Enterprise Linux System Administration

Course:  LNXADM
Duration:  5 Days
Level:  I
Course Summary

The Enterprise Linux System Administration class is an in-depth course that explores installation, configuration and maintenance of Linux systems. The course focuses on issues universal to every workstation and server. The course material is designed to provide extensive hands-on experience.

Topics include: installation and configuration; the boot process; user and group administration; filesystem administration, including quotas, FACLs, RAID and LVM; task automation; client networking; SELinux; software management; log files; troubleshooting; and more.

The course covers both RedHat and SuSE Enterprise distributions, and students can choose to use either distribution during hands-on sessions.

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Topics Covered In This Course

Linux Hardware Discovery, Interaction, and Control

  • Hardware Discovery Tools
  • Configuring New Hardware with hwinfo
  • Hardware and System Clock
  • Console
  • Virtual Terminals
  • Serial Ports
  • SCSI Devices
  • USB Devices
  • USB Configuration
  • Common UNIX Printing System
  • Defining a Printer
  • Managing Optical Media
  • Tape Drives
  • Tape Libraries
  • Managing Linux Device Files
  • Kernel Hardware Info - /sys/
  • /sys/ Structure
  • udev
  • Kernel Modules
  • Configuring Kernel Components and Modules
  • Handling Module Dependencies
  • Configuring the Kernel via /proc/

Boot Process and SysV Init

  • Booting Linux on PCs
  • GRUB Configuration
  • Boot Parameters
  • Initial ramdisk
  • /sbin/init
  • System Init Styles
  • Linux Runlevels
  • /etc/inittab
  • /etc/rc.d/rc.sysinit
  • SUSE /etc/init.d/boot
  • Runlevel Implementation
  • System Configuration Files
  • Configuration Utilities
  • Novell's Configuration Utilities
  • Typical SysV Init Script
  • The /etc/rc.local File
  • The /etc/init.d/*.local Files
  • Managing Daemons
  • Controlling Service Startup
  • Shutdown and Reboot

Software Maintenance

  • Managing Software
  • RPM Features
  • RPM Architecture
  • RPM Package Files
  • Working With RPMs
  • Querying and Verifying with rpm
  • Updating the Kernel RPM
  • Managing Software Dependencies
  • Using the YUM command
  • Using the Zypper command
  • YUM package groups
  • Zypper Services and Catalogs
  • Dealing With RPM & YUM Digest Changes
  • Configuring YUM
  • Yum Plugins
  • YUM Repositories
  • Compiling/Installing from Source
  • Manually Installed Shared Libraries
  • Installing Source RPM Packages

Filesystem Administration

  • Partitioning Disks with fdisk
  • Partitioning Disks with parted
  • Filesystem Creation
  • Mounting Filesystems
  • Filesystem Maintenance
  • Persistent Block Devices
  • Resizing Filesystems
  • Swap
  • Two Types of Disk Space
  • Determining Disk Usage With df and du
  • Configuring Disk Quotas
  • Setting Quotas
  • Viewing and Monitoring Quotas
  • Filesystem Attributes
  • Backup Software
  • Backup Examples

LVM & RAID

  • Logical Volume Management
  • Implementing LVM
  • Creating Logical Volumes
  • Manipulating VGs & LVs
  • Advanced LVM Concepts
  • system-config-lvm
  • SLES Graphical Disk Tool
  • RAID Concepts
  • Array Creation with mdadm
  • Software RAID Monitoring
  • Software RAID Control and Display

Remote Storage Administration

  • Remote Storage Overview
  • Remote Filesystem Protocols
  • Remote Block Device Protocols
  • File Sharing via NFS
  • NFSv4
  • NFS Clients
  • NFS Server Configuration
  • Implementing NFSv4
  • AutoFS
  • AutoFS Configuration
  • Accessing Windows/Samba Shares from Linux
  • SAN Multipathing
  • Multipath Configuration
  • Multipathing Best Practices
  • iSCSI Architecture
  • Open-iSCSI Initiator Implementation
  • iSCSI Initiator Discovery
  • iSCSI Initiator Node Administration
  • Mounting iSCSI Targets at Boot
  • iSCSI Multipathing Considerations

User/Group Administration

  • User and Group Concepts
  • User Administration
  • Modifying Accounts
  • Group Administration
  • Password Aging
  • Default User Files
  • Controlling Logins
  • Manual DS Client Configuration
  • system-config-authentication
  • SLES Graphical DS Client Configuration
  • System Security Services Daemon (SSSD)

Pluggable Authentication Modules (PAM)

  • PAM Overview
  • PAM Module Types
  • PAM Order of Processing
  • PAM Control Statements
  • PAM Modules
  • pam_unix.so
  • pam_unix2.so
  • pam_nologin.so
  • pam_limits.so
  • pam_wheel.so
  • pam_xauth.so

Security Administration

  • Security Concepts
  • Tightening Default Security
  • SuSE Security Checker
  • Security Advisories
  • File Access Control Lists
  • Manipulating FACLs
  • Viewing FACLs
  • Backing Up FACLs
  • File Creation Permissions with umask
  • User Private Group Scheme
  • Alternatives to UPG
  • AppArmor
  • SELinux Security Framework
  • SELinux Modes
  • SELinux Commands
  • Choosing an SELinux Policy
  • SELinux Booleans
  • Permissive Domains
  • Graphical SELinux Policy Tools

