System Administrator’s Guide
I. Basic System Configuration
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1. 1. Getting Started
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  1. 1.1. Basic Configuration of the Environment
    
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    1.1.1. Introduction to Configuring the Date and Time
    
    1.1.2. Introduction to Configuring the System Locale
    
    1.1.3. Introduction to Configuring the Keyboard Layout
  2. 1.2. Configuring and Inspecting Network Access
    
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    1.2.1. Configuring Network Access During the Installation Process
    
    1.2.2. Managing Network Connections After the Installation Process Using nmcli
    
    1.2.3. Managing Network Connections After the Installation Process Using nmtui
    
    1.2.4. Managing Networking in web console
  3. 1.3. The Basics of Registering the System and Managing Subscriptions
    
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    1.3.1. What Red Hat Subscriptions Are and Which Tasks They Can Be Used For
    
    1.3.2. Registering the System During the Installation
    
    1.3.3. Registering the System after the Installation
    
    1.3.4. Registering a System to EUS Content
    
    1.3.5. Registering a System to E4S Content
  4. 1.4. Installing Software
    
    Expand section "1.4. Installing Software" Collapse section "1.4. Installing Software"
    
    1.4.1. Prerequisites for Software Installation
    
    1.4.2. Introduction to the System of Software Packaging and Software Repositories
    
    1.4.3. Managing Basic Software Installation Tasks with Subscription Manager and Yum
  5. 1.5. Making systemd Services Start at Boot Time
    
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    1.5.1. Enabling or Disabling the Services
    
    1.5.2. Managing Services in web console
    
    1.5.3. Additional Resources on systemd Services
  6. 1.6. Enhancing System Security with a Firewall, SELinux and SSH Logings
    
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    1.6.1. Ensuring the Firewall Is Enabled and Running
    
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    1.6.1.1. What a Firewall Is and How It Enhances System Security
    
    1.6.1.2. Re-enabling the firewalld Service
    
    1.6.2. Ensuring the Appropriate State of SELinux
    
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    1.6.2.1. What SELinux Is and How It Enhances System Security
    
    1.6.2.2. Ensuring the Required State of SELinux
    
    1.6.2.3. Managing SELinux in web console
    
    1.6.3. Using SSH-based Authentication
    
    Expand section "1.6.3. Using SSH-based Authentication" Collapse section "1.6.3. Using SSH-based Authentication"
    
    1.6.3.1. What SSH-based Authentication Is and How It Enhances System Security
    
    1.6.3.2. Establishing an SSH Connection
    
    1.6.3.3. Disabling SSH Root Login
  7. 1.7. The Basics of Managing User Accounts
    
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    1.7.1. The Most Basic Command-Line Tools to Manage User Accounts and Groups
    
    1.7.2. Managing User Accounts in web console
  8. 1.8. Dumping the Crashed Kernel Using the kdump Mechanism
    
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    1.8.1. What kdump Is and Which Tasks It Can Be Used For
    
    1.8.2. Enabling and Activating kdump During the Installation Process
    
    1.8.3. Ensuring That kdump Is Installed and Enabled after the Installation Process
    
    1.8.4. Configuring kdump in web console
    
    1.8.5. Additional Resources on kdump
  9. 1.9. Performing System Rescue and Creating System Backup with ReaR
    
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    1.9.1. What ReaR Is and Which Tasks It Can Be Used For
    
    1.9.2. Quickstart to Installation and Configuration of ReaR
    
    1.9.3. Quickstart to Creation of the Rescue System with ReaR
    
    1.9.4. Quickstart to Configuration of ReaR with the Backup Software
  10. 1.10. Using the Log Files to Troubleshoot Problems
    
    Expand section "1.10. Using the Log Files to Troubleshoot Problems" Collapse section "1.10. Using the Log Files to Troubleshoot Problems"
    
    1.10.1. Services Handling the syslog Messages
    
    1.10.2. Subdirectories Storing the syslog Messages
  11. 1.11. Accessing Red Hat Support
    
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    1.11.1. Obtaining Red Hat Support Through Red Hat Customer Portal
    
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    1.11.1.1. What the Red Hat Support Tool Is and Which Tasks It Can Be Used For
    
    1.11.2. Using the SOS Report to Troubleshoot Problems
2. 2. System Locale and Keyboard Configuration
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  1. 2.1. Setting the System Locale
    
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    2.1.1. Displaying the Current Status
    
    2.1.2. Listing Available Locales
    
    2.1.3. Setting the Locale
    
    2.1.4. Making System Locale Settings Permanent when Installing with Kickstart
  2. 2.2. Changing the Keyboard Layout
    
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    2.2.1. Displaying the Current Settings
    
    2.2.2. Listing Available Keymaps
    
    2.2.3. Setting the Keymap
  3. 2.3. Additional Resources
3. 3. Configuring the Date and Time
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  1. 3.1. Using the timedatectl Command
    
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    3.1.1. Displaying the Current Date and Time
    
    3.1.2. Changing the Current Time
    
    3.1.3. Changing the Current Date
    
    3.1.4. Changing the Time Zone
    
    3.1.5. Synchronizing the System Clock with a Remote Server
  2. 3.2. Using the date Command
    
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    3.2.1. Displaying the Current Date and Time
    
    3.2.2. Changing the Current Time
    
    3.2.3. Changing the Current Date
  3. 3.3. Using the hwclock Command
    
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    3.3.1. Displaying the Current Date and Time
    
    3.3.2. Setting the Date and Time
    
    3.3.3. Synchronizing the Date and Time
  4. 3.4. Additional Resources
4. 4. Managing Users and Groups
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  1. 4.1. Introduction to Users and Groups
    
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    4.1.1. User Private Groups
    
    4.1.2. Shadow Passwords
  2. 4.2. Managing Users in a Graphical Environment
    
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    4.2.1. Using the Users Settings Tool
  3. 4.3. Using Command-Line Tools
    
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    4.3.1. Adding a New User
    
    4.3.2. Adding a New Group
    
    4.3.3. Adding an Existing User to an Existing Group
    
    4.3.4. Creating Group Directories
    
    4.3.5. Setting Default Permissions for New Files Using umask
    
    Expand section "4.3.5. Setting Default Permissions for New Files Using umask" Collapse section "4.3.5. Setting Default Permissions for New Files Using umask"
    
    4.3.5.1. Managing umask in Shells
  4. 4.4. Additional Resources
5. 5. Access Control Lists
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  1. 5.1. Mounting File Systems
    
    Expand section "5.1. Mounting File Systems" Collapse section "5.1. Mounting File Systems"
    
