SUSE Linux Enterprise Server 15 SP1
Administration Guide
Covers system administration tasks like maintaining, monitoring and customizing an initially installed system.
Publication Date:
July 01, 2022
- About This Guide
- I Common Tasks
- 1 Bash and Bash Scripts
- 2 sudo
- 3 YaST Online Update
- 4 YaST
- 5 YaST in Text Mode
- 6 Managing Software with Command Line Tools
- 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
- 9 Transactional Updates
- 10 Remote Graphical Sessions with VNC
- 11 File Copying with RSync
- II Booting a Linux System
- III System
- 16 32-Bit and 64-Bit Applications in a 64-Bit System Environment
- 17
journalctl: Query thesystemdJournal - 18
update-alternatives: Managing Multiple Versions of Commands and Files - 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 Configuring a Network Connection Manually
- 19.6 Basic Router Setup
- 19.7 Setting Up Bonding Devices
- 19.8 Setting Up Team Devices for Network Teaming
- 19.9 Software-Defined Networking with Open vSwitch
- 20 Printer Operation
- 21 Graphical User Interface
- 22 Accessing File Systems with FUSE
- 23 Managing Kernel Modules
- 24 Dynamic Kernel Device Management with
udev- 24.1 The
/devDirectory - 24.2 Kernel
ueventsandudev - 24.3 Drivers, Kernel Modules and Devices
- 24.4 Booting and Initial Device Setup
- 24.5 Monitoring the Running
udevDaemon - 24.6 Influencing Kernel Device Event Handling with
udevRules - 24.7 Persistent Device Naming
- 24.8 Files used by
udev - 24.9 For More Information
- 24.1 The
- 25 Special System Features
- 26 Using NetworkManager
- 27 Power Management
- 28 VM Guest
- 29 Persistent Memory
- IV Services
- 30 Service Management with YaST
- 31 Time Synchronization with NTP
- 32 The Domain Name System
- 33 DHCP
- 34 Sharing File Systems with NFS
- 35 Samba
- 36 On-Demand Mounting with Autofs
- 37 SLP
- 38 The Apache HTTP Server
- 38.1 Quick Start
- 38.2 Configuring Apache
- 38.3 Starting and Stopping Apache
- 38.4 Installing, Activating, and Configuring Modules
- 38.5 Enabling CGI Scripts
- 38.6 Setting Up a Secure Web Server with SSL
- 38.7 Running Multiple Apache Instances on the Same Server
- 38.8 Avoiding Security Problems
- 38.9 Troubleshooting
- 38.10 For More Information
- 39 Setting Up an FTP Server with YaST
- 40 Squid Caching Proxy Server
- 40.1 Some Facts about Proxy Servers
- 40.2 System Requirements
- 40.3 Basic Usage of Squid
- 40.4 The YaST Squid Module
- 40.5 The Squid Configuration File
- 40.6 Configuring a Transparent Proxy
- 40.7 Using the Squid Cache Manager CGI Interface (
cachemgr.cgi) - 40.8 Cache Report Generation with Calamaris
- 40.9 For More Information
- 41 Web Based Enterprise Management Using SFCB
- V Troubleshooting
- A An Example Network
- B GNU Licenses
List of Figures
- 3.1 YaST Online Update
- 3.2 Viewing retracted patches and history
- 3.3 YaST Online Update Configuration
- 5.1 Main Window of YaST in Text Mode
- 5.2 The Software Installation Module
- 7.1 Boot Loader: Snapshots
- 10.1 vncviewer
- 10.2 Remmina's Main Window
- 10.3 Remote Desktop Preference
- 10.4 Quick-starting
- 10.5 Remmina Viewing Remote Session
- 10.6 Reading Path to the Profile File
- 10.7 Remote Administration
- 10.8 VNC Session Settings
- 10.9 Joining a Persistent VNC Session
- 13.1 Secure Boot Support
- 13.2 UEFI: Secure Boot Process
- 14.1 GRUB 2 Boot Editor
- 14.2 Boot Code Options
- 14.3 Code Options
- 14.4 Boot Loader Options
- 14.5 Kernel Parameters
