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    • Linux & Systems

    System configuration, common locations, and command-line recipes.

    Bash & Shell Scripting

    Complete reference for Bash scripting: syntax, variables, control flow, functions, debugging, and common patterns.

    Files, Archives & File Editors

    Comprehensive reference for Linux file operations: CRUD, searching, archiving with tar, file viewer tools, sed/awk text processing, and Vim editor commands.

    Users, Groups & Permissions

    Reference for Linux user and group management, file permissions, ACLs, sudo configuration, and security frameworks like AppArmor.

    Process Management

    Reference for Linux process management: listing, monitoring, signaling, priorities, systemd service management, and resource analysis tools.

    SSH & Remote Access

    Complete reference for SSH: key generation, client configuration, tunneling, agent forwarding, rsync, and common connection patterns.

    Linux Networking

    Reference for Linux networking: interface configuration, routing, DNS, firewalls (UFW & iptables), diagnostics, and kernel-level network tuning.

    Package Managers

    Complete reference for Linux package management: dpkg, APT, nala, package file locations, repository management, and common operations.

    Cron Jobs & Scheduled Tasks

    Complete reference for scheduling and managing recurring tasks with cron, systemd timers, and at jobs on Linux.

    Logging & Log Management

    Reference for Linux logging: journald, syslog, logrotate, common log locations, and log analysis commands.

    Block Storage & Disk Management

    Reference for Linux block storage: partitioning, formatting, mounting, LVM, filesystem operations, and disk debugging.

    Device Management

    Reference for Linux device management: listing devices, inspecting hardware, managing drivers, debugging device issues, and understanding /dev, /sys, and /proc.

    Linux Kernel

    Reference for working with the Linux kernel: module management, boot parameters, sysctl tuning, GRUB configuration, and kernel debugging.

    Common Linux Configuration Locations

    Reference for common configuration files and directories across Linux distributions.

    Find the Process Listening on a Port

    Identify which process is bound to a specific TCP or UDP port on Linux.

    Makefile Reference

    Complete Makefile reference: syntax, variables, automatic variables, pattern rules, conditionals, functions, and practical patterns for Docker, Kubernetes, Terraform, and general development workflows.