    5.1.1. NFS
  2. 5.2. Setting Access ACLs
  3. 5.3. Setting Default ACLs
  4. 5.4. Retrieving ACLs
  5. 5.5. Archiving File Systems With ACLs
  6. 5.6. Compatibility with Older Systems
  7. 5.7. ACL References
6. 6. Gaining Privileges
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II. Subscription and Support
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1. 7. Registering the System and Managing Subscriptions
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2. 8. Accessing Support Using the Red Hat Support Tool
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  1. 8.1. Installing the Red Hat Support Tool
  2. 8.2. Registering the Red Hat Support Tool Using the Command Line
  3. 8.3. Using the Red Hat Support Tool in Interactive Shell Mode
  4. 8.4. Configuring the Red Hat Support Tool
    
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    8.4.1. Saving Settings to the Configuration Files
  5. 8.5. Opening and Updating Support Cases Using Interactive Mode
  6. 8.6. Viewing Support Cases on the Command Line
  7. 8.7. Additional Resources
III. Installing and Managing Software
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1. 9. Yum
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  1. 9.1. Checking For and Updating Packages
    
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    9.1.1. Checking For Updates
    
    9.1.2. Updating Packages
    
    9.1.3. Upgrading the System Off-line with ISO and Yum
  2. 9.2. Working with Packages
    
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    9.2.1. Searching Packages
    
    9.2.2. Listing Packages
    
    9.2.3. Displaying Package Information
    
    9.2.4. Installing Packages
    
    9.2.5. Downloading Packages
    
    9.2.6. Removing Packages
  3. 9.3. Working with Package Groups
    
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    9.3.1. Listing Package Groups
    
    9.3.2. Installing a Package Group
    
    9.3.3. Removing a Package Group
  4. 9.4. Working with Transaction History
    
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    9.4.1. Listing Transactions
    
    9.4.2. Examining Transactions
    
    9.4.3. Reverting and Repeating Transactions
    
    9.4.4. Starting New Transaction History
  5. 9.5. Configuring Yum and Yum Repositories
    
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    9.5.1. Setting [main] Options
    
    9.5.2. Setting [repository] Options
    
    9.5.3. Using Yum Variables
    
    9.5.4. Viewing the Current Configuration
    
    9.5.5. Adding, Enabling, and Disabling a Yum Repository
    
    9.5.6. Creating a Yum Repository
    
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    9.5.6.1. Adding packages to an already created yum repository
    
    9.5.7. Adding the Optional and Supplementary Repositories
  6. 9.6. Yum Plug-ins
    
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    9.6.1. Enabling, Configuring, and Disabling Yum Plug-ins
    
    9.6.2. Installing Additional Yum Plug-ins
    
    9.6.3. Working with Yum Plug-ins
  7. 9.7. Automatically Refreshing Package Database and Downloading Updates with Yum-cron
    
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    9.7.1. Enabling Automatic Installation of Updates
    
    9.7.2. Setting up Optional Email Notifications
    
    9.7.3. Enabling or Disabling Specific Repositories
    
    9.7.4. Testing Yum-cron Settings
    
    9.7.5. Disabling Yum-cron messages
    
    9.7.6. Automatically Cleaning Packages
  8. 9.8. Additional Resources
IV. Infrastructure Services
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1. 10. Managing Services with systemd
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  1. 10.1. Introduction to systemd
    
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    10.1.1. Main Features
    
    10.1.2. Compatibility Changes
  2. 10.2. Managing System Services
    
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    10.2.1. Listing Services
    
    10.2.2. Displaying Service Status
    
    10.2.3. Starting a Service
    
    10.2.4. Stopping a Service
    
    10.2.5. Restarting a Service
    
    10.2.6. Enabling a Service
    
    10.2.7. Disabling a Service
    
    10.2.8. Starting a Conflicting Service
  3. 10.3. Working with systemd Targets
    
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    10.3.1. Viewing the Default Target
    
    10.3.2. Viewing the Current Target
    
    10.3.3. Changing the Default Target
    
    10.3.4. Changing the Current Target
    
    10.3.5. Changing to Rescue Mode
    
    10.3.6. Changing to Emergency Mode
  4. 10.4. Shutting Down, Suspending, and Hibernating the System
    
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    10.4.1. Shutting Down the System
    
    10.4.2. Restarting the System
    
    10.4.3. Suspending the System
    
    10.4.4. Hibernating the System
  5. 10.5. Controlling systemd on a Remote Machine
  6. 10.6. Creating and Modifying systemd Unit Files
    
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    10.6.1. Understanding the Unit File Structure
    
    10.6.2. Creating Custom Unit Files
    
    10.6.3. Converting SysV Init Scripts to Unit Files
    
    10.6.4. Modifying Existing Unit Files
    
    10.6.5. Working with Instantiated Units
  7. 10.7. Additional Considerations While Managing Services
  8. 10.8. Additional Resources
2. 11. Configuring a System for Accessibility
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3. 12. OpenSSH
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  1. 12.1. The SSH Protocol
    
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    12.1.1. Why Use SSH?
    
    12.1.2. Main Features
    
    12.1.3. Protocol Versions
    
    12.1.4. Event Sequence of an SSH Connection
    
    Expand section "12.1.4. Event Sequence of an SSH Connection" Collapse section "12.1.4. Event Sequence of an SSH Connection"
    
    12.1.4.1. Transport Layer
    
    12.1.4.2. Authentication
    
    12.1.4.3. Channels
  2. 12.2. Configuring OpenSSH
    
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    12.2.1. Configuration Files
    
    12.2.2. Starting an OpenSSH Server
    
    12.2.3. Requiring SSH for Remote Connections
    
    12.2.4. Using Key-based Authentication
    
    Expand section "12.2.4. Using Key-based Authentication" Collapse section "12.2.4. Using Key-based Authentication"
    
    12.2.4.1. Generating Key Pairs
    
    12.2.4.2. Configuring ssh-agent
  3. 12.3. OpenSSH Clients
    
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    12.3.1. Using the ssh Utility
    
    12.3.2. Using the scp Utility
    
    12.3.3. Using the sftp Utility
  4. 12.4. More Than a Secure Shell
    
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    12.4.1. X11 Forwarding
    
    12.4.2. Port Forwarding
  5. 12.5. Additional Resources
4. 13. TigerVNC
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  1. 13.1. VNC Server
    
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    13.1.1. Installing VNC Server
    
    13.1.2. Configuring VNC Server
    
    Expand section "13.1.2. Configuring VNC Server" Collapse section "13.1.2. Configuring VNC Server"
    
    13.1.2.1. Configuring VNC Server for Two Users
    
    13.1.3. Starting VNC Server
    
    Expand section "13.1.3. Starting VNC Server" Collapse section "13.1.3. Starting VNC Server"
    