Process Administration

  • Automating Tasks
  • at/batch
  • cron
  • The crontab Command
  • crontab Format
  • /etc/cron.*/ Directories
  • anacron
  • Viewing Processes
  • Managing Processes
  • Tuning Process Scheduling
  • Process Accounting
  • Enabling Process Accounting
  • Setting Resource Limits via ulimit

Basic Networking

  • IPv4 Fundamentals
  • TCP/UDP Fundamentals
  • Linux Network Interfaces
  • Ethernet Hardware Tools
  • Network Configuration with ip Command
  • Configuring Routing Tables
  • IP to MAC Address Mapping with ARP
  • Starting and Stopping Interfaces
  • NetworkManager
  • DNS Clients
  • DHCP Clients
  • system-config-network{tui,cmd}
  • SUSE YaST Network Configuration Tool
  • Network Diagnostics
  • Information from netstat
  • Managing Network-Wide Time
  • Continual Time Sync with NTP
  • Configuring NTP Clients
  • Useful NTP Commands

Advanced Networking

  • Multiple IP Addresses
  • Configuring a DHCP server
  • Enabling IPv6
  • Interface Bonding
  • Interface Bridging
  • 802.1q VLANS
  • Tuning Kernel Network Settings

The X Window System

  • The X Window System
  • X Modularity
  • X.Org Drivers
  • Configuring X Manually
  • Automatic X Configuration
  • Automatic X Configuration - SLES
  • Xorg and Fonts
  • The X Font Server
  • Installing Fonts for Modern Applications
  • Installing Fonts for Legacy Applications
  • The X11 Protocol and Display Names
  • Display Managers and Graphical Login
  • Starting X Apps Automatically
  • X Access Control
  • Remote X Access (historical/insecure approach)
  • Remote X Access (modern/secure approach)
  • XDMCP
  • Remote Graphical Access With VNC and RDP
  • Specialized X Servers

Log File Administration

  • System Logging
  • Syslog-ng
  • Rsyslog
  • /etc/rsyslog.conf
  • Log Management
  • Log Anomaly Detector

Monitoring & Troubleshooting

  • System Status - Memory
  • System Status - I/O
  • System Status - CPU
  • Performance Trending with sar
  • Troubleshooting Basics: The Process
  • Troubleshooting Basics: The Tools
  • strace and ltrace
  • Common Problems
  • Incorrect File Permissions
  • Inability to Boot
  • Typos in Configuration Files
  • Corrupt Filesystems
  • Rescue Environment
  • SUSE Rescue Environment

Pre-Installation Considerations

  • Pre-Installation Considerations
  • Hardware Compatibility
  • Multi-OS Booting
  • Partition Considerations
  • Filesystem Planning
  • Selecting a Filesystem

Installing RHEL6

  • Anaconda: An Overview
  • Anaconda: Booting the System
  • Anaconda: Common Boot Options
  • Anaconda: Loading Anaconda and Packages
  • Anaconda: Storage Options
  • Anaconda: Troubleshooting
  • FirstBoot
  • Kickstart
  • A Typical Install

Installing SLES11

  • Installation Choices
  • DVD-ROM Install Media
  • Network Installation
  • SLP for SUSE Linux Installation
  • Local Hard Drive Installation
  • The linuxrc Program
  • Install Program Interface
  • Installation Diagnostics
  • Language/Keyboard Selection and EULA
  • Installation Mode
  • Clock and Time Zone
  • Desktop Selection
  • Server Base Scenario
  • The YaST Installer Design
  • Disk Partitioning
  • Boot Loader Configuration
  • Software Package Selection
  • Kernel Crash Dump Configuration
  • Confirmation and File Installation
  • Setting the Root Password
  • Hostname and Domain Name
  • Network Configuration
  • SLES Services Configuration
  • Adding a User Account
  • Release Notes
  • Final Installation Hub
  • Installation Complete and AutoYaST2 "Cloning"
  • Using AutoYaST2 files
  • Creating AutoYaST2 Files
  • linuxrc Automation

Xen Virtualization

  • Virtualization: What and Why?
  • What is Xen?
  • Xen Architecture
  • Xen Deployment Options and Considerations
  • Xen Networking
  • Live Migration of Xen Virtual Servers
  • xend Configuration
  • Guest Config Files
  • The xm Command
  • Common xm Usage
  • Xen Configuration Tools

Linux Kernel Compilation

  • Why Compile?
  • Getting Kernel Source
  • Preparing to Compile
  • Configuring Kernel Compilation Options
  • Available Kernel Compile Options
  • Compiling the Kernel
  • Install Compiled Kernel Modules
  • Installing the Kernel
  • Tips and Tricks
Recommended Prerequisites

Students should already be comfortable working in a Linux or UNIX environment. Fundamentals such as the Linux filesystem, process management, and how to edit files will not be covered in class. An understanding of network concepts and the TCP/IP protocol suite is helpful.

Training Style

Combination of lecture sessions and hands-on practice.

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Schedule For This Course
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