From aaf69b1adc47dbfc221759432f6c9ca00440c93f Mon Sep 17 00:00:00 2001
From: DHARAKA METH <130528796+DHARAKA-METH@users.noreply.github.com>
Date: Thu, 14 Aug 2025 00:23:08 +0530
Subject: [PATCH] Fix content issue for DevOps learning path (Fixes #10)

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+# Linux Filesystem Structure
+
+---
+
+## 1 `/` – Root Directory
+**Purpose:** The root directory (`/`) is the top-level directory in the Linux filesystem, from which all other directories branch.  
+**Examples:** `/etc`, `/home`, `/usr`, `/var`
+
+---
+
+## 2 `/bin` – Essential Binaries
+**Purpose:** The `/bin` directory contains essential command-line binaries that are required for all users to operate the system.  
+**Examples:** `/bin/ls` (list files), `/bin/cp` (copy files), `/bin/mkdir` (create directories)
+
+---
+
+## 3 `/sbin` – System Binaries
+**Purpose:** The `/sbin` directory contains system administration binaries that are mainly used by the root user for maintenance and recovery tasks.  
+**Examples:** `/sbin/reboot`, `/sbin/fdisk`, `/sbin/ifconfig`
+
+---
+
+## 4 `/etc` – Configuration Files
+**Purpose:** The `/etc` directory stores system-wide configuration files for managing settings and services on the system.  
+**Examples:** `/etc/passwd` (user accounts), `/etc/hostname`, `/etc/ssh/sshd_config`
+
+---
+
+## 5 `/home` – User Home Directories
+**Purpose:** The `/home` directory stores personal files and settings for individual users, with each user having a separate subdirectory.  
+**Examples:** `/home/user/Documents/report.docx`, `/home/user2/.bashrc`
+
+---
+
+## 6 `/usr` – User Programs & Data
+**Purpose:** The `/usr` directory contains installed applications, libraries, and shared resources that are used by users.  
+**Examples:** `/usr/bin/python3` (Python), `/usr/lib/libc.so` (C library), `/usr/share/doc` (documentation)
+
+---
+
+## 7 `/var` – Variable Data
+**Purpose:** The `/var` directory stores files that frequently change during system operation, such as logs, mail, and scheduled jobs.  
+**Examples:** `/var/log/syslog` (logs), `/var/mail/user` (mail), `/var/spool/cron` (scheduled jobs)
+
+---
+
+## 8 `/tmp` – Temporary Files
+**Purpose:** The `/tmp` directory is used to store temporary files created by applications, which are usually cleared when the system reboots.  
+**Examples:** `/tmp/file1234.tmp`
+
+---
+
+## 9 `/dev` – Device Files
+**Purpose:** The `/dev` directory contains special files that represent hardware devices or virtual devices, allowing programs to communicate with them as if they were regular files.  
+**Examples:** `/dev/sda` (first hard disk), `/dev/tty1` (first terminal), `/dev/null` (discard data)
+
+---
+
+## 10 `/opt` – Optional Software
+**Purpose:** The `/opt` directory is used to store optional or third-party software packages that are not part of the core system.  
+**Examples:** `/opt/google/chrome`, `/opt/eclipse`
+
+---
+
+## 11 `/lib` – Essential Libraries
+**Purpose:** The `/lib` directory contains essential shared libraries that are required for binaries in `/bin` and `/sbin` to run.  
+**Examples:** `/lib/x86_64-linux-gnu/libc.so.6`, `/lib/modules/`
+
+---
+
+## 12 `/boot` – Boot Files
+**Purpose:** The `/boot` directory contains the kernel and bootloader files that are needed to start the operating system.  
+**Examples:** `/boot/vmlinuz-6.0` (kernel), `/boot/grub/grub.cfg` (GRUB config)
+
+---
+
+## 13 `/mnt` – Temporary Mount Points
+**Purpose:** The `/mnt` directory is used for temporarily mounting external devices such as USB drives or network shares.  
+**Example:** `/mnt/usb`
+
+---
+
+## 14 `/srv` – Service Data
+**Purpose:** The `/srv` directory stores data for services provided by the system, such as web or FTP servers.  
+**Example:** `/srv/www` for a web server
+
+---
+
+## 15 `/proc` – Process & Kernel Info
+**Purpose:** The `/proc` directory is a virtual filesystem that provides runtime information about processes and the kernel, which is useful for monitoring system state.  
+**Examples:** `/proc/cpuinfo` (CPU info), `/proc/meminfo` (memory info)
+
+---
+
+## 16 `/run` – Runtime Data
+**Purpose:** The `/run` directory stores temporary runtime data such as PIDs, sockets, and other information needed while the system is running.  
+**Examples:** `/run/sshd.pid`, `/run/user/1000`
+
+
+
+
+
+# Linux Filesystem Structure - ASCII Tree
+```
+/
+├── bin # essential binaries
+├── sbin # system binaries
+├── etc # configuration files
+├── home # user directories
+│ ├── user1
+│ └── user2
+├── usr # user programs, libraries, and shared resources
+│ ├── bin
+│ ├── lib
+│ └── share
+├── var # variable data
+│ ├── log
+│ ├── mail
+│ └── spool
+├── tmp # temporary files
+├── dev # device files
+├── opt # optional software
+├── lib # essential libraries for /bin and /sbin
+├── boot # boot files (kernel and bootloader)
+├── mnt # temporary mount points
+├── srv # service data
+├── proc # process and kernel info (virtual filesystem)
+└── run # runtime data (PIDs, sockets, etc.)
+
+```
+
+