    13.1.3.1. Configuring VNC Server for Two Users and Two Different Displays
    
    13.1.4. VNC setup based on xinetd with XDMCP for GDM
    
    13.1.5. Terminating a VNC Session
  2. 13.2. Sharing an Existing Desktop
  3. 13.3. VNC Viewer
    
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    13.3.1. Installing VNC Viewer
    
    13.3.2. Connecting to VNC Server
    
    Expand section "13.3.2. Connecting to VNC Server" Collapse section "13.3.2. Connecting to VNC Server"
    
    13.3.2.1. Configuring the Firewall for VNC
    
    13.3.3. Connecting to VNC Server Using SSH
  4. 13.4. Additional Resources
V. Servers
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1. 14. Web Servers
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  1. 14.1. The Apache HTTP Server
    
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    14.1.1. Notable Changes
    
    14.1.2. Updating the Configuration
    
    14.1.3. Running the httpd Service
    
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    14.1.3.1. Starting the Service
    
    14.1.3.2. Stopping the Service
    
    14.1.3.3. Restarting the Service
    
    14.1.3.4. Verifying the Service Status
    
    14.1.4. Editing the Configuration Files
    
    14.1.5. Working with Modules
    
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    14.1.5.1. Loading a Module
    
    14.1.5.2. Writing a Module
    
    14.1.6. Setting Up Virtual Hosts
    
    14.1.7. Setting Up an SSL Server
    
    Expand section "14.1.7. Setting Up an SSL Server" Collapse section "14.1.7. Setting Up an SSL Server"
    
    14.1.7.1. An Overview of Certificates and Security
    
    14.1.8. Enabling the mod_ssl Module
    
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    14.1.8.1. Enabling and Disabling SSL and TLS in mod_ssl
    
    14.1.9. Enabling the mod_nss Module
    
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    14.1.9.1. Enabling and Disabling SSL and TLS in mod_nss
    
    14.1.10. Using an Existing Key and Certificate
    
    14.1.11. Generating a New Key and Certificate
    
    14.1.12. Configure the Firewall for HTTP and HTTPS Using the Command Line
    
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    14.1.12.1. Checking Network Access for Incoming HTTPS and HTTPS Using the Command Line
    
    14.1.13. Additional Resources
2. 15. Mail Servers
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  1. 15.1. Email Protocols
    
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    15.1.1. Mail Transport Protocols
    
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    15.1.1.1. SMTP
    
    15.1.2. Mail Access Protocols
    
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    15.1.2.1. POP
    
    15.1.2.2. IMAP
    
    15.1.2.3. Dovecot
  2. 15.2. Email Program Classifications
    
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    15.2.1. Mail Transport Agent
    
    15.2.2. Mail Delivery Agent
    
    15.2.3. Mail User Agent
  3. 15.3. Mail Transport Agents
    
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    15.3.1. Postfix
    
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    15.3.1.1. The Default Postfix Installation
    
    15.3.1.2. Upgrading From a Previous Release
    
    15.3.1.3. Basic Postfix Configuration
    
    15.3.1.4. Using Postfix with LDAP
    
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    15.3.1.4.1. The /etc/aliases lookup example
    
    15.3.2. Sendmail
    
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    15.3.2.1. Purpose and Limitations
    
    15.3.2.2. The Default Sendmail Installation
    
    15.3.2.3. Common Sendmail Configuration Changes
    
    15.3.2.4. Masquerading
    
    15.3.2.5. Stopping Spam
    
    15.3.2.6. Using Sendmail with LDAP
    
    15.3.3. Fetchmail
    
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    15.3.3.1. Fetchmail Configuration Options
    
    15.3.3.2. Global Options
    
    15.3.3.3. Server Options
    
    15.3.3.4. User Options
    
    15.3.3.5. Fetchmail Command Options
    
    15.3.3.6. Informational or Debugging Options
    
    15.3.3.7. Special Options
    
    15.3.4. Mail Transport Agent (MTA) Configuration
  4. 15.4. Mail Delivery Agents
    
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    15.4.1. Procmail Configuration
    
    15.4.2. Procmail Recipes
    
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    15.4.2.1. Delivering vs. Non-Delivering Recipes
    
    15.4.2.2. Flags
    
    15.4.2.3. Specifying a Local Lockfile
    
    15.4.2.4. Special Conditions and Actions
    
    15.4.2.5. Recipe Examples
    
    15.4.2.6. Spam Filters
  5. 15.5. Mail User Agents
    
    Expand section "15.5. Mail User Agents" Collapse section "15.5. Mail User Agents"
    
    15.5.1. Securing Communication
    
    Expand section "15.5.1. Securing Communication" Collapse section "15.5.1. Securing Communication"
    
    15.5.1.1. Secure Email Clients
    
    15.5.1.2. Securing Email Client Communications
  6. 15.6. Configuring Mail Server with Antispam and Antivirus
    
    Expand section "15.6. Configuring Mail Server with Antispam and Antivirus" Collapse section "15.6. Configuring Mail Server with Antispam and Antivirus"
    
    15.6.1. Configuring Spam Filtering for Mail Transport Agent or Mail Delivery Agent
    
    Expand section "15.6.1. Configuring Spam Filtering for Mail Transport Agent or Mail Delivery Agent" Collapse section "15.6.1. Configuring Spam Filtering for Mail Transport Agent or Mail Delivery Agent"
    
    15.6.1.1. Configuring Spam Filtering in a Mail Transport Agent
    
    15.6.1.2. Configuring Spam Filtering in a Mail Delivery Agent
    
    15.6.2. Configuring Antivirus Protection
    
    15.6.3. Using the EPEL Repository to install Antispam and Antivirus Software
  7. 15.7. Additional Resources
    
    Expand section "15.7. Additional Resources" Collapse section "15.7. Additional Resources"
    
    15.7.1. Installed Documentation
    
    15.7.2. Online Documentation
    
    15.7.3. Related Books
3. 16. File and Print Servers
  Expand section "16. File and Print Servers" Collapse section "16. File and Print Servers"
  1. 16.1. Samba
    
    Expand section "16.1. Samba" Collapse section "16.1. Samba"
    
    16.1.1. The Samba Services
    
    16.1.2. Verifying the smb.conf File by Using the testparm Utility
    
    16.1.3. Understanding the Samba Security Modes
    
    16.1.4. Setting up Samba as a Standalone Server
    
    Expand section "16.1.4. Setting up Samba as a Standalone Server" Collapse section "16.1.4. Setting up Samba as a Standalone Server"
    
    16.1.4.1. Setting up the Server Configuration for the Standalone Server
    
    16.1.4.2. Creating and Enabling Local User Accounts
    
    16.1.5. Setting up Samba as a Domain Member
    
    Expand section "16.1.5. Setting up Samba as a Domain Member" Collapse section "16.1.5. Setting up Samba as a Domain Member"
    
