{"id":31,"date":"2025-11-30T14:48:03","date_gmt":"2025-11-30T14:48:03","guid":{"rendered":"https:\/\/adler-tech.com\/?page_id=31"},"modified":"2026-04-13T14:22:27","modified_gmt":"2026-04-13T13:22:27","slug":"debian-linux-administration","status":"publish","type":"page","link":"https:\/\/adler-tech.com\/?page_id=31","title":{"rendered":"Debian Linux Administration"},"content":{"rendered":"\n

Duration:<\/strong> 35 Hours (5 Days) Level:<\/strong> Intermediate to Advanced<\/p>\n\n\n\n

\n\n\n\n

Day 1: Ecosystem Fundamentals & The Shell Environment<\/h2>\n\n\n\n

Module 1: The Debian Philosophy and Architecture<\/h3>\n\n\n\n
    \n
  • Introduction to the Distribution<\/strong> (History, stability branches: Stable\/Testing\/Unstable, Social Contract).<\/li>\n\n\n\n
  • Version Selection Strategy<\/strong> (Choosing the right release for servers vs. workstations).<\/li>\n\n\n\n
  • Ecosystem Support Channels<\/strong> (Navigating documentation, mailing lists, Bug Tracking System, IRC\/Discord communities).<\/li>\n<\/ul>\n\n\n\n

    Module 2: CLI Competence and Access Control<\/h3>\n\n\n\n
      \n
    • Terminal Fundamentals<\/strong> (Shell prompts, distinctions between TTY and PTY, standard input\/output).<\/li>\n\n\n\n
    • Privileged Access Management<\/strong> (The root user, su<\/code> vs. sudo<\/code> workflows, graphical root limitations).<\/li>\n\n\n\n
    • Session Management<\/strong> (Virtual consoles, clean exit strategies, system power states: shutdown\/reboot).<\/li>\n\n\n\n
    • Emergency Access<\/strong> (Regaining control of a frozen console, reset<\/code>, SysRq basics).<\/li>\n\n\n\n
    • User Management Basics<\/strong> (Adding users, initial environment setup).<\/li>\n<\/ul>\n\n\n\n

      Module 3: Filesystem Hierarchy and Permissions<\/h3>\n\n\n\n
        \n
      • Navigating the VFS<\/strong> (Understanding the directory tree: \/<\/code>, \/home<\/code>, \/var<\/code>, \/etc<\/code>).<\/li>\n\n\n\n
      • Permission Models<\/strong> (Standard UGO permissions, chmod<\/code>, chown<\/code>).<\/li>\n\n\n\n
      • Default Security Contexts<\/strong> (Understanding and setting umask<\/code>).<\/li>\n\n\n\n
      • Advanced File Concepts<\/strong> (Hard links vs. Symbolic links, timestamps).<\/li>\n\n\n\n
      • Special File Types<\/strong> (Named pipes\/FIFOs, Unix sockets, Block vs. Character devices).<\/li>\n\n\n\n
      • Virtual Filesystems<\/strong> (Interacting with procfs<\/code> and sysfs<\/code> for system state).<\/li>\n<\/ul>\n\n\n\n

        Module 4: TUI Productivity: Midnight Commander (MC)<\/h3>\n\n\n\n
          \n
        • MC Fundamentals<\/strong> (Installation, interface navigation, startup options).<\/li>\n\n\n\n
        • File Management Operations<\/strong> (Copy, move, permissions, virtual FTP connection handling).<\/li>\n\n\n\n
        • Built-in Tools<\/strong> (Internal viewer\/editor, command execution within MC, sub-shell tricks).<\/li>\n\n\n\n
        • Customization<\/strong> (Menu configuration, auto-start logic).<\/li>\n<\/ul>\n\n\n\n
          \n\n\n\n

          Day 2: Advanced Shell, Text Processing & Package Management<\/h2>\n\n\n\n

          Module 5: Shell Customization and Workflow<\/h3>\n\n\n\n
            \n
          • Environment Configuration<\/strong> (Login vs. non-login shells, .bashrc<\/code>, .profile<\/code>).<\/li>\n\n\n\n
          • Variable Management<\/strong> ($PATH<\/code>, $HOME<\/code>, $LANG<\/code>, and their impact on execution).<\/li>\n\n\n\n
          • Command Line Efficiency<\/strong> (Aliases, history expansion, tab completion, key bindings).<\/li>\n\n\n\n
          • Editor Proficiency<\/strong> (Setting default editors, basic vim<\/code> survival and exit strategies).<\/li>\n\n\n\n
          • Session Recording<\/strong> (Using script<\/code> to log terminal output).<\/li>\n<\/ul>\n\n\n\n

