GL972 - Custom Linux Systems Administration | Courses

GL972 - Custom Linux Systems Administration

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A custom course from the GL120, GL250, and GL275 courses

Prerequisites:

None

Supported Distributions:

Red Hat Enterprise Linux 6

Course Outline:

What is Linux?
1. Unix and its Design Principles
2. FSF and GNU
3. GPL - General Public License
4. The Linux Kernel
5. Linux Kernel and Versioning
6. Components of a Distribution
7. Red Hat Linux Products
8. Oracle Linux
Login and Exploration
1. Logging In
2. Running Programs
3. Interacting with Command Line
4. The X Window System
5. Starting X
6. Gathering Login Session Info
7. Gathering System Info
8. got root?
9. Switching User Contexts
10. sudo
11. Help from Commands and Documentation
12. Getting Help with man & info
Lab Tasks
1. Login and Discovery
2. Help with Commands
3. Switching Users With su
The Linux Filesystem
1. Filesystem Support
2. Unix/Linux Filesystem Features
3. Filesystem Hierarchy Standard
4. Navigating the Filesystem
5. Displaying Directory Contents
6. Filesystem Structures
7. Determining Disk Usage With df and du
8. Determining Disk Usage With baobab
9. Disk Usage with Quotas
10. File Ownership
11. Default Group Ownership
12. File and Directory Permissions
13. File Creation Permissions with umask
14. Changing File Permissions
15. SUID and SGID on files
16. SGID and Sticky Bit on Directories
17. User Private Group Scheme
Lab Tasks
1. Navigating Directories and Listing Files
2. Disk and Filesystem Usage
3. File and Directory Ownership and Permissions
Manipulating Files
1. Directory Manipulation
2. File Manipulation
3. Deleting and Creating Files
4. Physical Unix File Structure
5. Filesystem Links
6. File Extensions and Content
7. Displaying Files
8. Previewing Files
9. Displaying Binary Files
10. Searching the Filesystem
11. Alternate Search Method
12. Producing File Statistics
Lab Tasks
1. Manipulating Files and Directories
2. File Examination & Search Commands
Shell Basics
1. Role of Command Shell
2. Communication Channels
3. File Redirection
4. Piping Commands Together
5. Filename Matching
6. File Globbing and Wildcard Patterns
7. Brace Expansion
8. Shell and Environment Variables
9. Key Environment Variables
10. General Quoting Rules
11. Nesting Commands
12. Multiple and Multi-line Commands
Lab Tasks
1. Connecting Commands
2. Wildcard File Matching
3. Shell Variables
4. Shell Meta-Characters
5. Command Substitution
Archiving and Compression
1. Archives with tar
2. Archives with cpio
3. The gzip Compression Utility
4. The bzip2 Compression Utility
5. The XZ Compression Utility
6. The PKZIP Archiving/Compression format
Lab Tasks
1. Archiving and Compression
Text Processing
1. Searching Inside Files
2. The Streaming Editor
3. Replacing Text Characters
4. Text Sorting
5. Duplicate Removal Utility
6. Extracting Columns of Text
7. Combining Files and Merging Text
8. Comparing File Changes
Lab Tasks
1. Text Processing
Regular Expressions
1. Regular Expression Overview
2. Regular Expressions
3. RE Character Classes
4. RE Quantifiers
5. RE Parenthesis
Lab Tasks
1. Pattern Matching with Regular Expressions
2. Extended Regular Expressions
3. Using Regular Expressions With sed
Editing with Vim
1. Text Editing
2. vi and Vim
3. Learning vi
4. Basic vi
5. Intermediate vi
Lab Tasks
1. Text Editing with Vim
Emacs
1. Emacs
2. The Emacs Interface
3. Basic Emacs
4. More Emacs Commands
Lab Tasks
1. Text Editing with Emacs
Command Shells
1. Shells
2. Identifying the Shell
3. Changing the Shell
4. Bourne sh: Configuration Files
5. Script Execution
6. Bourne sh: Prompts
7. bash: Bourne-Again Shell
8. bash: Configuration Files
9. bash: Command Line History
10. bash: Command Editing
11. bash: Command Completion
12. bash: "shortcuts"
13. bash: prompt
14. Setting Resource Limits via ulimit
Lab Tasks
