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Home > Training > Unix > Enterprise Linux Systems Administration Training

Enterprise Linux Systems Administration Training

Course#: GL250

The GL250 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. Like all Guru Labs courses, 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.

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. These skills are taught in the GL120 "Linux Fundamentals" course.

Duration

5 days

Outline of GL250 Enterprise Linux Systems Administration Training

1. 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 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/

Lab Tasks

  • Adjusting Kernel Options
  • Configuring Print Queues
  • Introduction to Troubleshooting Labs
  • Troubleshooting Practice: Kernel Modules

2. 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
  • RHEL6 Configuration Utilities
  • SLES11 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

Lab Tasks

  • Boot Process
  • GRUB Command Line
  • Basic GRUB Security
  • Managing Services With chkconfig
  • Troubleshooting Practice: Boot Process

3. Software Maintenance

  • Managing Software
  • RPM Features
  • RPM Architecture
  • RPM Package Files
  • Working With RPMs
  • Querying and Verifying with rpm
  • Updating the Kernel RPM
  • Dealing With RPM & YUM Digest Changes
  • Yum Plugins
  • YUM Repositories
  • YUM Repository Groups
  • Compiling/Installing from Source
  • Manually Installed Shared Libraries
  • Installing Source RPM Packages

Lab Tasks

  • Managing Software with RPM
  • Creating a Custom RPM Repository
  • Querying the RPM Database
  • Installing Software via RPM & Source and Rebuilding SRPMs

4. Filesystem Administration

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

Lab Tasks

  • Creating and Managing Filesystems
  • Hot Adding Swap
  • Setting User Quotas
  • Using rsync and ssh for Backups
  • Using tar and cpio for Backups
  • Using dump and restore for Backups
  • Creating ISO Images for Backups

5. 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

Lab Tasks

  • Creating and Managing LVM Volumes
  • Creating and Managing a RAID-5 Array

6. 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

Lab Tasks

  • Using autofs
  • NFS Server Configuration
  • iSCSI Initiator Configuration

7. 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)

Lab Tasks

  • User and Group Administration
  • Using LDAP for Centralized User Accounts
  • Troubleshooting Practice: Account Management
  • Using NIS for Centralized User Accounts

8. Pluggable Authentication Modules (PAM)

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

Lab Tasks

  • Restricting superuser access to wheel group membership
  • Using pam_nologin to Restrict Logins
  • Setting Limits with the pam_limits Modules
  • Using pam_limits to Restrict Simultaneous Logins

9. 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
  • SELinux Policy Tools
  • Basic Firewall Activation

Lab Tasks

  • User Private Groups
  • Using Filesystem ACLs
  • Exploring SELinux Modes
  • SELinux File Contexts

10. 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 and ss
  • Managing Network-Wide Time
  • Continual Time Sync with NTP
  • Configuring NTP Clients
  • Useful NTP Commands

Lab Tasks

  • Network Discovery
  • Basic Client Networking
  • NTP Client Configuration

11. Advanced Networking

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

Lab Tasks

  • Multiple IP Addresses Per Network Interface
  • Configuring IPv6
  • Troubleshooting Practice: Networking

12. Log File Administration

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

Lab Tasks

  • Setting up a Full Debug Logfile
  • Remote Syslog Configuration

13. Monitoring & Troubleshooting

  • System Status - Memory
  • System Status - I/O
  • System Status - CPU
  • Performance Trending with sar
  • Process Accounting
  • Troubleshooting Basics: The Process
  • Troubleshooting Basics: The Tools
  • strace and ltrace
  • Common Problems
  • Troubleshooting Incorrect File Permissions
  • Inability to Boot
  • Typos in Configuration Files
  • Corrupt Filesystems
  • RHEL6 Rescue Environment
  • SUSE Rescue Environment

Lab Tasks

  • Recovering Damaged MBR
  • Using BSD Process Accounting

15. Pre-Installation Considerations

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

16. 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

Lab Tasks

  • Linux Installation
  • Automating Installation with Kickstart

17. Installing SLES11

  • YaST Install Program Interface
  • Network Installation
  • SLP for SUSE Linux Installation
  • Installation Choices
  • Kernel Crash Dump Configuration
  • Creating AutoYaST2 Files
  • Using AutoYaST2 files
  • linuxrc Automation
  • Installation Diagnostics
  • After The First Reboot
  • A Typical Install

Lab Tasks

  • SUSE Installation
  • Automating Installation with AutoYaST

18. iSCSI Target Configuration

  • iSCSI Target Implementations
  • iSCSI Target Configuration (tgt)
  • iSCSI Target LUN Configuration (tgt)
  • iSCSI Target Auth Configuration (tgt)
  • iSCSI Persistent Configuration (tgt)

19. Manage Virtual Machines

  • Virtualization: What and Why?
  • Introducing libvirt
  • libvirt: Basic Concepts
  • libvirt: Storage Architecture
  • libvirt: Network Architecture
  • libvirt: Graphical Tools
  • libvirt: Command Line Tools
  • virsh: Basics
  • virsh: Common Tasks
  • virt-install
  • libguestfs and guestfish

Lab Tasks

  • Installing a Virtual Machine
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