    16.1.5.1. Joining a Domain
    
    16.1.5.2. Verifying That Samba Was Correctly Joined As a Domain Member
    
    16.1.5.3. Understanding ID Mapping
    
    Expand section "16.1.5.3. Understanding ID Mapping" Collapse section "16.1.5.3. Understanding ID Mapping"
    
    16.1.5.3.1. Planning ID Ranges
    
    16.1.5.3.2. The * Default Domain
    
    16.1.5.4. The Different ID Mapping Back Ends
    
    Expand section "16.1.5.4. The Different ID Mapping Back Ends" Collapse section "16.1.5.4. The Different ID Mapping Back Ends"
    
    16.1.5.4.1. Using the tdb ID Mapping Back End
    
    16.1.5.4.2. Using the ad ID Mapping Back End
    
    16.1.5.4.3. Using the rid ID Mapping Back End
    
    16.1.5.4.4. Using the autorid ID Mapping Back End
    
    16.1.6. Configuring File Shares on a Samba Server
    
    Expand section "16.1.6. Configuring File Shares on a Samba Server" Collapse section "16.1.6. Configuring File Shares on a Samba Server"
    
    16.1.6.1. Setting up a Share That Uses POSIX ACLs
    
    Expand section "16.1.6.1. Setting up a Share That Uses POSIX ACLs" Collapse section "16.1.6.1. Setting up a Share That Uses POSIX ACLs"
    
    16.1.6.1.1. Adding a Share That Uses POSIX ACLs
    
    16.1.6.1.2. Setting ACLs
    
    16.1.6.1.3. Setting Permissions on a Share
    
    16.1.6.2. Setting up a Share That Uses Windows ACLs
    
    Expand section "16.1.6.2. Setting up a Share That Uses Windows ACLs" Collapse section "16.1.6.2. Setting up a Share That Uses Windows ACLs"
    
    16.1.6.2.1. Granting the SeDiskOperatorPrivilege Privilege
    
    16.1.6.2.2. Enabling Windows ACL Support
    
    16.1.6.2.3. Adding a Share That Uses Windows ACLs
    
    16.1.6.2.4. Managing Share Permissions and File System ACLs of a Share That Uses Windows ACLs
    
    16.1.6.3. Managing ACLs on an SMB Share Using smbcacls
    
    Expand section "16.1.6.3. Managing ACLs on an SMB Share Using smbcacls" Collapse section "16.1.6.3. Managing ACLs on an SMB Share Using smbcacls"
    
    16.1.6.3.1. Understanding Access Control Entries
    
    16.1.6.3.2. Displaying ACLs Using smbcacls
    
    16.1.6.3.3. Calculating an ACE Mask
    
    16.1.6.3.4. Adding, Updating, And Removing an ACL Using smbcacls
    
    16.1.6.4. Enabling Users to Share Directories on a Samba Server
    
    Expand section "16.1.6.4. Enabling Users to Share Directories on a Samba Server" Collapse section "16.1.6.4. Enabling Users to Share Directories on a Samba Server"
    
    16.1.6.4.1. Enabling the User Shares Feature
    
    16.1.6.4.2. Adding a User Share
    
    16.1.6.4.3. Updating Settings of a User Share
    
    16.1.6.4.4. Displaying Information About Existing User Shares
    
    16.1.6.4.5. Listing User Shares
    
    16.1.6.4.6. Deleting a User Share
    
    16.1.6.5. Enabling Guest Access to a Share
    
    16.1.7. Setting up a Samba Print Server
    
    Expand section "16.1.7. Setting up a Samba Print Server" Collapse section "16.1.7. Setting up a Samba Print Server"
    
    16.1.7.1. The Samba spoolssd Service
    
    16.1.7.2. Enabling Print Server Support in Samba
    
    16.1.7.3. Manually Sharing Specific Printers
    
    16.1.7.4. Setting up Automatic Printer Driver Downloads for Windows Clients
    
    Expand section "16.1.7.4. Setting up Automatic Printer Driver Downloads for Windows Clients" Collapse section "16.1.7.4. Setting up Automatic Printer Driver Downloads for Windows Clients"
    
    16.1.7.4.1. Basic Information about Printer Drivers
    
    16.1.7.4.2. Enabling Users to Upload and Preconfigure Drivers
    
    16.1.7.4.3. Setting up the print$ Share
    
    16.1.7.4.4. Creating a GPO to Enable Clients to Trust the Samba Print Server
    
    16.1.7.4.5. Uploading Drivers and Preconfiguring Printers
    
    16.1.8. Tuning the Performance of a Samba Server
    
    Expand section "16.1.8. Tuning the Performance of a Samba Server" Collapse section "16.1.8. Tuning the Performance of a Samba Server"
    
    16.1.8.1. Setting the SMB Protocol Version
    
    16.1.8.2. Tuning Shares with Directories That Contain a Large Number of Files
    
    16.1.8.3. Settings That Can Have a Negative Performance Impact
    
    16.1.9. Frequently Used Samba Command-line Utilities
    
    Expand section "16.1.9. Frequently Used Samba Command-line Utilities" Collapse section "16.1.9. Frequently Used Samba Command-line Utilities"
    
    16.1.9.1. Using the net Utility
    
    Expand section "16.1.9.1. Using the net Utility" Collapse section "16.1.9.1. Using the net Utility"
    
    16.1.9.1.1. Using the net ads join and net rpc join Commands
    
    16.1.9.1.2. Using the net rpc rights Command
    
    16.1.9.1.3. Using the net rpc share Command
    
    16.1.9.1.4. Using the net user Command
    
    16.1.9.1.5. Using the net usershare Command
    
    16.1.9.2. Using the rpcclient Utility
    
    16.1.9.3. Using the samba-regedit Application
    
    16.1.9.4. Using the smbcacls Utility
    
    16.1.9.5. Using the smbclient Utility
    
    Expand section "16.1.9.5. Using the smbclient Utility" Collapse section "16.1.9.5. Using the smbclient Utility"
    
    16.1.9.5.1. Using smbclient in Interactive Mode
    
    16.1.9.5.2. Using smbclient in Scripting Mode
    
    16.1.9.6. Using the smbcontrol Utility
    
    16.1.9.7. Using the smbpasswd Utility
    
    16.1.9.8. Using the smbstatus Utility
    
    16.1.9.9. Using the smbtar Utility
    
    16.1.9.10. Using the testparm Utility
    
    16.1.9.11. Using the wbinfo Utility
    
    16.1.10. Additional Resources
  2. 16.2. FTP
    
    Expand section "16.2. FTP" Collapse section "16.2. FTP"
    
