Server Infrastructure Linux for Unix Administrators

Linux for Unix Administrators

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  • Course Delivery: Virtual Classroom
  • Language: English

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Description

The GL615 is an accelerated course combining the topics in the GL250 ""Enterprise Linux Systems Administration"", and the GL275 ""Enterprise Linux Networking Services"".

 

Course Objectives

After completing this course, students will learn:

  • Linux Orientation
  • Linux Kernel & Hardware
  • Boot Process & SysV Init
  • Software Maintenance
  • Local Storage Administration
  • LVM & RAID
  • Remote Storage Administration
  • User/Group Administration
  • Security Administration
  • Process Administration
  • Networking
  • Monitoring & Troubleshooting
  • BIND DNS
  • OpenLDAP
  • vsFTPd & Apache
  • SQUID Proxy Server
  • Installing RHEL7
  • Postfix
  • Email Services
  • Samba

 

Topics Covered

1. Linux Orientation
  • FSF and GNU
  • GPL – General Public License
  • Linux Kernel and Versioning
  • Components of a Distribution
  • SUSE Linux Products
  • Red Hat Linux Products

2. Linux Kernel & Hardware
  • Hardware Discovery Tools
  • Hardware and System Clock
  • Console
  • Virtual Terminals
  • Serial Ports
  • SCSI Devices
  • USB Configuration
  • Defining a Printer
  • Tape Libraries
  • Managing Linux Device Files
  • Kernel Hardware Info – /sys/
  • /sys/ Structure
  • udev
  • Kernel Modules
  • Configuring Kernel Components and Modules
  • Handling Module Dependencies
  • Configuring the Kernel via /proc/
  • System Tools

Lab Tasks
  • Adjusting Kernel Options
  • Configuring Print Queues
  • Introduction to Troubleshooting Labs
  • Troubleshooting Practice: Kernel Modules

3. Boot Process & SysV Init
  • systemd System and Service Manager
  • systemd Targets
  • Using systemd
  • Legacy Support for SysV init
  • Booting Linux on PCs
  • GRUB 2
  • GRUB2 Configuration
  • GRUB2 Security
  • Boot Parameters
  • Initial RAM Filesystem
  • init
  • 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

4. Software Maintenance
  • RPM Architecture
  • Working With RPMs
  • Querying and Verifying with RPM
  • Updating the Kernel RPM
  • Using the Yum command
  • YUM package groups
  • Configuring Yum
  • YUM Repositories
  • Rebuilding Source RPM Packages
  • Software Tools Comparison Matrix

Lab Tasks
  • Managing Software with RPM
  • Creating a Custom RPM Repository
  • Querying the RPM Database
  • Installing Software via RPM & Source and Rebuilding SRPMs
  • Using Yum

5. Local Storage Administration
  • Partitioning Disks with fdisk
  • Partitioning Disks with parted
  • Filesystem Creation
  • Mounting Filesystems
  • Filesystem Maintenance
  • Resizing Filesystems
  • Managing an XFS Filesystem
  • Swap
  • Filesystem Attributes
  • Filesystem Creation and Management

Lab Tasks
  • Creating and Managing Filesystems
  • Hot Adding Swap

6. 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
  • LVM and RAID: Unix Tool Comparison

Lab Tasks
  • Creating and Managing LVM Volumes
  • Creating and Managing a RAID-5 Array

7. Remote Storage Administration
  • Remote Storage Overview
  • Remote Filesystem Protocols
  • Remote Block Device Protocols
  • NFS Clients
  • NFS Server Configuration
  • Implementing NFSv4
  • AutoFS
  • AutoFS Configuration
  • SAN Multipathing
  • Multipath Configuration
  • Multipathing Best Practices
  • iSCSI Architecture
  • Open-iSCSI Initiator Implementation

Lab Tasks
  • Using autofs
  • NFS Server Configuration
  • iSCSI Initiator Configuration