            Module 6: Advanced Command Execution & Text Processing<\/h3>\n\n\n\n
              \n
            • Stream Redirection<\/strong> (Piping |<\/code>, standard error redirection 2><\/code>, return codes $?<\/code>).<\/li>\n\n\n\n
            • Globbing and Wildcards<\/strong> (Matching file patterns).<\/li>\n\n\n\n
            • Text Manipulation Tools<\/strong> (Introduction to grep<\/code>, sed<\/code>, awk<\/code>, cut<\/code>).<\/li>\n\n\n\n
            • Regular Expressions<\/strong> (Regex syntax, global substitution, data extraction patterns).<\/li>\n\n\n\n
            • Scripting Basics<\/strong> (One-liners for batch processing and table extraction).<\/li>\n<\/ul>\n\n\n\n

              Module 7: Software Lifecycle Management (APT Ecosystem)<\/h3>\n\n\n\n
                \n
              • Package Management Logic<\/strong> (Repositories, sources.list<\/code>, dependency resolution graphs).<\/li>\n\n\n\n
              • High-Level Tools<\/strong> (apt-get<\/code> vs. aptitude<\/code>: interactive modes, search patterns, regex filters).<\/li>\n\n\n\n
              • Operational Workflows<\/strong> (Updating, upgrading, installing, purging configs).<\/li>\n\n\n\n
              • Maintenance & Troubleshooting<\/strong> (Fixing broken dependencies, tidying orphan packages, log analysis).<\/li>\n\n\n\n
              • Release Management<\/strong> (Performing system-wide distribution upgrades).<\/li>\n<\/ul>\n\n\n\n
                \n\n\n\n

                Day 3: System Internals, Boot Process & Storage<\/h2>\n\n\n\n

                Module 8: Low-Level Package Internals<\/h3>\n\n\n\n
                  \n
                • The DPKG Backend<\/strong> (Direct .deb<\/code> manipulation, file verification, installation without APT).<\/li>\n\n\n\n
                • Metadata & Integrity<\/strong> (GPG signing, Release<\/code> files, checksums, package state flags).<\/li>\n\n\n\n
                • Advanced Configuration<\/strong> (update-alternatives<\/code> for software versions, dpkg-divert<\/code>, dpkg-statoverride<\/code>).<\/li>\n\n\n\n
                • Disaster Recovery<\/strong> (Recovering package selection lists, fixing corrupt install scripts).<\/li>\n\n\n\n
                • Repository Management<\/strong> (Backports, pinning versions, limiting bandwidth, proxy configuration).<\/li>\n<\/ul>\n\n\n\n

                  Module 9: System Initialization and Service Management<\/h3>\n\n\n\n
                    \n
                  • The Boot Sequence<\/strong> (BIOS\/UEFI -> Bootloader -> Kernel -> Init).<\/li>\n\n\n\n
                  • Runlevel\/Target Management<\/strong> (Understanding runlevels, init scripts, defaulting services).<\/li>\n\n\n\n
                  • Hardware Initialization<\/strong> (Kernel modules, udev<\/code> device management, kernel messages dmesg<\/code>).<\/li>\n\n\n\n
                  • System Identity<\/strong> (Hostname configuration, locale settings).<\/li>\n<\/ul>\n\n\n\n

                    Module 10: Storage Management & Data Security<\/h3>\n\n\n\n
                      \n
                    • Partitioning Strategies<\/strong> (UUIDs, filesystems types, integrity checks fsck<\/code>).<\/li>\n\n\n\n
                    • Volume Management<\/strong> (Extending storage via LVM, mounting options, superblock tuning).<\/li>\n\n\n\n
                    • Disk Health<\/strong> (SMART monitoring, predicting failures).<\/li>\n\n\n\n
                    • Encryption<\/strong> (LUKS\/dm-crypt for partitions, eCryptfs for directories\/swap).<\/li>\n\n\n\n
                    • Optimization<\/strong> (Using aufs<\/code>, symlinking strategies for space management).<\/li>\n<\/ul>\n\n\n\n
                      \n\n\n\n

                      Day 4: Networking, Security & Infrastructure<\/h2>\n\n\n\n

                      Module 11: Network Configuration & Optimization<\/h3>\n\n\n\n
                        \n
                      • Network Stack Basics<\/strong> (Interfaces, IP addressing, DNS resolution).<\/li>\n\n\n\n
                      • Configuration Tools<\/strong> (GUI tools vs. iproute2<\/code> suite, ifup<\/code>\/ifdown<\/code>).<\/li>\n\n\n\n
                      • Optimization & Tuning<\/strong> (MTU discovery and setting, TCP window scaling, basic Netfilter\/IPTables logic).<\/li>\n<\/ul>\n\n\n\n

