Introduction to Linux Systems Administration (TTLX2220)

1 – System Administration Overview

• UNIX, Linux and Open Source
• Duties of the System Administrator
• Superusers and the Root Login
• Sharing Superuser Privileges with Others (su and sudo Commands)
• TCP/IP Networking Fundamentals
• Online Help

2 – Installation and Configuration

• Planning- Hardware and Software Considerations
• Site Planning
• Installation Methods and Types
• Installation Classes
• Partitions
• Logical Volume Manager – LVM
• File System Overview
• Swap Partition Considerations
• Other Partition Considerations
• The Linux Boot Loader- grub
• Software Package Selection
• Adding and Configuring Peripherals
• Printers
• Graphics Controllers
• Basic Networking Configuration
• Booting to Recovery Mode

3 – Booting and Shutting Down Linux

• Boot Sequence
• The systemd Daemon
• The systemctl Command
• Targets vs. Run Levels
• Modifying a Target
• Service Unit Scripts
• Changing System States
• Booting into Rescue Mode
• Shutdown Commands

4 – Managing Software and Devices

• Identifying Software Packages
• Using rpm to Manage Software
• Using yum to Manage Software
• Installing and Removing Software
• Identifying Devices
• Displaying Device and System Information (PCI, USB)
• Plug and Play Devices
• Device Configuration Tools

5 – Managing Users and Groups

• Setting Policies
• User File Management
• The /etc/passwd file
• The /etc/shadow file
• The /etc/group file
• The /etc/gshadow file
• Adding Users
• Modifying User Accounts
• Deleting User Accounts
• Working with Groups
• Setting User Environments
• Login Configuration Files

6 – The Linux File System

• Filesystem Types
• Conventional Directory Structure
• Mounting a File System
• The /etc/fstab File
• Special Files (Device Files)
• Inodes
• Hard File Links
• Soft File Links
• Creating New File Systems with mkfs
• The lost+found Directory
• Repairing File Systems with fsck
• The Journaling Attribute
• File and Disk Management Tools

7 – Linux File Security

• File Permissions
• Directory Permissions
• Octal Representation
• Changing Permissions
• Setting Default Permissions
• Access Control Lists (ACLs)
• The getfacl and setfacl commands
• SUID Bit
• SGID Bit
• The Sticky Bit

8 – Controlling Processes

• Characteristics of Processes
• Parent-Child Relationship
• Examining Running Processes
• Background Processes
• Controlling Processes
• Signaling Processes
• Killing Processes
• Automating Processes
• cron and crontab
• at and batch
• System Processes (Daemons)

9 – Working with the Linux Kernel

• Linux Kernel Components
• Types of Kernels
• Kernel Configuration Options
• Recompiling the Kernel

10 – Shell Scripting Overview

• Shell Script Fundamentals
• Bash Shell Syntax Overview
• Shell Script Examples

11 – System Backups

• Backup Concepts and Strategies
• User Backups with the tar Command
• System Backup Options
• The xfsdump and xfsrestore Commands

12 – Troubleshooting the System

• Common Problems and Symptoms
• Troubleshooting Steps
• Repairing General Boot Problems
• Repairing the GRUB 2 Boot Loader
• Hard Drive Problems
• Restoring Shared Libraries
• System Logs and rsyslogd

13 – Basic Networking

• Networking Services Overview
• NetworkManager Introduction
• Network Configuration Files Locations and Formats
• Enabling and Restarting Network Services with systemtcl
• Configuring Basic Networking Manually
• Configuring Basic Networking with Network Manager

14 – LAMP Server Basics

• LAMP Overview
• Configuring the Apache Web Server
• Common Directives
• Apache Virtual Hosting
• Configuring an Open Source Database
• MySQL
• MariaDB
• PHP Basics
• Perl CGI Scripting

15 – Introduction to System Security

• Security Overview
• Maintaining System Security
• Server Access
• Physical Security
• Network Security
• Security Tools
• Port Probing with nmap
• Intrusion Detection and Prevention
• PAM Security Modules
• Scanning the System
• Maintaining File Integrity
• Using Firewalls
• Introduction to firewall

16 – The Samba File Sharing Facility

• Configure Samba for Linux to Linux/UNIX File Sharing
• Configure Samba for Linux to Windows File Sharing
• Use the smbclient Utility to Transfer Files
• Mount/Connect Samba Shares to Linux and Windows Clients

17 – Networked File Systems (NFS)

• Using NFS to Access Remote File Systems
• Configuring the NFS Server
• Configuring the NFS Client
• Exporting File Systems from the NFS Server to the NFS Client