Linux 管理與進階故障排除技巧

Contents

基於專案來獲得 Linux 技能，提升你的職業生涯並取得成功：40 多個小時，400 多個講座。

從這 41 小時的課程，你會學到

基本概念， Unix/Linux 簡介及歷史
Bash (Bourne Again SHell，簡稱 bash) 檔案、變數和標準輸入輸出重定向 Bash
Linux 使用者管理
Red Hat Linux 的許可權
用 ACLs 控制對檔案的訪問
過程管理
核心( Kernel )模組
磁碟分割槽、檔案系統建立和 RAID 配置
邏輯磁碟管理員管理( Logical Volume Manager Administration )
RPM (Red Hat Package Manager，紅帽套裝管理器)
YUM (Yellowdog Updater, Modified)
Linux 作業系統小升級
FTP – 檔案傳輸協議( File Transfer Protocol )
Apache Web 伺服器管理
DNS (域名系統，Domain Name System) 域名系統
Samba 伺服器概念和配置
NFS – 網路檔案系統( Network File System )
採用啟動件自動安裝
Linux 的網路概念
Linux 效能監控
Linux 啟動( Boot )問題的故障排除(基本系統恢復)
Red Hat Enterprise Linux 7 概述
GRand Unified BootLoader (Grub2)
RHEL 7 上的 Kdump 配置
Red Hat Satellite 6.2 概述
管理 SELinux 安全性
備份和恢復
Linux 命令教程
高階 Linux 命令
Linux Crontab
OpenSSH
Postfix 郵件伺服器配置

要求

PC 或筆記本電腦與網繼網路連接
這門課不需要有正式的先修知識; 然而，有在其他作業系統上的系統管理員經驗將非常有用。

課程說明

在課程結束時，你將：

能有信心地使用 Linux 作業系統來提升你的工作效率和職業生涯。
能夠從 Linux 命令行執行日常計算任務。

課程大綱

LINUX Basic Course Outline

Linux basic concepts,Introduction & History of Unix/Linux

Introduction to Unix
History of UNIX
What is LINUX
History of Linux
LINUX Distributions
Unix File System

Linux Commands Tutorials

Lecture on various commands with proper explanation with examples on live environment.
Overview of File System Structure
pwd, cd, ls, less, cp, file mkdir. more. mv, cat, rm rmdir, wc, dd, head, tail, touch, ln etc

Bash Variables & Standard Input output Redirecting

Familiar with Variables
Bash variable, Environmental variable & System Variables
Lab
Standard Input & Output Redirecting ( > , 2> ,&> )
Standard Input and Output
Redirecting Output to a File
Redirecting Output to a File
Lab

User management :

Understanding different types of groups and creation of groups
Creation of users in different groups
Understanding Passwd, Shadow Files
Understanding passwd aging
Creation of quotas for users, groups and file systems
Understanding users security files
password aging policy using chage commands
TROUBLESHOOTING

Permissions in Red Hat Linux

Basic File Permissions
User Based permissions groups
Permission Types
Change of permissions & ownership
Special Permissions
Setuid, Setguid, Sticky bit, ACL etc
Two Labs to demonstrate the permissions from real IT industry environment.

Linux Crontab

Overview of Linux Crontab & its format
Schedule a job for a specific period of time
Schedule a job for more then one instance (e.g. twice a day)
Schedule a job for specific range of time
Schedule a job every weekday during working hours
how to view crontab entries?
Schedule a job for every minute using cron

Linux Find Commands

Basic find commands for finding files with names
Find files based on their permissions
Search files based on owners & groups
Find files and directories based on date & time
Find files and directories based on size

OpenSSH

Overview of OpenSSH
What Are Some Of The OpenSSH Features?
OpenSSH options are controlled through the /etc/ssh/sshd_config file
Lab Session

Telnet

Overview about telnet
Configuration of telnet server on Linux
Xinetd Service

Process Management

Understanding ps commands with custom properties & Nice values etc
Different stats of a process like “D”, “S”, “T”, “Z” etc
Kill commands to terminate the process
Lab

Kernel Modules

What is Kernel & its features
Kernel Modules
Commands to manipulate the kernel (insmod,lsmod,modinfo,modprobe &rmmod)
How to know the name of the module or kernel driver for any deivce like lan
Lab

Disk Partitions, File Systems Creations & RAID Configuration

Creating the partitions in a simple disk using fdisk
Understanding the different options in fdisk utility
Creating File Sytems using (ext3/ext4/xfs FS)
Mounting/Umounting FS
Entry in fstab
Introduction to RAID
Concepts & features of RAID
RAID Level
How to configure different level of Raids like (0,1,5,6 etc)
Lab Sessions

Logical Volume Manager Administration

LVM Architecture Overview
LVM Components
LVM Logical Volumes
Logical Volume Creation Overview
Growing a File System on a Logical Volume
Logical Volume Backup
LVM Administration with CLI Commands
Using CLI Commands
Physical Volume Administration
Creating Physical Volumes
Displaying Physical Volumes
Preventing Allocation on a Physical Volume
Resizing a Physical Volume
Removing Physical Volumes
Volume Group Administration
Creating Volume Groups
Adding Physical Volumes to a Volume Group
Displaying Volume Groups
Removing Physical Volumes from a Volume Group
Changing the Parameters of a Volume Group
Activating and Deactivating Volume Groups
Removing Volume Groups
Overview about LVM Metadata
Metadata Contents
How to identify and recover failed LVM disk

RPM (Red Hat Package Manager)

Install : It is used to install any RPM package.
Remove : It is used to erase, remove or un-install any RPM package.
Upgrade : It is used to update the existing RPM package.
Verify : It is used to query about different RPM packages.
Query : It is used for the verification of any RPM package.

