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
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
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
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
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
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
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
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)
Working with the Linux Kernel
Linux Kernel Components
Types of Kernels
Kernel Configuration Options
Recompiling the Kernel
Shell Scripting Overview
Shell Script Fundamentals
Bash Shell Syntax Overview
Shell Script Examples
System Backups
Backup Concepts and Strategies
User Backups with the tar Command
System Backup Options
The xfsdump and xfsrestore Commands
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
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 NetworkManager
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
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 firewalld
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
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