1. Linux Shells
2. Bash History
3. Aliases
4. Bash Login Scripts
5. The Z Shell
Introduction to Shell Scripting
1. Shell Script Strengths and Weaknesses
2. Example Shell Script
3. Positional Parameters
4. Input & Output
5. Doing Math
6. Comparisons with test
7. Exit Status
8. Conditional Statements
9. Flow Control: case
10. The for Loop
11. The while and until Loops
Lab Tasks
1. Writing a Shell Script
Process Management and Job Control
1. What is a Process?
2. Process Lifecycle
3. Process States
4. Viewing Processes
5. Signals
6. Tools to Send Signals
7. Job Control Overview
8. Job Control Commands
9. Persistent Shell Sessions with Screen
10. Using screen
11. Advanced Screen
Lab Tasks
1. Job Control Basics
2. Process Management and Job Control Basics
3. Screen Basics
4. Using Screen Regions
Process Administration
1. Automating Tasks
2. at/batch
3. cron
4. The crontab Command
5. crontab Format
6. /etc/cron.*/ Directories
7. Anacron
8. Managing Processes
9. Tuning Process Scheduling
Lab Tasks
1. Creating and Managing User Cron Jobs
2. Adding System cron Jobs
Downloading with FTP
1. Downloading with FTP
2. FTP
3. lftp
4. Command Line Internet - Non-interactive
5. Command Line Internet - Interactive
Lab Tasks
1. Command Line File Transfers
The Secure Shell (SSH)
1. Secure Shell
2. ssh and sshd Configuration
3. Accessing Remote Shells
4. Transferring Files
5. Alternative sftp Clients
6. SSH Key Management
7. ssh-agent
Lab Tasks
1. Introduction to ssh and scp
2. SSH Key-based User Authentication
3. Using ssh-agent
Mounting Filesystems & Managing Removable Media
1. Filesystems Concept Review
2. Mounting Filesystems
3. Filesystem Table (/etc/fstab)
4. AutoFS
5. Removable Media
Lab Tasks
1. On-demand filesystem mounting with AutoFS
The X Window System
1. The X Window System
2. X Modularity
3. X.Org Drivers
4. Configuring X Manually
5. Automatic X Configuration
6. The X11 Protocol and Display Names
7. Display Managers and Graphical Login
8. Starting X Apps Automatically
9. X Access Control
10. Remote X Access (historical/insecure approach)
11. Remote X Access (modern/secure approach)
12. XDMCP
13. Remote Graphical Access With VNC and RDP
14. Specialized X Servers
Lab Tasks
1. Remote X with XDMCP
2. Configure X Security
3. Configure a VNC Server
4. Launching X Apps Automatically
5. Secure X
Linux Hardware Discovery, Interaction, and Control
1. Hardware Discovery Tools
2. Hardware and System Clock
3. Console
4. Virtual Terminals
5. Serial Ports
6. SCSI Devices
7. USB Devices
8. USB Configuration
9. Managing Optical Media
10. Tape Libraries
11. Managing Linux Device Files
12. Kernel Hardware Info - /sys/
13. /sys/ Structure
14. udev
15. Kernel Modules
16. Configuring Kernel Components and Modules
17. Handling Module Dependencies
18. Configuring the Kernel via /proc/
Lab Tasks
1. Adjusting Kernel Options
2. Introduction to Troubleshooting Labs
3. Troubleshooting Practice: Kernel Modules
Boot Process and SysV Init
1. Booting Linux on PCs
2. GRUB Configuration
3. Boot Parameters
4. Initial ramdisk
5. /sbin/init
6. System Init Styles
7. Linux Runlevels
8. /etc/inittab
9. /etc/rc.d/rc.sysinit
10. Runlevel Implementation
11. System Configuration Files
12. RHEL6 Configuration Utilities
13. Typical SysV Init Script
14. The /etc/rc.local File
15. Managing Daemons
16. Controlling Service Startup
17. Shutdown and Reboot
Lab Tasks
1. Boot Process
2. GRUB Command Line
3. Basic GRUB Security
4. Managing Services With chkconfig
5. Troubleshooting Practice: Boot Process
Software Maintenance
1. Managing Software
2. RPM Features
3. RPM Architecture
4. RPM Package Files
5. Working With RPMs
6. Querying and Verifying with rpm
7. Compiling/Installing from Source
8. Manually Installed Shared Libraries
9. Installing Source RPM Packages
Lab Tasks
1. Managing Software with RPM
2. Querying the RPM Database