YUM (Yellowdog Updater, Modified)

Overview of YUM
Configuration& and installation of yum on Red Hat Linux Server
Lab-1
Lab-2
Yum History Command
Reverting and Repeating Transactions like undo & redo using yum command

Linux OS Minor Upgrade

Linux OS upgrade from RHEL 7.1 to RHEL 7.2
Lab Practice Sessions

File Transfer Protocol on RHEL 7

Overview of FTP Server
Installation and configuration of FTP Server
Lab-1
Lab-2

Apache Web Server Administration

Basic Setup
Verify installation
Package files
Main configuration file(s)
Backup
Edit the httpd.conf configuration file
ServerRoot
PidFile
ServerName
Add site to /etc/hosts file
DocumentRoot
ErrorLog
Listen
Create your HTML documents
Start the Web Server
Access the web site
Local access
Internal & external access
Summary of basic setup

DNS (Domain Name System)

Overview of DNS
Understanding root & top level domains
How dns works practically
What happens when I type any website name in the address bar of the browser

Network File System (NFS) on RHEL 7

Overview of NFS Server
Installation and configuration of NFS Server
Lab-1
Lab-2

Automating Installation using kickstart

Overview of Kickstart Server
Features of Kickstart Server
Configuration & Installation of Kickstart Server
Configuration of dhcp, tftpd, nfs for Kickstart Server
Configuration of kickstart config file using graphical mode
PXE Boot Environment
Lab Session
Unattended Client boot and do the installation via network

How to find HBA details & Storage Connectivity & Scan new disks/luns on Red Hat Linux Physical Server

How’s HBA/FC’s are connected to the Linux Physical Server
Lab on Live production Environment
How storage disks are connected to the server
What all the paths of a disk to access the SAN Storage via round robin request
Lab on understanding the disks paths via different HBA/FC Card.
How to scan new luns coming from storage on Red Hat Linux

Networking Concepts in RHEL 7

New Sets of commands introduced in RHEL 7 for managing the network interfaces.

Check the status of ethernet interfaces
Add and configure the new ethernet interface
Activate the network services
Commands to change the network properties of an existing interface
Delete the ethernet interface
Learning of various new commands related to managing network interfaces.
Overview of Routing Table
Understanding the output of netstat -rn or route -n output
Lab

Linux Performance Monitoring

Introduction about Performance monitoring in Linux
Important four subsystems that needs to be monitored.

1. CPU
2. Memory
3. I/O
4. Network

Familiar & understanding with CPU Utilization
Like Context switches, Run Queue, CPU utilization & Load Average
Familiar & understanding with Memory Utilization
Familiar & understanding with I/O Analyses
Familiar & understanding with Network Monitoring
Familiar with various Commands to manage performance issues in Linux Servers
top

Troubleshooting Linux Boot Problems in Red Hat Linux 6/7 (Basic System Recovery) – Advanced Level

Simple & step by step understanding of Linux Boot Process ( 2 detailed Sessions)
Overview of Red Hat Linux 7 and their features
Comparison of features of RHEL7 with RHEL6
Lab on Basic System Recovery (Initramfs file missing/Corrupted)
Lab on Basic System Recovery (Grub related issues like stage 1.5/2 grub is missing)-Part1
Lab on Basic System Recovery (Grub related issues like stage 1.5/2 grub is missing)-Part2
Lab on Basic System Recovery (Master Boot Record missing/corrupted)
Lab on Basic System Recovery (Critical files are missing like mount binary, incorrect entry in fstab etc)
Lab on Basic System Recovery (Critical files are missing like mount binary, incorrect entry in fstab etc)

Red Hat Enterprise Linux 7

Overview about RHEL7 with its new features
Comparison with RHEL 6
Lab on systemd service (Familiar with different systemd targets & new commands)
Rescue mode in RHEL 7
Lab on rescue mode
Emergency mode in RHEL 7
Lab on emergency mode
Troubleshooting mode (Overview and Lab)
Lab on Recovering the Root password in RHEL7
- Resetting the Root Password Using an Installation Disk
- Resetting the Root Password Using rd.break

Kdump configuration on RHEL 7

Overview of kdump
How to enable Kdump on RHEL 7
Lab Session

Red Hat Satellite 6.2

Overview of Satellite Server
Pre-Requisites (What needs to be done before initiating the Red Hat Satellite Server installation)
Registering the server using subscription manager
Installing the Satellite Server Packages & updating the Server
Installing satellite from the Offline Repositories.
Initial Configuration for the satellite server
Registering Satellite
Downloading/Uploading manifest (Importing manifest to Installed Satellite server)
Attaching a subscription
Create Red Hat Repo’s as per the environment requirement
Creating Activation
Registering server (Red Hat Satellite client)
Recap