Linux 网络操作系统项目教程 RHEL 8CentOS 8┃微课版┃第4版 (杨云 林哲 主编)（Z-Library）

# Linux 网络操作系统项目教程 RHEL 8/CentOS 8 (微课版, 第4版) — Reading Guide ## 【One-Line Pitch】 A hands-on, project-based textbook for learning Linux system administration on RHEL 8/CentOS 8, covering everything from installation to server configuration with practical tasks, exercises, and video resources. Ideal for vocational/college students, self-learners, and anyone preparing for RHCSA/RHCE certification. --- ## 【Book Arc】 - **Opening (~0%–10%)**: Introduces Linux history, architecture, and RHEL 8 specifics; walks through virtual machine setup, RHEL 8 installation, root password recovery, yum/dnf package management, systemd initialization, and shell basics. Establishes the "project-based" learning model with tasks, exercises, and video links. - **Early (~10%–25%)**: Covers essential Linux commands (file/directory, system info, process management) and the vim editor in depth, including command modes, editing operations, and practical case exercises. Builds the command-line foundation needed for all later projects. - **Early-to-Middle (~25%–35%)**: Moves into user and group management (useradd, passwd, groupmod, gpasswd, su) and file system basics — permissions (rwx), ownership, and the 9-character permission string. Emphasizes security best practices and root vs. regular user workflows. - **Middle (~35%–50%)**: Dives into advanced file system topics: special permissions (SGID/SUID/sticky bit), hard disk partitioning (fdisk, MBR, extended/logical partitions), device naming (/dev/sda5, NVMe), UUID-based mounting, /etc/fstab configuration, and disk quota management (xfs_quota). Includes real-world troubleshooting scenarios. - **Late (~50%–100%)**: Continues with network server configuration projects (FTP, and other services per the table of contents), system security, and troubleshooting. The final sections reference electronic supplementary videos for advanced topics and expansion material. --- ## 【Key Takeaways】 - **Project-based learning structure** (Opening): Each chapter is organized as a "project" with knowledge prep, design, implementation tasks, and practice exercises — ideal for hands-on labs and flipped classrooms. (Early) - **RHEL 8's dual-repository model** (Opening): BaseOS and AppStream repositories separate core OS packages from user-space applications, enabling independent versioning and modular software installation — a key difference from RHEL 7. (Early) - **yum v4 / dnf is the package manager** (Opening): RHEL 8 uses dnf (yum v4) with commands like `dnf install`, `dnf groupinstall`, and `dnf repolist`; understanding this is essential for software management. (Early) - **vim is a modal editor, not a word processor** (Early): Mastering the three modes (command, insert, last-line) and key operations (search, replace, block copy, line numbering) is a prerequisite for efficient server administration. (Early) - **Linux permissions are a 9-character string** (Early-to-Middle): Owner/group/other × read/write/execute; special permissions (SGID, SUID, sticky bit) solve real collaboration problems, such as shared directories where multiple users must edit each other's files. (Middle) - **Partitioning is a chain of pointers, not just slicing** (Middle): The first sector holds MBR (446B) + partition table (64B); extended partitions are pointers to logical partitions, forming a linked list — this explains the 4-primary-partition limit and why logical partitions start at number 5. (Middle) - **UUID-based mounting is more reliable than device names** (Middle): Device names like /dev/sda can change across reboots (e.g., USB insertion order), while UUIDs are stable — hence /etc/fstab should use UUIDs for consistent mounting. (Middle) - **Disk quotas require planning** (Middle): Quota works per file system (not per directory), requires /home to be a separate partition, and xfs uses different commands (xfs_quota) than ext4 — check with `df -h` and `mount` before configuring. (Middle) --- ## 【Reading Tips】 - **Skim the history and theory sections** (e.g., Linux history, copyright) if you're already familiar with Linux basics; focus instead on the task-based implementation steps and command examples. - **Deep-read the vim chapter and permission sections** — these are foundational and appear in almost every later project; the case exercises (e.g., the man_db.conf manipulation) are excellent practice. - **Pay special attention to RHEL 8-specific changes**: AppStream/BaseOS, dnf vs. yum, and xfs quota commands — these differ from older RHEL/CentOS versions and are common exam topics. - **Use the video/慕课 resources** for the hands-on projects (installation, partitioning, FTP configuration) — the text assumes you're following along with a real VM. - **Don't skip the exercises and 实践习题** at the end of each project — they reinforce exactly what RHCSA/RHCE exams test. --- ## 【Coverage Limits】 This guide covers the opening through the middle of the book (~0–50%), including installation, commands, vim, user/group management, file permissions, partitioning, and quotas. The later server-configuration projects (FTP, and other network services) and the electronic supplementary videos are not covered in detail in the sampled excerpts. --- ##