Enterprise Linux System Administration

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.

Supported Distributions:

  • Red Hat Enterprise Linux 7
  • SUSE Linux Enterprise 12
  1. LINUX KERNEL & DEVICES
    1. Hardware Discovery Tools
    2. Configuring New Hardware with hwinfo
    3. Kernel Hardware Info – /sys/
    4. /sys/ Structure
    5. udev
    6. Managing Linux Device Files
    7. List Block Devices
    8. SCSI Devices
    9. USB Devices
    10. USB Architecture
    11. Kernel Modules
    12. Configuring Kernel Components and Modules
    13. Handling Module Dependencies
    14. Configuring the Kernel via /proc/
    15. Console
    16. Virtual Terminals
    17. Serial Ports
    18. Random Numbers and /dev/random

    LAB TASKS

    1. Adjusting Kernel Options
    2. Introduction to Troubleshooting Labs
    3. Troubleshooting Practice: Kernel Modules
  2. BOOT PROCESS & SYSTEMD
    1. System Boot Method Overview
    2. systemd System and Service Manager
    3. systemd Targets
    4. Using systemd
    5. Legacy Support for SysV init
    6. Booting Linux on PCs
    7. GRUB 2
    8. GRUB 2 Configuration
    9. GRUB 2 Security
    10. Boot Parameters
    11. Initial RAM Filesystem
    12. init
    13. Linux Runlevels Aliases
    14. Systemd local-fs.target and sysinit.target
    15. Systemd basic.target and multi-user.target
    16. Legacy local bootup script support
    17. System Configuration Files
    18. RHEL7 Configuration Utilities
    19. SLES12 Configuration Utilities
    20. Shutdown and Reboot

    LAB TASKS

    1. Boot Process
    2. Booting directly to a bash shell
    3. GRUB Command Line
    4. Basic GRUB Security
    5. Managing Services With Systemd’s systemctl
    6. Troubleshooting Practice: Boot Process
  3. SOFTWARE MAINTENANCE
    1. Managing Software
    2. RPM Features
    3. RPM Architecture
    4. RPM Package Files
    5. Working With RPMs
    6. Querying and Verifying with RPM
    7. Updating the Kernel RPM
    8. Dealing With RPM & Yum Digest Changes
    9. Yum Plugins & RHN Subscription Manager
    10. YUM Repositories
    11. YUM Repository Groups
    12. Compiling/Installing from Source
    13. Manually Installed Shared Libraries
    14. Rebuilding Source RPM Packages

    LAB TASKS

    1. Managing Software with RPM
    2. Creating a Custom RPM Repository
    3. Querying the RPM Database
    4. Installing Software via RPM & Source and Rebuilding SRPMs
    5. Troubleshooting Practice: Package Management
  4. LOCAL STORAGE ADMINISTRATION
    1. Partitioning Disks with fdisk & gdisk
    2. Resizing a GPT Partition with gdisk
    3. Partitioning Disks with parted
    4. Filesystem Creation
    5. Persistent Block Devices
    6. Mounting Filesystems
    7. Resizing Filesystems
    8. Filesystem Maintenance
    9. Managing an XFS Filesystem
    10. Swap
    11. Filesystem Structures
    12. Determining Disk Usage With df and du
    13. Configuring Disk Quotas
    14. Setting Quotas
    15. Viewing and Monitoring Quotas
    16. Filesystem Attributes

    LAB TASKS

    1. Creating and Managing Filesystems
    2. Hot Adding Swap
    3. Setting User Quotas
  5. LVM & RAID
    1. Logical Volume Management
    2. Implementing LVM
    3. Creating Logical Volumes
    4. Activating LVM VGs
    5. Exporting and Importing a VG
    6. Examining LVM Components
    7. Changing LVM Components
    8. Advanced LVM Overview
    9. Advanced LVM Components
    10. Advanced LVM Caching
    11. Advanced LVM Striping & Mirroring
    12. Advanced LVM RAID Volumes
    13. gnome-disk-utility
    14. SLES Graphical Disk Tool
    15. RAID Concepts
    16. Array Creation with mdadm
    17. Software RAID Monitoring
    18. Software RAID Control and Display