    16.2.1. The File Transfer Protocol
    
    16.2.2. The vsftpd Server
    
    Expand section "16.2.2. The vsftpd Server" Collapse section "16.2.2. The vsftpd Server"
    
    16.2.2.1. Starting and Stopping vsftpd
    
    16.2.2.2. Starting Multiple Copies of vsftpd
    
    16.2.2.3. Encrypting vsftpd Connections Using TLS
    
    16.2.2.4. SELinux Policy for vsftpd
    
    16.2.3. Additional Resources
    
    Expand section "16.2.3. Additional Resources" Collapse section "16.2.3. Additional Resources"
    
    16.2.3.1. Installed Documentation
    
    16.2.3.2. Online Documentation
  3. 16.3. Print Settings
    
    Expand section "16.3. Print Settings" Collapse section "16.3. Print Settings"
    
    16.3.1. Starting the Print Settings Configuration Tool
    
    16.3.2. Starting Printer Setup
    
    16.3.3. Adding a Local Printer
    
    16.3.4. Adding an AppSocket/HP JetDirect printer
    
    16.3.5. Adding an IPP Printer
    
    16.3.6. Adding an LPD/LPR Host or Printer
    
    16.3.7. Adding a Samba (SMB) printer
    
    16.3.8. Selecting the Printer Model and Finishing
    
    16.3.9. Printing a Test Page
    
    16.3.10. Modifying Existing Printers
    
    Expand section "16.3.10. Modifying Existing Printers" Collapse section "16.3.10. Modifying Existing Printers"
    
    16.3.10.1. The Settings Page
    
    16.3.10.2. The Policies Page
    
    Expand section "16.3.10.2. The Policies Page" Collapse section "16.3.10.2. The Policies Page"
    
    16.3.10.2.1. Sharing Printers
    
    16.3.10.2.2. The Access Control Page
    
    16.3.10.2.3. The Printer Options Page
    
    16.3.10.2.4. Job Options Page
    
    16.3.10.2.5. Ink/Toner Levels Page
    
    16.3.10.3. Managing Print Jobs
    
    16.3.11. Additional Resources
4. 17. Database Servers
  Expand section "17. Database Servers" Collapse section "17. Database Servers"
  1. 17.1. MariaDB
    
    Expand section "17.1. MariaDB" Collapse section "17.1. MariaDB"
    
    17.1.1. Installing the MariaDB server
    
    Expand section "17.1.1. Installing the MariaDB server" Collapse section "17.1.1. Installing the MariaDB server"
    
    17.1.1.1. Improving MariaDB installation security
    
    17.1.2. Configuring the MariaDB server for networking
    
    17.1.3. Backing up MariaDB data
    
    Expand section "17.1.3. Backing up MariaDB data" Collapse section "17.1.3. Backing up MariaDB data"
    
    17.1.3.1. Logical back up
    
    17.1.3.2. Physical back up
5. 18. Configuring NTP Using the chrony Suite
  Expand section "18. Configuring NTP Using the chrony Suite" Collapse section "18. Configuring NTP Using the chrony Suite"
  1. 18.1. Introduction to the chrony Suite
    
    Expand section "18.1. Introduction to the chrony Suite" Collapse section "18.1. Introduction to the chrony Suite"
    
    18.1.1. Differences Between ntpd and chronyd
    
    18.1.2. Choosing Between NTP Daemons
  2. 18.2. Understanding chrony and Its Configuration
    
    Expand section "18.2. Understanding chrony and Its Configuration" Collapse section "18.2. Understanding chrony and Its Configuration"
    
    18.2.1. Understanding chronyd and chronyc
    
    18.2.2. Understanding the chrony Configuration Commands
    
    18.2.3. Security with chronyc
  3. 18.3. Using chrony
    
    Expand section "18.3. Using chrony" Collapse section "18.3. Using chrony"
    
    18.3.1. Installing chrony
    
    18.3.2. Checking the Status of chronyd
    
    18.3.3. Starting chronyd
    
    18.3.4. Stopping chronyd
    
    18.3.5. Checking if chrony is Synchronized
    
    Expand section "18.3.5. Checking if chrony is Synchronized" Collapse section "18.3.5. Checking if chrony is Synchronized"
    
    18.3.5.1. Checking chrony Tracking
    
    18.3.5.2. Checking chrony Sources
    
    18.3.5.3. Checking chrony Source Statistics
    
    18.3.6. Manually Adjusting the System Clock
  4. 18.4. Setting Up chrony for Different Environments
    
    Expand section "18.4. Setting Up chrony for Different Environments" Collapse section "18.4. Setting Up chrony for Different Environments"
    
    18.4.1. Setting Up chrony for a System in an Isolated Network
  5. 18.5. Using chronyc
    
    Expand section "18.5. Using chronyc" Collapse section "18.5. Using chronyc"
    
    18.5.1. Using chronyc to Control chronyd
  6. 18.6. Chrony with HW timestamping
    
    Expand section "18.6. Chrony with HW timestamping" Collapse section "18.6. Chrony with HW timestamping"
    
    18.6.1. Understanding Hardware Timestamping
    
    18.6.2. Verifying Support for Hardware Timestamping
    
    18.6.3. Enabling Hardware Timestamping
    
    18.6.4. Configuring Client Polling Interval
    
    18.6.5. Enabling Interleaved Mode
    
    18.6.6. Configuring Server for Large Number of Clients
    
    18.6.7. Verifying Hardware Timestamping
    
    18.6.8. Configuring PTP-NTP bridge
  7. 18.7. Additional Resources
    
    Expand section "18.7. Additional Resources" Collapse section "18.7. Additional Resources"
    
    18.7.1. Installed Documentation
    
    18.7.2. Online Documentation
6. 19. Configuring NTP Using ntpd
  Expand section "19. Configuring NTP Using ntpd" Collapse section "19. Configuring NTP Using ntpd"
  1. 19.1. Introduction to NTP
  2. 19.2. NTP Strata
  3. 19.3. Understanding NTP
  4. 19.4. Understanding the Drift File
  5. 19.5. UTC, Timezones, and DST
  6. 19.6. Authentication Options for NTP
  7. 19.7. Managing the Time on Virtual Machines
  8. 19.8. Understanding Leap Seconds
  9. 19.9. Understanding the ntpd Configuration File
  10. 19.10. Understanding the ntpd Sysconfig File
  11. 19.11. Disabling chrony
  12. 19.12. Checking if the NTP Daemon is Installed
  13. 19.13. Installing the NTP Daemon (ntpd)
  14. 19.14. Checking the Status of NTP
  15. 19.15. Configure the Firewall to Allow Incoming NTP Packets
    
