Linux common boot issues and troubleshooting

所在平台: Udemy

课程主页: https://www.udemy.com/course/linux-common-boot-issues-and-troubleshooting/

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课程简介

**课程名称:Linux 常见启动问题与故障排除** **课程概述:** 本课程旨在帮助学员熟悉 Linux 系统的常见启动问题,并通过实际操作实验掌握基本的系统恢复技术。学完本课程后,您将能够: * **精通 Linux 启动故障排除:** 识别并解决常见的 Linux 启动问题,例如 initramfs 文件丢失或损坏、GRUB 引导加载程序(stage 1.5/2)丢失、主引导记录(MBR)丢失或损坏,以及关键文件(如 mount 二进制文件)丢失或 `/boot` 文件系统损坏等。 * **熟练进行系统恢复:** 掌握使用救援模式(Rescue Mode)和紧急模式(Emergency Mode)进行系统恢复,并能高效地重置 root 密码,包括使用安装盘和 `rd.break` 方法。 * **深入理解 RHEL 7:** 了解 Red Hat Enterprise Linux 7 的新特性,并与 RHEL 6 进行对比。 * **掌握 systemd:** 熟悉 systemd 的各种目标(targets)和新命令(如 systemctl、journalctl),并能熟练运用它们管理服务。 * **精通 GRUB2:** 深入了解 GRUB2 的原理、配置文件,并能熟练使用 GRUB2 提示符下的各种命令,实现内核和 initramfs 的选择启动,以及设置 GRUB 密码保护。 * **提升 Linux 使用效率:** 能够自信地从 Linux 命令行完成日常计算任务,从而提高工作效率和职业竞争力。 * **管理 Linux 内存:** 了解 Linux 内存和交换空间(Swap)的概念,并学会如何通过交换分区或交换文件来增加 swap 大小。 **课程大纲:** 1. **Linux 启动流程与故障排除 (Red Hat Linux)** * RHEL 7 启动流程(systemd) * 基本系统恢复实验: * initramfs 文件丢失/损坏 * GRUB 相关问题(stage 1.5/2 丢失) * 主引导记录(MBR)丢失/损坏 * 关键文件丢失(如 mount 二进制文件) * `/boot` 文件系统完全擦除/损坏 2. **Red Hat Enterprise Linux 7 (RHEL7)** * RHEL7 新特性概述 * 与 RHEL 6 的对比 * systemd 服务实验: * systemd 目标与新命令 * `systemctl status/stop/start/enable/disable` * 默认目标、依赖关系列表、`journalctl` * RHEL 7 启动模式: * 救援模式(Rescue Mode) * 紧急模式(Emergency Mode) * 故障排除模式 * root 密码恢复实验: * 使用安装盘重置 root 密码 * 使用 `rd.break` 重置 root 密码 3. **GRUB2 (Grand Unified BootLoader)** * GRUB 概述 * GRUB 配置文件 * GRUB2 特性与 Legacy GRUB 对比 * GRUB2 实践实验: * GRUB2 提示符下的命令 * 从 GRUB2 启动(选择 Kernel & Initramfs) * GRUB 密码保护设置 4. **Linux 增加 Swap 空间** * 内存/Swap 概述 * 通过交换分区增加 Swap * 通过交换文件增加 Swap

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课程详情

By the end of the course you will: Be able to familiar with common Linux boot problems and gets hands on experience on basic system recovery with various lab sessions.Be able to confidently use the Linux operating system to increase your productivity and Career.Be able to perform everyday computing tasks from the Linux command line. LINUX Basic Course OutlineTroubleshooting Linux Boot Problems in Red Hat Linux (Basic System Recovery) Linux Boot processBooting of RHEL 7 with systemdLab on Basic System Recovery (Initramfs file missing/Corrupted)Lab on Basic System Recovery (Grub related issues like stage 1.5/2 grub is missing)-Part1Lab on Basic System Recovery (Grub related issues like stage 1.5/2 grub is missing)-Part2Lab on Basic System Recovery (Master Boot Record missing/corrupted)Lab on Basic System Recovery (Critical files are missing like mount binary)Lab on Basic System Recovery (/boot fs is completely wiped out or corrupted)Red Hat Enterprise Linux 7Overview about RHEL7 with its new featuresComparison with RHEL 6Lab on systemd service (Familiar with different systemd targets & new commands)Practice Lab Session on systemctl status/stop/start/enable/disable Practice Lab Session on default target, list dependencies & journalctl etcBooting modes in RHEL 7Rescue mode in RHEL 7Lab on rescue modeEmergency mode in RHEL 7Lab on emergency modeTroubleshooting mode (Overview and Lab)Lab on Recovering the Root password in RHEL7Resetting the Root Password Using an Installation Disk Resetting the Root Password Using rd.breakGRand Unified BootLoader (Grub2)Overview of GrubGrub Configuration fileFeatures of Grub2 and its comparison with Legacy GrubPractical Lab Session - Different commands to run at Grub2 promptPractical Lab Session - Boot from Grub (Selecting Kernel & Initramfs)Practical Lab Session - How to make your grub password protectedIncrease Swap In LinuxOverview of Memory/SwapIncrease swap size using swap partitionIncrease swap using swap file

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