and tweak your system on the fly Here are some of the most useful /proc entries 😎👆 #TechTips #software #softwaredeveloper Find high-res pdf books

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Here is a concise reference of Linux shell operators for redirecting, appending, and combining standard input, output, and error streams 😎👇 Find high-res pdf ebooks with all my Linux related infographics at https://study-notes.org #linux #sysadmin #infosec #devops #softwareengine

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Useful TUI software on Linux

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An infographic titled 'Linux Filesystem Commands' lists common and filesystem-specific commands for EXT, ZFS, Btrfs, and XFS. Each command, like mkfs, df, e2fsck, zpool, btrfs, and xfs_repair, is accompanied by a brief description of its function, created by Dan Nanni.

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So you want to “learn Linux”?

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Linux commands for hardware information

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Most popular Linux-related GitHub projects

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Linux /etc/shadow file overview

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A ranked list of the top 20 Linux-related GitHub projects, including their repository names, star counts, fork counts, and brief descriptions. Projects range from the Linux kernel to command-line tools, editors, and system monitors. The infographic is credited to Dan Nanni and study-notes.org.

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This infographic illustrates different types of ping methods, including ICMP, TCP, UDP, ARP, and HTTP. For each type, it shows the request and reply protocols, along with common Linux tools used for each ping method, such as ping, tcping, nping, arping, and httping.

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The image illustrates how Linux cgroups manage resources like CPU, Memory, Storage I/O, and Network. It shows creating cgroups, attaching a process (PID 12345) to `cgroup3` via `/sys/fs/cgroup/cgroup3/cgroup.procs`, and defining its resource limits (e.g., 512M memory.max, 10M/5M disk I/O).

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This image displays a list of useful Linux shell aliases and functions created by Dan Nanni. It provides shortcuts for common command-line tasks like directory navigation, file management, system monitoring, process handling, network utilities, and system updates, aiming to boost productivity.

Useful Linux shell aliases and functions

Linux tip: Shell aliases or functions let you turn long or complex commands into short, memorable shortcuts — making your command-line workflow faster and cleaner Here are useful aliases and shell functions you can add to your shell configuration 😎👆 #devops #linux #productivityhacks #so

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An infographic titled 'Privacy-Focused Linux Distros' lists nine operating systems: Debian, Fedora, Kicksecure, Linux Kodachi, MOFO Linux, Parrot OS, Qubes OS, Tails OS, and Whonix, each with a brief description of its privacy and security features. It also credits Dan Nanni.

Privacy-focused Linux distributions

Privacy focused Linux distros minimize data collection and metadata leakage by default while prioritizing anonymity, isolation, and user control over networking, software behavior, and system telemetry. Here are some of the most popular Linux distros for privacy-conscious users 😎👆 Find high-r

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Linux user management commands

Even on a single-user Linux system, having multiple user accounts is important for separating administrative tasks, securely running background services, and safely experimenting without affecting your main environment Here are essential Linux commands for user management 😎👆 #devops #softwar

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Linux netcat command examples

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Linux terminal shortcuts

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An infographic explaining Linux special file permissions: SUID, SGID, and the Sticky bit. It illustrates their positions in permission strings (rwsrwsrwt), defines their functions, and provides examples like /bin/passwd for SUID, /usr/bin/crontab for SGID, and /tmp for the Sticky bit. Created by Dan Nanni.

Special file permissions on Linux

Linux uses special permissions like SUID, SGID, and the Sticky Bit for advanced access control. SUID and SGID change how execution rights are applied, while the Sticky Bit controls who can delete files in shared directories Learn about these special permissions in more details 😎👆 #technology

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An infographic comparing hard and soft links on Linux filesystems. Hard links are references to the same inode within the same filesystem, while soft links are special files storing pathnames that can cross filesystem boundaries and become dangling if the target is removed. Visuals illustrate their respective connections to inodes.

Hard link vs. soft link on Linux filesystem

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An infographic titled 'Android Filesystem Structure' created by Dan Nanni, detailing the hierarchical organization of Android directories like /boot, /cache, /data, /system, and their specific functions for OS operation and user data.

Android file system hierarchy

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