    Expand section "19.15. Configure the Firewall to Allow Incoming NTP Packets" Collapse section "19.15. Configure the Firewall to Allow Incoming NTP Packets"
    
    19.15.1. Change the Firewall Settings
    
    19.15.2. Open Ports in the Firewall for NTP Packets
  16. 19.16. Configure ntpdate Servers
  17. 19.17. Configure NTP
    
    Expand section "19.17. Configure NTP" Collapse section "19.17. Configure NTP"
    
    19.17.1. Configure Access Control to an NTP Service
    
    19.17.2. Configure Rate Limiting Access to an NTP Service
    
    19.17.3. Adding a Peer Address
    
    19.17.4. Adding a Server Address
    
    19.17.5. Adding a Broadcast or Multicast Server Address
    
    19.17.6. Adding a Manycast Client Address
    
    19.17.7. Adding a Broadcast Client Address
    
    19.17.8. Adding a Manycast Server Address
    
    19.17.9. Adding a Multicast Client Address
    
    19.17.10. Configuring the Burst Option
    
    19.17.11. Configuring the iburst Option
    
    19.17.12. Configuring Symmetric Authentication Using a Key
    
    19.17.13. Configuring the Poll Interval
    
    19.17.14. Configuring Server Preference
    
    19.17.15. Configuring the Time-to-Live for NTP Packets
    
    19.17.16. Configuring the NTP Version to Use
  18. 19.18. Configuring the Hardware Clock Update
  19. 19.19. Configuring Clock Sources
  20. 19.20. Additional Resources
    
    Expand section "19.20. Additional Resources" Collapse section "19.20. Additional Resources"
    
    19.20.1. Installed Documentation
    
    19.20.2. Useful Websites
7. 20. Configuring PTP Using ptp4l
  Expand section "20. Configuring PTP Using ptp4l" Collapse section "20. Configuring PTP Using ptp4l"
  1. 20.1. Introduction to PTP
    
    Expand section "20.1. Introduction to PTP" Collapse section "20.1. Introduction to PTP"
    
    20.1.1. Understanding PTP
    
    20.1.2. Advantages of PTP
  2. 20.2. Using PTP
    
    Expand section "20.2. Using PTP" Collapse section "20.2. Using PTP"
    
    20.2.1. Checking for Driver and Hardware Support
    
    20.2.2. Installing PTP
    
    20.2.3. Starting ptp4l
    
    Expand section "20.2.3. Starting ptp4l" Collapse section "20.2.3. Starting ptp4l"
    
    20.2.3.1. Selecting a Delay Measurement Mechanism
  3. 20.3. Using PTP with Multiple Interfaces
  4. 20.4. Specifying a Configuration File
  5. 20.5. Using the PTP Management Client
  6. 20.6. Synchronizing the Clocks
  7. 20.7. Verifying Time Synchronization
  8. 20.8. Serving PTP Time with NTP
  9. 20.9. Serving NTP Time with PTP
  10. 20.10. Synchronize to PTP or NTP Time Using timemaster
    
    Expand section "20.10. Synchronize to PTP or NTP Time Using timemaster" Collapse section "20.10. Synchronize to PTP or NTP Time Using timemaster"
    
    20.10.1. Starting timemaster as a Service
    
    20.10.2. Understanding the timemaster Configuration File
    
    20.10.3. Configuring timemaster Options
  11. 20.11. Improving Accuracy
  12. 20.12. Additional Resources
    
    Expand section "20.12. Additional Resources" Collapse section "20.12. Additional Resources"
    
    20.12.1. Installed Documentation
    
    20.12.2. Useful Websites
VI. Monitoring and Automation
Expand section "VI. Monitoring and Automation" Collapse section "VI. Monitoring and Automation"
1. 21. System Monitoring Tools
  Expand section "21. System Monitoring Tools" Collapse section "21. System Monitoring Tools"
  1. 21.1. Viewing System Processes
    
    Expand section "21.1. Viewing System Processes" Collapse section "21.1. Viewing System Processes"
    
    21.1.1. Using the ps Command
    
    21.1.2. Using the top Command
    
    21.1.3. Using the System Monitor Tool
  2. 21.2. Viewing Memory Usage
    
    Expand section "21.2. Viewing Memory Usage" Collapse section "21.2. Viewing Memory Usage"
    
    21.2.1. Using the free Command
    
    21.2.2. Using the System Monitor Tool
  3. 21.3. Viewing CPU Usage
    
    Expand section "21.3. Viewing CPU Usage" Collapse section "21.3. Viewing CPU Usage"
    
    21.3.1. Using the System Monitor Tool
  4. 21.4. Viewing Block Devices and File Systems
    
    Expand section "21.4. Viewing Block Devices and File Systems" Collapse section "21.4. Viewing Block Devices and File Systems"
    
    21.4.1. Using the lsblk Command
    
    21.4.2. Using the blkid Command
    
    21.4.3. Using the findmnt Command
    
    21.4.4. Using the df Command
    
    21.4.5. Using the du Command
    
    21.4.6. Using the System Monitor Tool
  5. 21.5. Viewing Hardware Information
    
    Expand section "21.5. Viewing Hardware Information" Collapse section "21.5. Viewing Hardware Information"
    
    21.5.1. Using the lspci Command
    
    21.5.2. Using the lsusb Command
    
    21.5.3. Using the lscpu Command
  6. 21.6. Checking for Hardware Errors
  7. 21.7. Monitoring Performance with Net-SNMP
    
    Expand section "21.7. Monitoring Performance with Net-SNMP" Collapse section "21.7. Monitoring Performance with Net-SNMP"
    
    21.7.1. Installing Net-SNMP
    
    21.7.2. Running the Net-SNMP Daemon
    
    Expand section "21.7.2. Running the Net-SNMP Daemon" Collapse section "21.7.2. Running the Net-SNMP Daemon"
    
    21.7.2.1. Starting the Service
    
    21.7.2.2. Stopping the Service
    
    21.7.2.3. Restarting the Service
    
    21.7.3. Configuring Net-SNMP
    
    Expand section "21.7.3. Configuring Net-SNMP" Collapse section "21.7.3. Configuring Net-SNMP"
    
    21.7.3.1. Setting System Information
    
    21.7.3.2. Configuring Authentication
    
    21.7.4. Retrieving Performance Data over SNMP
    
    Expand section "21.7.4. Retrieving Performance Data over SNMP" Collapse section "21.7.4. Retrieving Performance Data over SNMP"
    
