applied linux.

Study maps

Certification tracks

The book teaches you Linux. These maps point you at a credential. Each one follows the official objectives, so you can read straight down the list and check off what you already know. Pick the rung that matches where you are.

  1. EntryCompTIA

    Linux+ — the Applied Linux book

    You're already here. The ten-chapter book maps to the CompTIA Linux+ domains: system config, services, security, scripting, networking, storage, and troubleshooting.

    Start reading →
  2. Junior adminLPI

    LPIC-1 — Linux Administrator

    Two exams (101 / 102). The day-to-day of running one machine.

    • 101 System Architecture
    • 102 Linux Installation & Package Management
    • 103 GNU & Unix Commands
    • 104 Devices, Filesystems & the FHS
    • 105 Shells & Shell Scripting
    • 106 User Interfaces & Desktops
    • 107 Administrative Tasks
    • 108 Essential System Services
    • 109 Networking Fundamentals
    • 110 Security
  3. EngineerLPI

    LPIC-2 — Linux Engineer

    Two exams (201 / 202). Many machines, real services: kernel, storage, DNS, web, mail, file sharing, network security.

    • Capacity planning & the Linux kernel
    • System startup & filesystem / device management
    • Advanced storage: RAID, LVM
    • Network configuration & troubleshooting
    • DNS (BIND), web (Apache/nginx), proxies
    • File sharing (Samba / NFS)
    • Mail (Postfix / Dovecot) & network clients
    • System security & firewalls
  4. SpecialistLPI

    LPIC-3 — Enterprise specialties

    Single-exam specialties; pick the one that matches your work.

    • 300 Mixed Environments — Samba & AD integration
    • 303 Security — encryption, access control, intrusion detection
    • 305 Virtualization & Containerization
    • 306 High Availability & Storage Clusters
  5. EngineerLinux Foundation

    LFCE — Certified Engineer

    Performance-based: you operate a live system, not a multiple-choice sheet. Design, implement, and troubleshoot enterprise environments.

    • System configuration & management
    • Networking: interfaces, routing, services
    • Storage: partitions, LVM, RAID, network storage
    • Security: SSH, firewalls, ACLs, hardening
    • Service management with systemd
    • Backup, data integrity & recovery
  6. CourseLinux Foundation

    LFS211 / LFS311 — Linux Networking & Administration

    The Linux Foundation's networking course, the lab-heavy path toward LFCE. Nineteen chapters, each ending in hands-on labs.

    • Linux networking concepts & the OSI model
    • Network configuration (runtime & boot-time)
    • Troubleshooting & monitoring
    • Remote access & cryptography (OpenVPN, SSH)
    • DNS with BIND — zones & views
    • HTTP & advanced HTTP (Apache, vhosts, balancing)
    • Email (Postfix / Dovecot)
    • File sharing (FTP, rsync, SSH protocols)
    • Advanced networking: routing, VLANs, DHCP, NTP
    • HTTP caching (Squid)
    • Network filesystems (NFS, SMB/CIFS)
    • Network security & firewalls (iptables / nft)
    • LXC virtualization & high availability (DRBD)
    • Databases & SQL · system logging
    • Package management & building RPM/Debian packages