                        Module 12: Network Applications & Services<\/h3>\n\n\n\n
                          \n
                        • Remote Administration (SSH)<\/strong> (Key management, ssh-agent<\/code>, tunneling\/port forwarding, config troubleshooting).<\/li>\n\n\n\n
                        • Email Infrastructure<\/strong> (MTA vs MUA, Exim4 overview, Mutt client, Procmail\/Maildrop filtering).<\/li>\n\n\n\n
                        • Protocol Clients<\/strong> (POP3\/IMAP implementations, interactions with alien clients).<\/li>\n<\/ul>\n\n\n\n

                          Module 13: Security & Authentication<\/h3>\n\n\n\n
                            \n
                          • User Security<\/strong> (Password aging, strict policies, encrypted hashes).<\/li>\n\n\n\n
                          • Authentication Subsystems<\/strong> (PAM and NSS configuration and workflow).<\/li>\n\n\n\n
                          • Access Control<\/strong> (Sudoers configuration, introduction to MAC: SELinux\/AppArmor).<\/li>\n\n\n\n
                          • Network Security<\/strong> (Securing SSH, root login restrictions, firewalling services).<\/li>\n<\/ul>\n\n\n\n

                            Module 14: The Graphical Subsystem (X11)<\/h3>\n\n\n\n
                              \n
                            • X Architecture<\/strong> (Server\/Client model, network transparency).<\/li>\n\n\n\n
                            • Session Management<\/strong> (Display Managers gdm<\/code>, starting sessions, environment variables).<\/li>\n\n\n\n
                            • Remote Graphics<\/strong> (X over SSH, X terminals).<\/li>\n\n\n\n
                            • Desktop Applications<\/strong> (Office suites, utilities, and lightweight alternatives).<\/li>\n<\/ul>\n\n\n\n
                              \n\n\n\n

                              Day 5: Maintenance, Virtualization & Data Integrity<\/h2>\n\n\n\n

                              Module 15: Process Management & Monitoring<\/h3>\n\n\n\n
                                \n
                              • Process Control<\/strong> (PS, TOP, signaling\/killing processes, priority nice<\/code>\/renice<\/code>).<\/li>\n\n\n\n
                              • Job Scheduling<\/strong> (cron<\/code> for recurring tasks, at<\/code> for one-time jobs).<\/li>\n\n\n\n
                              • System Visibility<\/strong> (Tracing syscalls, listing open files with lsof<\/code>).<\/li>\n\n\n\n
                              • Logging<\/strong> (Syslog daemon, log rotation, analyzing logs with regex).<\/li>\n<\/ul>\n\n\n\n

                                Module 16: Kernel & Hardware<\/h3>\n\n\n\n
                                  \n
                                • Kernel Compilation<\/strong> (Debian-way compilation, headers, patching).<\/li>\n\n\n\n
                                • Module Management<\/strong> (Compiling external modules, proprietary drivers).<\/li>\n\n\n\n
                                • Virtualization<\/strong> (Overview of tools, working with disk images, chroot environments).<\/li>\n<\/ul>\n\n\n\n

                                  Module 17: Data Management & Recovery<\/h3>\n\n\n\n
                                    \n
                                  • Backup Strategies<\/strong> (Archive tools: tar\/gzip\/bzip2, rsync<\/code> for synchronization).<\/li>\n\n\n\n
                                  • Binary Analysis<\/strong> (Viewing\/editing binary files, handling raw data).<\/li>\n\n\n\n
                                  • Forensics & Recovery<\/strong> (Undeleting files, analyzing file headers, secure deletion\/wiping).<\/li>\n\n\n\n
                                  • Cryptography<\/strong> (GPG key management, signing, verifying file integrity with MD5\/SHA).<\/li>\n<\/ul>\n\n\n\n

                                    Module 18: Advanced Maintenance Tips<\/h3>\n\n\n\n
                                      \n
                                    • Terminal Multiplexing<\/strong> (Deep dive into screen<\/code>: detach\/attach sessions, split screens).<\/li>\n\n\n\n
                                    • System Audit<\/strong> (Hardware identification, memory usage analysis, sound subsystem config).<\/li>\n\n\n\n
                                    • Legacy Support<\/strong> (Converting alien packages with alien<\/code>, extracting without installing).<\/li>\n<\/ul>\n\n\n\n
                                      \n","protected":false},"excerpt":{"rendered":"

                                      Duration: 35 Hours (5 Days) Level: Intermediate to Advanced Day 1: Ecosystem Fundamentals & The Shell Environment Module 1: The Debian Philosophy and Architecture Module 2: CLI Competence and Access Control Module 3: Filesystem Hierarchy and Permissions Module 4: TUI Productivity: Midnight Commander (MC) Day 2: Advanced Shell, Text Processing & Package Management Module 5: […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":11,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-31","page","type-page","status-publish","hentry"],"yoast_head":"\nDebian Linux Administration - ADLER-TECH<\/title>\n<meta name=\"description\" content=\"Solid course on how to install, configure and maintain one of the oldest running Linux Distros in the World.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/adler-tech.com\/?page_id=31\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Debian Linux Administration - 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