GL250 – Enterprise Linux System Administration

GL250 - Enterprise Linux System Administration

GL250 - Enterprise Linux System Administration

GL250 – 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
Course Outline:

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
Serial Ports
Random Numbers and /dev/random
Lab Tasks
Adjusting Kernel Options
Introduction to Troubleshooting Labs
Troubleshooting Practice: Kernel Modules
Boot Process & Systemd
System Boot Method Overview
systemd System and Service Manager
systemd Targets
Using systemd
Legacy Support for SysV init
Booting Linux on PCs
GRUB 2
GRUB 2 Configuration
GRUB 2 Security
Boot Parameters
Initial RAM Filesystem
init
Linux Runlevels Aliases
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
Managing Services With Systemd’s systemctl
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
Lab Tasks
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
Advanced LVM Caching
Advanced LVM Striping & Mirroring
Advanced LVM RAID Volumes
gnome-disk-utility
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
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
Lab Tasks
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
Controlling Login Sessions
system-config-authentication
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

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