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SUSE Linux Enterprise Desktop 15 SP1

Administration Guide

Covers system administration tasks like maintaining, monitoring and customizing an initially installed system.

Publication Date: October 23, 2020
About This Guide
Available Documentation
Giving Feedback
Documentation Conventions
Product Life Cycle and Support
I Common Tasks
1 Bash and Bash Scripts
1.1 What is The Shell?
1.2 Writing Shell Scripts
1.3 Redirecting Command Events
1.4 Using Aliases
1.5 Using Variables in Bash
1.6 Grouping and Combining Commands
1.7 Working with Common Flow Constructs
1.8 For More Information
2 sudo
2.1 Basic sudo Usage
2.2 Configuring sudo
2.3 Common Use Cases
2.4 More Information
3 YaST Online Update
3.1 The Online Update Dialog
3.2 Installing Patches
3.3 Automatic Online Update
4 YaST
4.1 Advanced Key Combinations
5 YaST in Text Mode
5.1 Navigation in Modules
5.2 Advanced Key Combinations
5.3 Restriction of Key Combinations
5.4 YaST Command Line Options
6 Managing Software with Command Line Tools
6.1 Using Zypper
6.2 RPM—the Package Manager
7 System Recovery and Snapshot Management with Snapper
7.1 Default Setup
7.2 Using Snapper to Undo Changes
7.3 System Rollback by Booting from Snapshots
7.4 Enabling Snapper in User Home Directories
7.5 Creating and Modifying Snapper Configurations
7.6 Manually Creating and Managing Snapshots
7.7 Automatic Snapshot Clean-Up
7.8 Showing Exclusive Disk Space Used by Snapshots
7.9 Frequently Asked Questions
8 Live Kernel Patching with KLP
8.1 Advantages of Kernel Live Patching
8.2 Low-level Function of Kernel Live Patching
8.3 Activation of SLE Live Patching
8.4 Installing and Removing Patches
8.5 The klp Tool
8.6 Stuck Kernel Execution Threads
8.7 Patch Lifecycle
8.8 Scope of Kernel Live Patching Technology
8.9 Scope of SLE Live Patching
8.10 Interaction with the Support Processes
9 Transactional Updates
9.1 Limitations of Technical Preview
9.2 Enabling transactional-update
9.3 Managing Automatic Updates
9.4 The transactional-update Command
9.5 Troubleshooting
10 Remote Graphical Sessions with VNC
10.1 The vncviewer Client
10.2 Remmina: the Remote Desktop Client
10.3 Configuring One-time Sessions on the VNC Server
10.4 Configuring Persistent VNC Server Sessions
10.5 Configuring Encryption on the VNC Server
11 File Copying with RSync
11.1 Conceptual Overview
11.2 Basic Syntax
11.3 Copying Files and Directories Locally
11.4 Copying Files and Directories Remotely
11.5 Configuring and Using an Rsync Server
11.6 For More Information
II Booting a Linux System
12 Introduction to the Boot Process
12.1 Terminology
12.2 The Linux Boot Process
13 UEFI (Unified Extensible Firmware Interface)
13.1 Secure Boot
13.2 For More Information
14 The Boot Loader GRUB 2
14.1 Main Differences between GRUB Legacy and GRUB 2
14.2 Configuration File Structure
14.3 Configuring the Boot Loader with YaST
14.4 Helpful GRUB 2 Commands
14.5 More Information
15 The systemd Daemon
15.1 The systemd Concept
15.2 Basic Usage
15.3 System Start and Target Management
15.4 Managing Services with YaST
15.5 Customization of systemd
15.6 Advanced Usage
15.7 More Information
III System
16 32-Bit and 64-Bit Applications in a 64-Bit System Environment
16.1 Runtime Support
16.2 Kernel Specifications
17 journalctl: Query the systemd Journal
17.1 Making the Journal Persistent
17.2 journalctl Useful Switches
17.3 Filtering the Journal Output
17.4 Investigating systemd Errors
17.5 Journald Configuration
17.6 Using YaST to Filter the systemd Journal
17.7 Viewing Logs in GNOME
18 update-alternatives: Managing Multiple Versions of Commands and Files
18.1 Overview
18.2 Use Cases
18.3 Getting an Overview of Alternatives
18.4 Viewing Details on Specific Alternatives
18.5 Setting the Default Version of Alternatives
