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Enterprise Linux System Administration Overview



  • LINUX 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



  • SYSTEMD 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



  • GRUB2/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

    • RHEL7 Configuration Utilities

    • SLES12 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



  • 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 & 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



  • LOCAL STORAGE ADMINISTRATION

    • Partitioning Disks with fdisk & gdisk

    • Resizing a GPT Partition with gdisk

    • Partitioning 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

    • Creating and Managing Filesystems

    • Hot Adding Swap

    • Setting User Quotas



  • LVM & 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

    • SLES Graphical Disk Tool

    • RAID Concepts



  • LAB TASKS

    • 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



  • REMOTE 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

    • Using autofs

    • NFS Server Configuration

    • iSCSI Initiator Configuration

    • Multipathing with iSCSI

    • USER/GROUP ADMINISTRATION

    • Approaches to Storing User Accounts

    • User and Group Concepts

    • User Administration

    • Modifying Accounts

    • Group Administration

    • Password Aging

    • Default User Files



  • LAB TASKS

    • Controlling Login Sessions

    • RHEL DS Client Configuration

    • SLES DS Client Configuration

    • System Security Services Daemon (SSSD)



  • LAB TASKS

    • User and Group Administration

    • Using LDAP for Centralized User Accounts

    • Troubleshooting Practice: Account Management



  • 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



  • SECURITY 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



  • 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

    • 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



  • ADVANCED 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



  • LOG 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



  • MONITORING & 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

    • RHEL7 Rescue Environment

    • SUSE Rescue Environment



  • LAB TASKS

    • System Activity Reporter

    • Cgroup for Processes

    • Recovering Damaged MBR



  • PRE-INSTALLATION CONSIDERATIONS

    • Pre-Installation Considerations

    • Hardware Compatibility

    • Multi-OS Booting

    • Partition Considerations

    • Filesystem Planning

    • Selecting a Filesystem



  • INSTALLING RHEL7

    • 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



  • INSTALLING SLES12

    • YaST Install Program Interface

    • Network Installation

    • SLP for SUSE Linux Installation

    • Installation Choices

    • Kernel Crash Dump Configuration

    • Network Booting with PXE

    • Creating AutoYaST2 Files

    • Using AutoYaST2 files

    • linuxrc Automation

    • Installation Diagnostics

    • After The First Reboot

    • A Typical Install



  • LAB TASKS

    • SUSE Linux Enterprise Server Installation

    • Automating Installation with AutoYaST



  • 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

    • Virtual Machine Guest Tools & Drivers

    • libguestfs and guestfish



  • LAB TASKS

    • Installing a Virtual Machine



  • BACKUPS

    • 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




 

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