Enterprise Linux System Administration GL250

Module 1Linux Kernel & Devices

• Hardware Discovery Tools
• Configuring New Hardware with hwinfo
• Kernel Hardware Info /sys/
• /sys/ Structure
• udev
• Managing Linux Device Files
• List Block Devices
• SCSI Devices
• USB Devices
• USB Architecture
• Kernel Modules
• Configuring Kernel Components and Modules
• Handling Module Dependencies
• Configuring the Kernel via /proc/
• Console
• Virtual Terminals
• Keyboard & locale configuration
• Serial Ports
• Random Numbers and /dev/random
• Lab Tasks
• Adjusting Kernel Options
• Linux Kernel Driver Compilation
• Introduction to Troubleshooting Labs
• Troubleshooting Practice: Kernel Modules

Module 2Systemd Overview

• System Boot Method Overview
• systemd System and Service Manager
• systemd Targets
• Using systemd
• Linux Runlevels Aliases
• Legacy Support for SysV init
• Lab Tasks
• Managing Services With Systemd's systemctl
• Creating a systemd unit file

Module 3GRUB2/Systemd Boot Process

• Booting Linux on PCs
• GRUB 2
• GRUB 2 Configuration
• GRUB 2 Security
• Boot Parameters
• Initial RAM Filesystem
• init
• Systemd local - fs.target and sysinit.target
• Systemd basic.target and multi - user.target
• Legacy local bootup script support
• System Configuration Files
• RHEL9 Configuration Utilities
• Shutdown and Reboot
• Lab Tasks
• Boot Process
• Booting directly to a bash shell
• GRUB Command Line
• Basic GRUB Security
• Troubleshooting Practice: Boot Process

Module 4Software 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 & RHN Subscription Manager
• YUM Repositories
• YUM Repository Groups
• Compiling/Installing from Source
• Manually Installed Shared Libraries
• Rebuilding 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
• Troubleshooting Practice: Package Management

Module 5Local Storage Administration

Part itioning Disks with fdisk & gdisk

• Resizing a GPT Partition with gdisk

Part itioning Disks with parted

• Filesystem Creation
• Persistent Block Devices
• Mounting Filesystems
• Resizing Filesystems
• Filesystem Maintenance
• Managing an XFS Filesystem
• Swap
• Filesystem Structures
• Determining Disk Usage With df and du
• Configuring Disk Quotas
• Setting Quotas
• Viewing and Monitoring Quotas
• Filesystem Attributes
• Lab Tasks
• Creating and Managing Filesystems
• Hot Adding Swap
• Setting User Quotas

Module 6LVM & RAID

• Logical Volume Management
• Implementing LVM
• Creating Logical Volumes
• Activating LVM VGs
• Exporting and Importing a VG
• Examining LVM Components
• Changing LVM Components
• Advanced LVM Overview
• Advanced LVM: Components & Object Tags
• Advanced LVM: Automated Storage Tiering
• Advanced LVM: Thin Provisioning
• Advanced LVM: Striping & Mirroring
• Advanced LVM: RAID Volumes
• gnome- disk - utility
• RAID Concepts
• Array Creation with mdadm
• Software RAID Monitoring
• Software RAID Control and Display
• Lab Tasks
• Creating and Managing LVM Volumes
• Troubleshooting Practice: LVM
• Creating and Managing a RAID - 5 Array

Module 7Remote Storage Administration

• Remote Storage Overview
• Remote Filesystem Protocols
• Remote Block Device Protocols
• File Sharing via NFS
• NFSv4+
• NFS Clients
• NFS Server Configuration
• YaST NFS Server Administration
• 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
• Multipathing with iSCSI

Module 8User/Group Administration

• Approaches to Storing User Accounts
• User and Group Concepts
• User Administration
• Modifying Accounts
• Group Administration
• Password Aging
• Default User Files
• Controlling Login Sessions
• RHEL DS Client Configuration
• System Security Services Daemon (SSSD)
• Lab Tasks
• User and Group Administration
• Using LDAP for Centralized User Accounts
• Troubleshooting Practice: Account Management

Module 9Pluggable 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

Module 10Security Administration

• Security Concepts
• Tightening Default Security
• SuSE Security Checker
• Security Advisories
• Fine Grained Authorizations with Polkit
• 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
• SUSE Basic Firewall Configuration
• FirewallD
• Lab Tasks
• User Private Groups
• Using Filesystem ACLs
• Exploring AppArmor
• Exploring SELinux Modes
• SELinux File Contexts

Module 11Basic 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
• SUSE YaST Network Configuration Tool
• Network Diagnostics
• Information from ss and netstat
• Hardware and System Clock
• 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

Module 12Advanced Networking

• Multiple IP Addresses
• Configuring a DHCP server
• IPv6
• Interface Aggregation
• Interface Bonding
• Network Teaming
• Interface Bridging
• 802.1q VLANS
• Tuning Kernel Network Settings
• Lab Tasks
• Multiple IP Addresses Per Network Interface
• Configuring IPv6
• Troubleshooting Practice: Networking

Module 13Log File Administration

• System Logging
• systemd Journal
• systemd Journal's journactl
• Secure Logging with Journal's Log Sealing
• gnome- system - log
• Rsyslog
• /etc/rsyslog.conf
• Log Management
• Log Anomaly Detector
• Sending logs from the shell
• Lab Tasks
• Using the systemd Journal
• Setting up a Full Debug Logfile
• Remote Syslog Configuration
• Remote Rsyslog TLS Configuration

Module 14Monitoring & Troubleshooting

• System Status Memory
• System Status I/O
• System Status CPU
• Performance Trending with sar
• Determining Service to Process Mapping
• Realtime Monitoring of Resources Cgroups
• 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
• RHEL9 Rescue Environment
• SUSE Rescue Environment
• Lab Tasks
• System Activity Reporter
• Cgroup for Processes
• Recovering Damaged MBR

Module 15Pre- Installation Considerations

• Pre - Installation Considerations
• Hardware Compatibility
• Multi- OS Booting

Part ition Considerations

• Filesystem Planning
• Selecting a Filesystem

Module 16Installing SLES12

• Anaconda: An Overview
• Anaconda: Booting the System
• Anaconda: Common Boot Options
• Anaconda: Loading Anaconda and Packages
• Anaconda: Storage Options
• Anaconda: Troubleshooting
• FirstBoot
• Kickstart
• Network Booting with PXE
• A Typical Install
• Lab Tasks
• Linux Installation
• Automating Installation with Kickstart

Module 17M anage 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
• Virtual Machine Guest Tools & Drivers
• libguestfs and guestfish
• Lab Tasks
• Installing a Virtual Machine

Module 18Backups

• Backup Software
• Managing Optical Media
• Tape Libraries
• Backup Examples
• Lab Tasks
• Using rsync and ssh for Backups
• Using tar for Backups
• Using cpio for Backups
• Creating ISO Images for Backups
• Using dump and restore for Backups