Enterprise Linux Networking Services

1. Linux Kernel & Devices
· Hardware Discovery Tools
· Kernel Hardware Info – /sys/
· /sys/ Structure
· udev
· Managing Linux Device Files
· List Block Devices
· SCSI Devices
· USB Devices
· USB Configuration
· Kernel Modules
· Configuring Kernel Components
· Handling Module Dependencies
· Console
· Virtual Terminals
· Serial Ports

Lab Tasks
· Adjusting Kernel Options
· Introduction to Troubleshooting Labs
· Troubleshooting Practice: Kernel

2. Boot Process & SysV Init
· Systemd System and Service Manager
· Systemd Targets
· Using systemd
· Legacy Support for SysV init
· Booting Linux on PCs
· GRUB2 Configuration
· GRUB2 Security
· Boot Parameters
· Initial RAM Filesystem
· System Init Styles Overview
· 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
· Shutdown and Reboot

Lab Tasks
· Boot Process
· GRUB Command Line
· Basic GRUB Security
· Managing Services With Systemd's systemctl
· 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 & 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

4. Local Storage Administration
· Partitioning Disks with fdisk
· 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

5. LVM & RAID
· Logical Volume Management
· Implementing LVM
· Creating Logical Volumes
· Manipulating VGs & LVs
· Advanced LVM Concepts
· gnome-disk-utility
· 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
· NFS Server Configuration
· iSCSI Initiator Configuration
· Multipathing with iSCSI

7. User/Group Administration
· User and Group Concepts
· User Administration
· Modifying Accounts
· Group Administration
· Password Aging
· Default User Files
· Controlling Logins
· system-config-authentication
· System Security Services Daemon (SSSD)

Lab Tasks
· User and Group Administration
· Using LDAP for Centralized User Accounts
· Troubleshooting Practice: Account Management

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
· 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
· 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
· 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

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
· Systemd Journal
· gnome-system-log
· Rsyslog
· /etc/rsyslog.conf
· Log Management
· Log Anomaly Detector

Lab Tasks
· Using the Systemd Journal
· Setting up a Full Debug Logfile
· Remote Syslog Configuration
· Remote Rsyslog TLS Configuration

13. 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

Lab Tasks
· Recovering Damaged MBR
· Cgroup for Processes

14. Pre-Installation Considerations
· Pre-Installation Considerations
· Hardware Compatibility
· Multi-OS Booting
· Partition Considerations
· Filesystem Planning
· Selecting a Filesystem

15. 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

16.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

Lab Tasks
· Installing a Virtual Machine

17. 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