    LAB TASKS

    1. Creating and Managing LVM Volumes
    2. Troubleshooting Practice: LVM
    3. Creating and Managing a RAID-5 Array
  6. REMOTE STORAGE ADMINISTRATION
    1. Remote Storage Overview
    2. Remote Filesystem Protocols
    3. Remote Block Device Protocols
    4. File Sharing via NFS
    5. NFSv4+
    6. NFS Clients
    7. NFS Server Configuration
    8. YaST NFS Server Administration
    9. Implementing NFSv4
    10. AutoFS
    11. AutoFS Configuration
    12. Accessing Windows/Samba Shares from Linux
    13. SAN Multipathing
    14. Multipath Configuration
    15. Multipathing Best Practices
    16. iSCSI Architecture
    17. Open-iSCSI Initiator Implementation
    18. iSCSI Initiator Discovery
    19. iSCSI Initiator Node Administration
    20. Mounting iSCSI Targets at Boot
    21. iSCSI Multipathing Considerations

    LAB TASKS

    1. Using autofs
    2. NFS Server Configuration
    3. iSCSI Initiator Configuration
    4. Multipathing with iSCSI
  7. USER/GROUP ADMINISTRATION
    1. Approaches to Storing User Accounts
    2. User and Group Concepts
    3. User Administration
    4. Modifying Accounts
    5. Group Administration
    6. Password Aging
    7. Default User Files
    8. Controlling Login Sessions
    9. system-config-authentication
    10. SLES DS Client Configuration
    11. System Security Services Daemon (SSSD)

    LAB TASKS

    1. User and Group Administration
    2. Using LDAP for Centralized User Accounts
    3. Troubleshooting Practice: Account Management
  8. PLUGGABLE AUTHENTICATION MODULES (PAM)
    1. PAM Overview
    2. PAM Module Types
    3. PAM Order of Processing
    4. PAM Control Statements
    5. PAM Modules
    6. pam_unix
    7. pam_nologin.so
    8. pam_limits.so
    9. pam_wheel.so
    10. pam_xauth.so

    LAB TASKS

    1. Restricting superuser access to wheel group membership
    2. Using pam_nologin to Restrict Logins
    3. Setting Limits with the pam_limits Modules
    4. Using pam_limits to Restrict Simultaneous Logins
  9. SECURITY ADMINISTRATION
    1. Security Concepts
    2. Tightening Default Security
    3. SuSE Security Checker
    4. Security Advisories
    5. Fine Grained Authorizations with Polkit
    6. File Access Control Lists
    7. Manipulating FACLs
    8. Viewing FACLs
    9. Backing Up FACLs
    10. File Creation Permissions with umask
    11. User Private Group Scheme
    12. Alternatives to UPG
    13. AppArmor
    14. SELinux Security Framework
    15. SELinux Modes
    16. SELinux Commands
    17. Choosing an SELinux Policy
    18. SELinux Booleans
    19. Permissive Domains
    20. SELinux Policy Tools
    21. SUSE Basic Firewall Configuration
    22. FirewallD

    LAB TASKS

    1. User Private Groups
    2. Using Filesystem ACLs
    3. Exploring AppArmor
    4. Exploring SELinux Modes
    5. SELinux File Contexts
  10. BASIC NETWORKING
    1. IPv4 Fundamentals
    2. TCP/UDP Fundamentals
    3. Linux Network Interfaces
    4. Ethernet Hardware Tools
    5. Network Configuration with ip Command
    6. Configuring Routing Tables
    7. IP to MAC Address Mapping with ARP
    8. Starting and Stopping Interfaces
    9. NetworkManager
    10. DNS Clients
    11. DHCP Clients
    12. SUSE YaST Network Configuration Tool
    13. Network Diagnostics
    14. Information from ss and netstat
    15. Hardware and System Clock
    16. Managing Network-Wide Time
    17. Continual Time Sync with NTP
    18. Configuring NTP Clients
    19. Useful NTP Commands