    21.7.4.1. Hardware Configuration
    
    21.7.4.2. CPU and Memory Information
    
    21.7.4.3. File System and Disk Information
    
    21.7.4.4. Network Information
    
    21.7.5. Extending Net-SNMP
    
    Expand section "21.7.5. Extending Net-SNMP" Collapse section "21.7.5. Extending Net-SNMP"
    
    21.7.5.1. Extending Net-SNMP with Shell Scripts
    
    21.7.5.2. Extending Net-SNMP with Perl
  8. 21.8. Additional Resources
    
    Expand section "21.8. Additional Resources" Collapse section "21.8. Additional Resources"
    
    21.8.1. Installed Documentation
2. 22. OpenLMI
  Expand section "22. OpenLMI" Collapse section "22. OpenLMI"
  1. 22.1. About OpenLMI
    
    Expand section "22.1. About OpenLMI" Collapse section "22.1. About OpenLMI"
    
    22.1.1. Main Features
    
    22.1.2. Management Capabilities
  2. 22.2. Installing OpenLMI
    
    Expand section "22.2. Installing OpenLMI" Collapse section "22.2. Installing OpenLMI"
    
    22.2.1. Installing OpenLMI on a Managed System
    
    22.2.2. Installing OpenLMI on a Client System
  3. 22.3. Configuring SSL Certificates for OpenPegasus
    
    Expand section "22.3. Configuring SSL Certificates for OpenPegasus" Collapse section "22.3. Configuring SSL Certificates for OpenPegasus"
    
    22.3.1. Managing Self-signed Certificates
    
    22.3.2. Managing Authority-signed Certificates with Identity Management (Recommended)
    
    22.3.3. Managing Authority-signed Certificates Manually
  4. 22.4. Using LMIShell
    
    Expand section "22.4. Using LMIShell" Collapse section "22.4. Using LMIShell"
    
    22.4.1. Starting, Using, and Exiting LMIShell
    
    22.4.2. Connecting to a CIMOM
    
    22.4.3. Working with Namespaces
    
    22.4.4. Working with Classes
    
    22.4.5. Working with Instances
    
    22.4.6. Working with Instance Names
    
    22.4.7. Working with Associated Objects
    
    22.4.8. Working with Association Objects
    
    22.4.9. Working with Indications
    
    22.4.10. Example Usage
  5. 22.5. Using OpenLMI Scripts
  6. 22.6. Additional Resources
3. 23. Viewing and Managing Log Files
  Expand section "23. Viewing and Managing Log Files" Collapse section "23. Viewing and Managing Log Files"
  1. 23.1. Locating Log Files
  2. 23.2. Basic Configuration of Rsyslog
    
    Expand section "23.2. Basic Configuration of Rsyslog" Collapse section "23.2. Basic Configuration of Rsyslog"
    
    23.2.1. Filters
    
    23.2.2. Actions
    
    23.2.3. Templates
    
    23.2.4. Global Directives
    
    23.2.5. Log Rotation
    
    23.2.6. Increasing the Limit of Open Files
  3. 23.3. Using the New Configuration Format
    
    Expand section "23.3. Using the New Configuration Format" Collapse section "23.3. Using the New Configuration Format"
    
    23.3.1. Rulesets
    
    23.3.2. Compatibility with sysklogd
  4. 23.4. Working with Queues in Rsyslog
    
    Expand section "23.4. Working with Queues in Rsyslog" Collapse section "23.4. Working with Queues in Rsyslog"
    
    23.4.1. Defining Queues
    
    23.4.2. Creating a New Directory for rsyslog Log Files
    
    23.4.3. Managing Queues
    
    23.4.4. Using the New Syntax for rsyslog queues
  5. 23.5. Configuring rsyslog on a Logging Server
    
    Expand section "23.5. Configuring rsyslog on a Logging Server" Collapse section "23.5. Configuring rsyslog on a Logging Server"
    
    23.5.1. Using The New Template Syntax on a Logging Server
  6. 23.6. Using Rsyslog Modules
    
    Expand section "23.6. Using Rsyslog Modules" Collapse section "23.6. Using Rsyslog Modules"
    
    23.6.1. Importing Text Files
    
    23.6.2. Exporting Messages to a Database
    
    23.6.3. Enabling Encrypted Transport
    
    23.6.4. Using RELP
  7. 23.7. Interaction of Rsyslog and Journal
  8. 23.8. Structured Logging with Rsyslog
    
    Expand section "23.8. Structured Logging with Rsyslog" Collapse section "23.8. Structured Logging with Rsyslog"
    
    23.8.1. Importing Data from Journal
    
    23.8.2. Filtering Structured Messages
    
    23.8.3. Parsing JSON
    
    23.8.4. Storing Messages in the MongoDB
  9. 23.9. Debugging Rsyslog
  10. 23.10. Using the Journal
    
    Expand section "23.10. Using the Journal" Collapse section "23.10. Using the Journal"
    
    23.10.1. Viewing Log Files
    
    23.10.2. Access Control
    
    23.10.3. Using The Live View
    
    23.10.4. Filtering Messages
    
    23.10.5. Enabling Persistent Storage
  11. 23.11. Managing Log Files in a Graphical Environment
    
    Expand section "23.11. Managing Log Files in a Graphical Environment" Collapse section "23.11. Managing Log Files in a Graphical Environment"
    
    23.11.1. Viewing Log Files
    
    23.11.2. Adding a Log File
    
    23.11.3. Monitoring Log Files
  12. 23.12. Additional Resources
4. 24. Automating System Tasks
  Expand section "24. Automating System Tasks" Collapse section "24. Automating System Tasks"
  1. 24.1. Scheduling a Recurring Job Using Cron
    
    Expand section "24.1. Scheduling a Recurring Job Using Cron" Collapse section "24.1. Scheduling a Recurring Job Using Cron"
    
    24.1.1. Prerequisites for Cron Jobs
    
    24.1.2. Scheduling a Cron Job
  2. 24.2. Scheduling a Recurring Asynchronous Job Using Anacron
    
    Expand section "24.2. Scheduling a Recurring Asynchronous Job Using Anacron" Collapse section "24.2. Scheduling a Recurring Asynchronous Job Using Anacron"
    
    24.2.1. Prerequisites for Anacrob Jobs
    
    24.2.2. Scheduling an Anacron Job
  3. 24.3. Scheduling a Job to Run at a Specific Time Using at
    
    Expand section "24.3. Scheduling a Job to Run at a Specific Time Using at" Collapse section "24.3. Scheduling a Job to Run at a Specific Time Using at"
    
    24.3.1. Prerequisites for At Jobs
    
    24.3.2. Scheduling an At Job
    
    Expand section "24.3.2. Scheduling an At Job" Collapse section "24.3.2. Scheduling an At Job"
    