8. User/Group Administration
  • User and Group Concepts
  • User Administration
  • Modifying Accounts
  • Group Administration
  • Password Aging
  • Default User Files
  • Controlling Logins
  • system-config-authentication
  • PAM Overview
  • PAM Module Types
  • PAM Order of Processing
  • PAM Control Statements
  • pam_wheel.so
  • pam_limits.so
  • User/Group Administration Comparison Matrix

Lab Tasks
  • User and Group Administration
  • Using LDAP for Centralized User Accounts
  • Troubleshooting Practice: Account Management
  • Restricting superuser access to wheel group membership
  • 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
  • TCP Wrappers Concepts
  • TCP Wrappers Concepts
  • Xinetd
  • Netfilter Concepts
  • Using the iptables Command
  • Common match_specs
  • Connection Tracking
  • SELinux Security Framework
  • SELinux Modes
  • SELinux Commands
  • Choosing an SELinux Policy
  • SELinux Booleans
  • SELinux Policy Tools
  • (X)INETD and Firewalls

Lab Tasks
  • User Private Groups
  • Using Filesystem ACLs
  • Securing xinetd Services
  • Enforcing Security Policy with xinetd
  • Securing Services with TCP Wrappers
  • Securing Services with Netfilter
  • Exploring SELinux Modes
  • SELinux File Contexts

10. Process Administration
  • at & cron Usage
  • Anacron
  • Viewing Processes
  • Managing Processes
  • Tuning Process Scheduling
  • Process Accounting
  • Setting Resource Limits via ulimit

Lab Tasks
  • Creating and Managing User Cron Jobs
  • Adding System cron Jobs


11. Networking
  • 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
  • Managing Network-Wide Time
  • Continual Time Sync with NTP
  • Configuring NTP Clients
  • Multiple IP Addresses
  • Enabling IPv6
  • Interface Bonding
  • Interface Bridging
  • 802.1q VLANS
  • Network Configuration Tools

Lab Tasks
  • Network Discovery
  • Basic Client Networking
  • NTP Client Configuration
  • Multiple IP Addresses Per Network Interface
  • Configuring IPv6
  • Troubleshooting Practice: Networking

12. Monitoring & Troubleshooting
  • System Status – Memory
  • System Status – I/O
  • System Status – CPU
  • Performance Trending with sar
  • Troubleshooting Basics: The Process
  • Troubleshooting Basics: The Tools
  • System Logging
  • Systemd Journal
  • Rsyslog
  • /etc/rsyslog.conf
  • Log Management
  • Log Anomaly Detector
  • strace and ltrace
  • Troubleshooting Incorrect File Permissions
  • Inability to Boot
  • Typos in Configuration Files
  • Corrupt Filesystems
  • RHEL7 Rescue Environment
  • Process Tools

Lab Tasks
  • Using the Systemd Journal
  • Setting up a Full Debug Logfile
  • Remote Syslog Configuration
  • Remote Rsyslog TLS Configuration
  • Recovering Damaged MBR


13. BIND DNS
  • The Domain Name Space
  • Delegation and Zones
  • Server Roles
  • Resolving Names
  • Resolving IP Addresses
  • Basic BIND Administration
  • Configuring the Resolver
  • Testing Resolution
  • rndc Key Configuration
  • named.conf Options Block
  • Creating a Site-Wide Cache
  • Zones In named.conf
  • Zone Database File Syntax
  • SOA Start of Authority
  • A, AAAA, & PTR Address & Pointer Records
  • NS Name Server
  • TXT, CNAME, & MX Text, Alias, & Mail Host
  • Abbreviations and Gotchas
  • $GENERATE, $ORIGIN, and $INCLUDE

Lab Tasks
  • Configuring a Slave Name Server
  • Use rndc to Control named
  • Configuring BIND Zone Files

