Linux Server Cookbook (Gonzalez, Alberto) (z-library.sk, 1lib.sk, z-lib.sk)

# Linux Server Cookbook — Reading Guide ## 【One-Line Pitch】 A practical, hands-on reference for Linux administrators who want to master server management from installation through advanced networking, security, and DevOps practices — ideal for sysadmins preparing for certification or managing real-world Linux deployments. ## 【Book Arc】 - **Opening (~0%–10%)**: Introduces the DevOps landscape and why Linux dominates enterprise servers, then walks through Debian installation step-by-step — from boot menu and language selection through GRUB boot loader setup. - **Early (~10%–23%)**: Covers command-line fundamentals — user/group administration, hardware inspection (lscpu, lshw, free), data streams (echo, read, tee), and package management with both DEB (dpkg/apt) and RPM (rpm/dnf) ecosystems. - **Early (~23%–32%)**: Explains file permissions in depth — umask defaults, special permissions (setuid/setgid/sticky bit), shell special characters, and transitions into system resource monitoring with CPU, memory, and disk tools. - **Middle (~32%–48%)**: Moves into monitoring and networking — interpreting /proc/meminfo, LVM commands (pvdisplay, lvdisplay), network configuration across Red Hat (NetworkManager) and Ubuntu (Netplan) systems, plus advanced topics like bonding, bridges, and VLANs. - **Middle (~48%–60%)**: Covers security hardening — firewall management (Firewalld vs. ufw, nftables backend), AppArmor profiles, and network services including DHCP, DNS, and SSH with public/private key authentication. - **Late (~60%–100%)**: Expands into file sharing (NFS, Samba, FTP, TFTP), CI/CD practices with container platforms (Docker, Kubernetes), backup solutions (Bacula, ReaR), and multi-cloud management with Terraform and OpenStack. ## 【Key Takeaways】 - **DevOps stages map to specific toolchains** (Early): CI/CD, configuration management (Ansible, Puppet), and monitoring (Prometheus, Grafana) form the modern Linux server workflow — understanding this ecosystem helps you position where each tool fits. - **Hardware inspection commands reveal system capabilities** (Early): lscpu shows CPU topology, lshw lists all hardware with HTML/XML/JSON output options, and free displays memory with human-readable flags — essential first steps for capacity planning. - **Package management differs fundamentally between DEB and RPM systems** (Early): dpkg operates on local .deb files with options like -L (list files) and -S (search), while rpm/dnf handle Red Hat packages — knowing both ecosystems is critical for multi-distribution environments. - **File permissions extend beyond rwx with special bits** (Early): setuid (4) runs executables as the owner, setgid (2) affects group inheritance on directories, and sticky bit (1) restricts deletion — umask defaults (typically 002) determine new file permissions (664/775). - **Resource monitoring requires understanding kernel interfaces** (Middle): /proc/meminfo provides raw memory data, CPU load averages span 1/5/15-minute intervals, and LVM commands (pvdisplay, lvdisplay) track logical volumes — these low-level tools predict issues before they cause downtime. - **Network configuration is distribution-specific** (Middle): Red Hat derivatives use NetworkManager, Ubuntu relies on Netplan with YAML files, and advanced setups require bonding (LACP for high availability), bridges (for VMs), and VLANs — modern firewalls use nftables as the backend replacing iptables. - **Security is layered across services and system** (Middle): Firewalld/ufw provide front-end management, AppArmor enforces application profiles (complain vs. enforce modes), and SSH can disable root login or require key-based authentication — defense-in-depth is the operating principle. - **Backup and cloud management are enterprise essentials** (Late): Bacula and ReaR offer open-source backup/restore, while Terraform enables Infrastructure as Code across AWS, GCP, and Azure — multi-cloud and private cloud (OpenStack) strategies are covered for hybrid environments. ## 【Reading Tips】 - **Skim the installation chapter** (~0%–10%) if you already have Linux deployed — the Debian installer walkthrough is thorough but only relevant for fresh setups. - **Deep-read the permission and monitoring sections** (~23%–32%) — umask calculations and /proc/meminfo interpretation are foundational skills that appear throughout the rest of the book. - **Pay special attention to distribution differences** in networking (~39%–48%) — the Red Hat vs. Ubuntu configuration split (NetworkManager vs. Netplan) is a common source of confusion; bookmark the relevant sections for reference. - **Use the chapter-end questions and answers** as self-assessment checkpoints — they test practical command knowledge (e.g., systemctl enable vs. start) that mirrors real admin tasks. - **Treat the later chapters as reference material** (~60%+): CI/CD, backup, and cloud sections are better skimmed for tool awareness than memorized — return when you need to implement a specific solution. ## 【Coverage Limits】 This guide synthesizes the first ~48% of the book in detail (installation through network services and security). Later chapters on file sharing, CI/CD, backup, and cloud management are noted from the table of contents but not deeply excerpted in the source material. ##