18.6 Installing Custom Alternatives
18.7 Defining Dependent Alternatives
19 Basic Networking
19.1 IP Addresses and Routing
19.2 IPv6—The Next Generation Internet
19.3 Name Resolution
19.4 Configuring a Network Connection with YaST
19.5 NetworkManager
19.6 Configuring a Network Connection Manually
19.7 Setting Up Bonding Devices
19.8 Setting Up Team Devices for Network Teaming
20 Printer Operation
20.1 The CUPS Workflow
20.2 Methods and Protocols for Connecting Printers
20.3 Installing the Software
20.4 Network Printers
20.5 Configuring CUPS with Command Line Tools
20.6 Printing from the Command Line
20.7 Special Features in SUSE Linux Enterprise Desktop
20.8 Troubleshooting
21 Graphical User Interface
21.1 X Window System
21.2 Installing and Configuring Fonts
21.3 GNOME Configuration for Administrators
21.4 Switching Between Intel and NVIDIA Optimus GPUs with SUSE Prime
22 Accessing File Systems with FUSE
22.1 Configuring FUSE
22.2 Mounting an NTFS Partition
22.3 For More Information
23 Managing Kernel Modules
23.1 Listing Loaded Modules with lsmod and modinfo
23.2 Adding and Removing Kernel Modules
24 Dynamic Kernel Device Management with udev
24.1 The /dev Directory
24.2 Kernel uevents and udev
24.3 Drivers, Kernel Modules and Devices
24.4 Booting and Initial Device Setup
24.5 Monitoring the Running udev Daemon
24.6 Influencing Kernel Device Event Handling with udev Rules
24.7 Persistent Device Naming
24.8 Files used by udev
24.9 For More Information
25 Special System Features
25.1 Information about Special Software Packages
25.2 Virtual Consoles
25.3 Keyboard Mapping
25.4 Language and Country-Specific Settings
26 Using NetworkManager
26.1 Use Cases for NetworkManager
26.2 Enabling or Disabling NetworkManager
26.3 Configuring Network Connections
26.4 NetworkManager and Security
26.5 Frequently Asked Questions
26.6 Troubleshooting
26.7 For More Information
27 Power Management
27.1 Power Saving Functions
27.2 Advanced Configuration and Power Interface (ACPI)
27.3 Rest for the Hard Disk
27.4 Troubleshooting
28 VM Guest
28.1 Adding and Removing CPUs
29 Persistent Memory
29.1 Introduction
29.2 Terms
29.3 Use Cases
29.4 Tools for Managing Persistent Memory
29.5 Setting Up Persistent Memory
29.6 For More Information
IV Services
30 Service Management with YaST
31 Time Synchronization with NTP
31.1 Configuring an NTP Client with YaST
31.2 Manually Configuring NTP in the Network
31.3 Configure chronyd at Runtime Using chronyc
31.4 Dynamic Time Synchronization at Runtime
31.5 Setting Up a Local Reference Clock
31.6 Clock Synchronization to an External Time Reference (ETR)
32 Sharing File Systems with NFS
32.1 Overview
32.2 Installing NFS Server
32.3 Configuring Clients
32.4 For More Information
33 Samba
33.1 Terminology
33.2 Installing a Samba Server
33.3 Configuring Clients
33.4 Samba as Login Server
33.5 Advanced Topics
33.6 For More Information
34 On-Demand Mounting with Autofs
34.1 Installation
34.2 Configuration
34.3 Operation and Debugging
34.4 Auto-Mounting an NFS Share
34.5 Advanced Topics
V Troubleshooting
35 Help and Documentation
35.1 Documentation Directory
35.2 Man Pages
35.3 Info Pages
35.4 Online Resources
36 Gathering System Information for Support
36.1 Displaying Current System Information
36.2 Collecting System Information with Supportconfig
36.3 Submitting Information to Global Technical Support
36.4 Analyzing System Information
36.5 Gathering Information during the Installation
36.6 Support of Kernel Modules
36.7 For More Information
37 Common Problems and Their Solutions
37.1 Finding and Gathering Information
37.2 Boot Problems
37.3 Login Problems
37.4 Network Problems
37.5 Data Problems
A An Example Network
B GNU Licenses
B.1 GNU Free Documentation License

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