    24.3.2.1. Controlling Access to At and Batch
  4. 24.4. Scheduling a Job to Run on System Load Drop Using batch
    
    Expand section "24.4. Scheduling a Job to Run on System Load Drop Using batch" Collapse section "24.4. Scheduling a Job to Run on System Load Drop Using batch"
    
    24.4.1. Prerequisites for Batch Jobs
    
    24.4.2. Scheduling a Batch Job
  5. 24.5. Scheduling a Job to Run on Next Boot Using a systemd Unit File
  6. 24.6. Additional Resources
5. 25. Automatic Bug Reporting Tool (ABRT)
  Expand section "25. Automatic Bug Reporting Tool (ABRT)" Collapse section "25. Automatic Bug Reporting Tool (ABRT)"
  1. 25.1. Introduction to ABRT
  2. 25.2. Installing ABRT and Starting its Services
    
    Expand section "25.2. Installing ABRT and Starting its Services" Collapse section "25.2. Installing ABRT and Starting its Services"
    
    25.2.1. Installing the ABRT GUI
    
    25.2.2. Installing ABRT for the Command Line
    
    25.2.3. Installing Supplementary ABRT Tools
    
    25.2.4. Starting the ABRT Services
    
    25.2.5. Testing ABRT Crash Detection
  3. 25.3. Configuring ABRT
    
    Expand section "25.3. Configuring ABRT" Collapse section "25.3. Configuring ABRT"
    
    25.3.1. Configuring Events
    
    25.3.2. Creating Custom Events
    
    25.3.3. Setting Up Automatic Reporting
  4. 25.4. Detecting Software Problems
    
    Expand section "25.4. Detecting Software Problems" Collapse section "25.4. Detecting Software Problems"
    
    25.4.1. Detecting C and C++ Crashes
    
    25.4.2. Detecting Python Exceptions
    
    25.4.3. Detecting Ruby Exceptions
    
    25.4.4. Detecting Java Exceptions
    
    25.4.5. Detecting X.Org Crashes
    
    25.4.6. Detecting Kernel Oopses and Panics
  5. 25.5. Handling Detected Problems
    
    Expand section "25.5. Handling Detected Problems" Collapse section "25.5. Handling Detected Problems"
    
    25.5.1. Using the Command Line Tool
    
    25.5.2. Using the GUI
  6. 25.6. Additional Resources
VII. Kernel Customization with Bootloader
Expand section "VII. Kernel Customization with Bootloader" Collapse section "VII. Kernel Customization with Bootloader"
1. 26. Working with GRUB 2
  Expand section "26. Working with GRUB 2" Collapse section "26. Working with GRUB 2"
  1. 26.1. Introduction to GRUB 2
  2. 26.2. Configuring GRUB 2
  3. 26.3. Making Temporary Changes to a GRUB 2 Menu
  4. 26.4. Making Persistent Changes to a GRUB 2 Menu Using the grubby Tool
  5. 26.5. Customizing the GRUB 2 Configuration File
    
    Expand section "26.5. Customizing the GRUB 2 Configuration File" Collapse section "26.5. Customizing the GRUB 2 Configuration File"
    
    26.5.1. Changing the Default Boot Entry
    
    26.5.2. Editing a Menu Entry
    
    26.5.3. Adding a new Entry
    
    26.5.4. Creating a Custom Menu
  6. 26.6. Protecting GRUB 2 with a Password
  7. 26.7. Reinstalling GRUB 2
    
    Expand section "26.7. Reinstalling GRUB 2" Collapse section "26.7. Reinstalling GRUB 2"
    
    26.7.1. Reinstalling GRUB 2 on BIOS-Based Machines
    
    26.7.2. Reinstalling GRUB 2 on UEFI-Based Machines
    
    26.7.3. Resetting and Reinstalling GRUB 2
  8. 26.8. Upgrading from GRUB Legacy to GRUB 2
  9. 26.9. GRUB 2 over a Serial Console
    
    Expand section "26.9. GRUB 2 over a Serial Console" Collapse section "26.9. GRUB 2 over a Serial Console"
    
    26.9.1. Configuring GRUB 2 for a single boot
    
    26.9.2. Configuring GRUB 2 for a persistent change
    
    26.9.3. Configuring a new GRUB 2 file
    
    26.9.4. Using screen to Connect to the Serial Console
  10. 26.10. Terminal Menu Editing During Boot
    
    Expand section "26.10. Terminal Menu Editing During Boot" Collapse section "26.10. Terminal Menu Editing During Boot"
    
    26.10.1. Booting to Rescue Mode
    
    26.10.2. Booting to Emergency Mode
    
    26.10.3. Booting to the Debug Shell
    
    26.10.4. Changing and Resetting the Root Password
  11. 26.11. Unified Extensible Firmware Interface (UEFI) Secure Boot
    
    Expand section "26.11. Unified Extensible Firmware Interface (UEFI) Secure Boot" Collapse section "26.11. Unified Extensible Firmware Interface (UEFI) Secure Boot"
    
    26.11.1. UEFI Secure Boot Support in Red Hat Enterprise Linux 7
  12. 26.12. Additional Resources
VIII. System Backup and Recovery
Expand section "VIII. System Backup and Recovery" Collapse section "VIII. System Backup and Recovery"
1. 27. Relax-and-Recover (ReaR)
  Expand section "27. Relax-and-Recover (ReaR)" Collapse section "27. Relax-and-Recover (ReaR)"
  1. 27.1. Basic ReaR Usage
    
    Expand section "27.1. Basic ReaR Usage" Collapse section "27.1. Basic ReaR Usage"
    
    27.1.1. Installing ReaR
    
    27.1.2. Configuring ReaR
    
    27.1.3. Creating a Rescue System
    
    27.1.4. Scheduling ReaR
    
    27.1.5. Performing a System Rescue
  2. 27.2. Integrating ReaR with Backup Software
    
    Expand section "27.2. Integrating ReaR with Backup Software" Collapse section "27.2. Integrating ReaR with Backup Software"
    
    27.2.1. The Built-in Backup Method
    
    Expand section "27.2.1. The Built-in Backup Method" Collapse section "27.2.1. The Built-in Backup Method"
    
    27.2.1.1. Configuring the Internal Backup Method
    
    27.2.1.2. Creating a Backup Using the Internal Backup Method
    
    27.2.2. Supported Backup Methods
    
    27.2.3. Unsupported Backup Methods
    
    27.2.4. Creating Multiple Backups
2. 28. Choosing Suitable Red Hat Product
3. 29. Red Hat Customer Portal Labs Relevant to System Administration
4. 30. Revision History
  Expand section "30. Revision History" Collapse section "30. Revision History"
  1. 30.1. Acknowledgments

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Part VII. Kernel Customization with Bootloader

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