3. Installing Software via RPM & Source and Rebuilding SRPMs
Filesystem Administration
1. Partitioning Disks with fdisk
2. Partitioning Disks with parted
3. Filesystem Creation
4. Mounting Filesystems
5. Filesystem Maintenance
6. Persistent Block Devices
7. Resizing Filesystems
8. Swap
9. Filesystem Structures
10. Determining Disk Usage With df and du
11. Configuring Disk Quotas
12. Setting Quotas
13. Viewing and Monitoring Quotas
14. Filesystem Attributes
15. Backup Software
16. Backup Examples
Lab Tasks
1. Creating and Managing Filesystems
2. Hot Adding Swap
3. Setting User Quotas
4. Using rsync and ssh for Backups
5. Using tar and cpio for Backups
6. Using dump and restore for Backups
7. Creating ISO Images for Backups
LVM & RAID
1. Logical Volume Management
2. Implementing LVM
3. Creating Logical Volumes
4. Manipulating VGs & LVs
5. Advanced LVM Concepts
6. system-config-lvm
7. RAID Concepts
8. Array Creation with mdadm
9. Software RAID Monitoring
10. Software RAID Control and Display
Lab Tasks
1. Creating and Managing LVM Volumes
2. Creating and Managing a RAID-5 Array
User/Group Administration
1. User and Group Concepts
2. User Administration
3. Modifying Accounts
4. Group Administration
5. Password Aging
6. Default User Files
7. Controlling Logins
8. Manual DS Client Configuration
9. system-config-authentication
10. System Security Services Daemon (SSSD)
Lab Tasks
1. User and Group Administration
2. Using LDAP for Centralized User Accounts
3. Troubleshooting Practice: Account Management
4. Using NIS for Centralized User Accounts
Pluggable Authentication Modules (PAM)
1. PAM Overview
2. PAM Module Types
3. PAM Order of Processing
4. PAM Control Statements
5. PAM Modules
6. pam_unix
7. pam_nologin.so
8. pam_limits.so
9. pam_wheel.so
10. pam_xauth.so
Lab Tasks
1. Restricting superuser access to wheel group membership
2. Using pam_nologin to Restrict Logins
3. Setting Limits with the pam_limits Modules
4. Using pam_limits to Restrict Simultaneous Logins
Security Administration
1. Security Concepts
2. Tightening Default Security
3. Security Advisories
4. File Access Control Lists
5. Manipulating FACLs
6. Viewing FACLs
7. Backing Up FACLs
8. File Creation Permissions with umask
9. User Private Group Scheme
10. Alternatives to UPG
Lab Tasks
1. User Private Groups
2. Using Filesystem ACLs
Basic Networking
1. IPv4 Fundamentals
2. TCP/UDP Fundamentals
3. Linux Network Interfaces
4. Ethernet Hardware Tools
5. Network Configuration with ip Command
6. Configuring Routing Tables
7. IP to MAC Address Mapping with ARP
8. Starting and Stopping Interfaces
9. NetworkManager
10. DNS Clients
11. DHCP Clients
12. system-config-network-{tui,cmd}
13. Network Diagnostics
14. Information from netstat and ss
15. Managing Network-Wide Time
16. Continual Time Sync with NTP
17. Configuring NTP Clients
18. Useful NTP Commands
Lab Tasks
1. Network Discovery
2. Basic Client Networking
3. NTP Client Configuration
Advanced Networking
1. Multiple IP Addresses
2. Configuring a DHCP server
3. Enabling IPv6
4. Interface Bonding
5. Interface Bridging
6. 802.1q VLANS
7. Tuning Kernel Network Settings
Lab Tasks
1. Multiple IP Addresses Per Network Interface
2. Configuring IPv6
3. Troubleshooting Practice: Networking
Log File Administration
1. System Logging
2. Rsyslog
3. /etc/rsyslog.conf
4. Log Management
5. Log Anomaly Detector
Lab Tasks
1. Setting up a Full Debug Logfile
2. Remote Syslog Configuration
Monitoring & Troubleshooting
1. System Status - Memory
2. System Status - I/O
3. System Status - CPU
4. Performance Trending with sar
5. Process Accounting
6. Troubleshooting Basics: The Process
7. Troubleshooting Basics: The Tools
8. strace and ltrace
9. Common Problems
10. Troubleshooting Incorrect File Permissions
11. Inability to Boot
12. Typos in Configuration Files
13. Corrupt Filesystems
14. RHEL6 Rescue Environment
Lab Tasks
1. Recovering Damaged MBR