14. OpenLDAP
  • OpenLDAP: Server Architecture
  • OpenLDAP: Backends
  • OpenLDAP: Replication
  • OpenLDAP: Configuration Options
  • OpenLDAP Server Tools
  • OpenLDAP Client Tools
  • LDIF: LDAP Data Interchange Format
  • Enabling LDAP-based Login
  • System Security Services Daemon (SSSD)

Lab Tasks
  • Building An OpenLDAP Server
  • Enabling TLS For An OpenLDAP Server
  • Enabling LDAP-based Logins

15. vsFTPd & Apache
  • vsftpd
  • Anonymous FTP with vsftpd
  • Configuring vsftpd
  • HTTP Operation
  • Apache Architecture
  • Apache Configuration Files
  • httpd.conf – Server Settings
  • httpd.conf – Main Configuration
  • httpd.conf – VirtualHost Configuration
  • Virtual Hosting DNS Implications
  • Adding Modules to Apache
  • Apache Logging
  • Delegating Administration
  • Directory Protection
  • Directory Protection with AllowOverride
  • Common Uses for .htaccess
  • TLS Using mod_ssl.so

Lab Tasks
  • Configuring vsftpd
  • Apache Architecture
  • Apache Content
  • Configuring Virtual Hosts
  • Using .htaccess Files
  • Using TLS Certificates with Apache

16. SQUID Proxy Server
  • Squid Overview
  • Squid File Layout
  • Squid Access Control Lists
  • Applying Squid ACLs
  • Tuning Squid & Configuring Cache Hierarchies
  • Bandwidth Metering
  • Monitoring Squid
  • Proxy Client Configuration

Lab Tasks
  • Installing and Configuring Squid
  • Squid Cache Manager CGI
  • Proxy Auto Configuration
  • Configure a Squid Proxy Cluster

17. Samba
  • Samba Daemons
  • Accessing Windows/Samba Shares from Linux
  • Samba Utilities
  • Samba Configuration Files
  • The smb.conf File
  • Mapping Permissions and ACLs
  • Mapping Linux Concepts
  • Sharing Home Directories
  • Sharing Printers
  • Share Authentication
  • User-Level Access
  • Mapping Users
  • Samba Account Database
  • User Share Restrictions

Lab Tasks
  • Samba Share-Level Access
  • Samba User-Level Access
  • Samba Group Shares
  • Handling Symbolic Links with Samba
  • Samba Home Directory Shares

18. Postfix
  • Postfix Features
  • Postfix Components
  • Postfix Configuration
  • master.cf
  • main.cf
  • Postfix Map Types
  • Postfix Pattern Matching
  • Virtual Domains
  • Postfix Mail Filtering
  • Configuration Commands
  • Management Commands
  • SMTP AUTH Server and Relay Control
  • SMTP AUTH Clients
  • TLS Server Configuration
  • Postfix Client Configuration for TLS
  • Lab Tasks
  • Configuring Postfix
  • Postfix Network Configuration
  • Postfix Virtual Host Configuration
  • Postfix SMTP AUTH Configuration
  • Postfix STARTTLS Configuration

19. Email Services
  • Procmail
  • SpamAssassin
  • amavisd-new Mail Filtering
  • Cyrus IMAP/POP3 Server
  • Cyrus IMAP MTA Integration
  • Cyrus Mailbox Administration
  • Lab Tasks
  • Configuring Procmail & SpamAssassin
  • Configuring Cyrus IMAP

20. 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

 

Prerequisites

Students should already be experienced Unix administrators. Fundamentals such as the Unix command line and how to edit files will not be covered in class. A good understanding of network concepts, the TCP/IP protocol suite, and basic Unix security is also assumed. The accelerated pace of this class makes it more difficult for unprepared students to keep up. Less experienced students are encouraged to instead take the GL120 ""Linux Fundamentals"", GL250 ""Enterprise Linux Systems Administration"" or GL275 ""Enterprise Linux Networking Services"".

 

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