Duration
5 Days
30 CPD hours
This course is intended for
This is an introductory-level systems administration course geared for Systems
Administrators and users who wish to learn how to how to install, configure and
maintain an Enterprise Linux system in a networked environment.
Overview
This course is about 50% lab to lecture ratio, combining expert instructor-led
discussions with practical hands-on skills that emphasize current techniques,
best practices and standards. Working in this hands-on lab environment, guided
by our expert practitioner, attendees will explore
Installing the Linux operating system and configuring peripherals
Performing and modifying startup and shutdown processes
Configuring and maintaining basic networking services
Creating and maintaining system users and groups
Understanding and administering file permissions on directories and regular
files
Planning and creating disk partitions and file systems
Performing maintenance on file systems
Identifying and managing Linux processes
Automating tasks with cron
Performing backups and restoration of files
Working with system log files
Troubleshooting system problems
Analyzing and taking measures to increase system performance
Configuring file sharing with NFS
Configuring Samba for file sharing with the Windows clients
Setting up a basic Web server
Understanding the components for setting up a LAMP server
Implementing basic security measures
Linux System Administration is a comprehensive hands-on course that teaches
students how to install, configure and maintain an Enterprise Linux system in a
networked environment. This lab-intensive class explores core administrative
tasks such as: creating and managing users, creating and maintaining file
systems, determining and implementing security measures and performing software
installation and package management. Linux networking topics include installing
and supporting SSH, NFS, Samba and the Apache Web server. Students will explore
common security issues, as well as several tools, such as the PAM modules that
help secure the operating system and network environment. Upon successful
completion of this course, students will be prepared to maintain Linux systems
in a networked business environment. Although the course includes installing and
configuring a CentOS 7 / RHEL 7 Linux system, much of the course content also
applies to Oracle, Ubuntu, Scientific and other current versions of mainstream
Linux distributions. Labs include user and group maintenance, system backups and
restoration, software management, administration tasks automation, file system
creation and maintenance, managing remote access, working with cron, and
configuring basic file sharing and Web services, as well as working with system
logging utilities such as rsyslog and much more.
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