2. Using BSD Process Accounting
Securing Services
1. Xinetd
2. Xinetd Connection Limiting and Access Control
3. Xinetd: Resource limits, redirection, logging
4. TCP Wrappers
5. The /etc/hosts.allow & /etc/hosts.deny Files
6. /etc/hosts.{allow,deny} Shortcuts
7. Advanced TCP Wrappers
8. Basic Firewall Activation
9. Netfilter: Stateful Packet Filter Firewall
10. Netfilter Concepts
11. Using the iptables Command
12. Netfilter Rule Syntax
13. Targets
14. Common match_specs
15. Connection Tracking
Lab Tasks
1. Securing xinetd Services
2. Enforcing Security Policy with xinetd
3. Securing Services with TCP Wrappers
4. Securing Services with Netfilter
5. Troubleshooting Practice
DNS Concepts
1. Naming Services
2. DNS - A Better Way
3. The Domain Name Space
4. Delegation and Zones
5. Server Roles
6. Resolving Names
7. Resolving IP Addresses
8. Basic BIND Administration
9. Configuring the Resolver
10. Testing Resolution
Lab Tasks
1. Configuring a Slave Name Server
Configuring BIND
1. BIND Configuration Files
2. named.conf Syntax
3. named.conf Options Block
4. Creating a Site-Wide Cache
5. rndc Key Configuration
6. Zones In named.conf
7. Zone Database File Syntax
8. SOA - Start of Authority
9. A & PTR - Address & Pointer Records
10. NS - Name Server
11. CNAME & MX - Alias & Mail Host
12. Abbreviations and Gotchas
13. $GENERATE, $ORIGIN, and $INCLUDE
Lab Tasks
1. Use rndc to Control named
2. Configuring BIND Zone Files
Creating DNS Hierarchies
1. Subdomains and Delegation
2. Subdomains
3. Delegating Zones
4. in-addr.arpa. Delegation
5. Issues with in-addr.arpa.
6. RFC2317 & in-addr.arpa.
Lab Tasks
1. Create a Subdomain in an Existing Domain
2. Subdomain Delegation
Advanced BIND DNS Features
1. Address Match Lists & ACLs
2. Split Namespace with Views
3. Restricting Queries
4. Restricting Zone Transfers
5. Running BIND in a chroot jail
6. Dynamic DNS Concepts
7. Allowing Dynamic DNS Updates
8. DDNS Administration with nsupdate
9. Common Problems
10. Common Problems
11. Securing DNS With TSIG
Lab Tasks
1. Configuring Dynamic DNS
2. Securing BIND DNS
LDAP Concepts and Clients
1. LDAP: History and Uses
2. LDAP: Data Model Basics
3. LDAP: Protocol Basics
4. LDAP: Applications
5. LDAP: Search Filters
6. LDIF: LDAP Data Interchange Format
7. OpenLDAP Client Tools
8. Alternative LDAP Tools
Lab Tasks
1. Querying LDAP
OpenLDAP Servers
1. Popular LDAP Server Implementations
2. OpenLDAP: Server Architecture
3. OpenLDAP: Backends
4. OpenLDAP: Replication
5. OpenLDAP: Configuration Options
6. OpenLDAP: Configuration Sections
7. OpenLDAP: Global Parameters
8. OpenLDAP: Database Parameters
9. OpenLDAP Server Tools
10. Enabling LDAP-based Login
11. System Security Services Daemon (SSSD)
Lab Tasks
1. Building An OpenLDAP Server
2. Enabling TLS For An OpenLDAP Server
3. Enabling LDAP-based Logins
Implementing an FTP Server
1. The FTP Protocol
2. Active Mode FTP
3. Passive Mode FTP
4. ProFTPD
5. Pure-FTPd
6. vsftpd
7. Configuring vsftpd
8. Anonymous FTP with vsftpd
Lab Tasks
1. Configuring vsftpd

Pre-Installation Considerations
1. Pre-Installation Considerations
2. Hardware Compatibility
3. Multi-OS Booting
4. Partition Considerations
5. Filesystem Planning
6. Selecting a Filesystem
Installing RHEL6
1. Anaconda: An Overview
2. Anaconda: Booting the System
3. Anaconda: Common Boot Options
4. Anaconda: Loading Anaconda and Packages
5. Anaconda: Storage Options
6. Anaconda: Troubleshooting
7. FirstBoot
8. Kickstart
9. A Typical Install
Lab Tasks
1. Linux Installation
2. Automating Installation with Kickstart
Manage Virtual Machines
1. Introducing libvirt
2. libvirt: Basic Concepts
3. libvirt: Storage Architecture
4. libvirt: Network Architecture
5. libvirt: Graphical Tools
6. libvirt: Command Line Tools
7. virsh: Basics
8. virsh: Common Tasks
9. virt-install
10. libguestfs and guestfish
Lab Tasks
1. Installing a Virtual Machine