Enterprise Linux Networking Services
Course Details

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Enterprise Linux Networking Services

Category ID Duration Price
Linux and Unix 13102 5 Day(s) $2,500.00
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Description

The GL275 is an expansive course that covers a wide range of network services useful to every organization. Special attention is paid to the concepts needed to implement these services securely, and to the trouble-shooting skills which will be necessary for real-world administration of these network services. Like all Guru Labs courses, the course material is designed to provide extensive hands-on experience.

Objectives

After completing this course, students will learn:
· Security with SELinux and Netfilter, DNS concepts and implementation with Bind;
· LDAP concepts and implementation using OpenLDAP;
· Web services with Apache; FTP with vsftpd; caching, filtering proxies with Squid;
· SMB/CIFS (Windows networking) with Samba
· E-mail concepts and implementation with Postfix combined with either Dovecot or Cyrus.

Prerequisites

Students should already be comfortable with basic Linux or Unix administration. Fundamentals such as the Linux filesystem, process management, and how to edit files will not be covered in class. A good understanding of network concepts, the TCP/IP protocol suite is also assumed. These skills are taught in the GL120 "Linux Fundamentals" and GL250 "Enterprise Linux Systems Administration" courses.

Outline

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

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