    LAB TASKS

    1. Network Discovery
    2. Basic Client Networking
    3. NTP Client Configuration
  11. ADVANCED NETWORKING
    1. Multiple IP Addresses
    2. Configuring a DHCP server
    3. IPv6
    4. Interface Aggregation
    5. Interface Bonding
    6. Network Teaming
    7. Interface Bridging
    8. 802.1q VLANS
    9. Tuning Kernel Network Settings

    LAB TASKS

    1. Multiple IP Addresses Per Network Interface
    2. Configuring IPv6
    3. Troubleshooting Practice: Networking
  12. LOG FILE ADMINISTRATION
    1. System Logging
    2. systemd Journal
    3. systemd Journal’s journactl
    4. Secure Logging with Journal’s Log Sealing
    5. gnome-system-log
    6. Rsyslog
    7. /etc/rsyslog.conf
    8. Log Management
    9. Log Anomaly Detector
    10. Sending logs from the shell

    LAB TASKS

    1. Using the systemd Journal
    2. Setting up a Full Debug Logfile
    3. Remote Syslog Configuration
    4. Remote Rsyslog TLS Configuration
  13. MONITORING & TROUBLESHOOTING
    1. System Status – Memory
    2. System Status – I/O
    3. System Status – CPU
    4. Performance Trending with sar
    5. Determining Service to Process Mapping
    6. Realtime Monitoring of Resources — Cgroups
    7. Troubleshooting Basics: The Process
    8. Troubleshooting Basics: The Tools
    9. strace and ltrace
    10. Common Problems
    11. Troubleshooting Incorrect File Permissions
    12. Inability to Boot
    13. Typos in Configuration Files
    14. Corrupt Filesystems
    15. RHEL7 Rescue Environment
    16. SUSE Rescue Environment

    LAB TASKS

    1. Recovering Damaged MBR
    2. Cgroup for Processes
  1. PRE-INSTALLATION CONSIDERATIONS
    1. Pre-Installation Considerations
    2. Hardware Compatibility
    3. Multi-OS Booting
    4. Partition Considerations
    5. Filesystem Planning
    6. Selecting a Filesystem
  2. INSTALLING RHEL7
    1. Anaconda: An Overview
    2. Anaconda: Booting the System
    3. Anaconda: Common Boot Options
    4. Anaconda: Loading Anaconda and Packages
    5. Anaconda: Storage Options
    6. Anaconda: Troubleshooting
    7. FirstBoot
    8. Kickstart
    9. Network Booting with PXE
    10. A Typical Install

    LAB TASKS

    1. Linux Installation
    2. Automating Installation with Kickstart
  3. INSTALLING SLES12
    1. YaST Install Program Interface
    2. Network Installation
    3. SLP for SUSE Linux Installation
    4. Installation Choices
    5. Kernel Crash Dump Configuration
    6. Network Booting with PXE
    7. Creating AutoYaST2 Files
    8. Using AutoYaST2 files
    9. linuxrc Automation
    10. Installation Diagnostics
    11. After The First Reboot
    12. A Typical Install

    LAB TASKS

    1. SUSE Linux Enterprise Server Installation
    2. Automating Installation with AutoYaST
  4. MANAGE VIRTUAL MACHINES
    1. Virtualization: What and Why?
    2. Introducing libvirt
    3. libvirt: Basic Concepts
    4. libvirt: Storage Architecture
    5. libvirt: Network Architecture
    6. libvirt: Graphical Tools
    7. libvirt: Command Line Tools
    8. virsh: Basics
    9. virsh: Common Tasks
    10. virt-install
    11. Virtual Machine Guest Tools & Drivers
    12. libguestfs and guestfish

    LAB TASKS

    1. Installing a Virtual Machine

Auditoriniai mokymai

Pradžios data Trukmė, d. Kurso pavadinimas Kaina, € Statusas
2019-09-23 5 RH124 Red Hat System Administration I 1500
2020-11-09 5 Linux Fundamentals 1000
2020-05-18 4 RH134 Red Hat System Administration II 1400

Nuotoliniai mokymai

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