- 15.1 Services Manager
- 17.1 YaST systemd Journal
- 19.1 Simplified Layer Model for TCP/IP
- 19.2 TCP/IP Ethernet Packet
- 19.3 Configuring Network Settings
- 19.4
wickedarchitecture - 26.1 GNOME Network Connections Dialog
- 26.2
firewalldZones in NetworkManager - 30.1 YaST Service Manager
- 31.1 NTP Configuration Window
- 31.2 Adding a Time Server
- 32.1 DNS Server Installation: Forwarder Settings
- 32.2 DNS Server Installation: DNS Zones
- 32.3 DNS Server Installation: Finish Wizard
- 32.4 DNS Server: Logging
- 32.5 DNS Server: Zone Editor (Basics)
- 32.6 DNS Server: Zone Editor (NS Records)
- 32.7 DNS Server: Zone Editor (MX Records)
- 32.8 DNS Server: Zone Editor (SOA)
- 32.9 Adding a Record for a Master Zone
- 32.10 Adding a Reverse Zone
- 32.11 Adding a Reverse Record
- 33.1 DHCP Server: Card Selection
- 33.2 DHCP Server: Global Settings
- 33.3 DHCP Server: Dynamic DHCP
- 33.4 DHCP Server: Start-Up
- 33.5 DHCP Server: Host Management
- 33.6 DHCP Server: Chroot Jail and Declarations
- 33.7 DHCP Server: Selecting a Declaration Type
- 33.8 DHCP Server: Configuring Subnets
- 33.9 DHCP Server: TSIG Configuration
- 33.10 DHCP Server: Interface Configuration for Dynamic DNS
- 33.11 DHCP Server: Network Interface and Firewall
- 34.1 NFS Server Configuration Tool
- 35.1 Determining Windows Domain Membership
- 35.2 Windows Explorer Dialog
- 35.3 Windows Explorer Directory Listing with Compressed Files
- 35.4 Adding a New Samba Share with Snapshotting Enabled
- 35.5 The tab in Windows Explorer
- 38.1 HTTP Server Wizard: Default Host
- 38.2 HTTP Server Wizard: Summary
- 38.3 HTTP Server Configuration: Listen Ports and Addresses
- 38.4 HTTP Server Configuration: Server Modules
- 39.1 FTP Server Configuration — Start-Up
- 43.1 HTML Report Generated by SCA Tool
- 43.2 HTML Report Generated by SCA Appliance
List of Tables
- 1.1 Bash Configuration Files for Login Shells
- 1.2 Bash Configuration Files for Non-Login Shells
- 1.3 Special Files for Bash
- 1.4 Overview of a Standard Directory Tree
- 1.5 Useful Environment Variables
- 2.1 Useful Flags and Options
- 6.1 The Most Important RPM Query Options
- 6.2 RPM Verify Options
- 15.1 Service Management Commands
- 15.2 Commands for Enabling and Disabling Services
- 15.3 System V Runlevels and
systemdTarget Units - 19.1 Private IP Address Domains
- 19.2 Parameters for /etc/host.conf
- 19.3 Databases Available via /etc/nsswitch.conf
- 19.4 Configuration Options for NSS “Databases”
- 19.5 Feature Comparison between Bonding and Team
- 21.1 Generating PFL from Fontconfig rules
- 21.2 Results from Generating PFL from Fontconfig Rules with Changed Order
- 21.3 Results from Generating PFL from Fontconfig Rules
- 25.1
ulimit: Setting Resources for the User - 41.1 Commands for Managing sfcbd
- 42.1 Man Pages—Categories and Descriptions
- 43.1 Comparison of Features and File Names in the TAR Archive
- 44.1 Log Files
- 44.2 System Information With the
/procFile System - 44.3 System Information With the
/sysFile System
List of Examples
- 1.1 A Shell Script Printing a Text
- 6.1 Zypper—List of Known Repositories
- 6.2
rpm -q -i wget - 6.3 Script to Search for Packages
- 7.1 Example timeline configuration
- 14.1 Usage of grub2-mkconfig
- 14.2 Usage of grub2-mkrescue
- 14.3 Usage of grub2-script-check
- 14.4 Usage of grub2-once
- 15.1 List Active Services
- 15.2 List Failed Services
- 15.3 List all Processes Belonging to a Service
- 18.1 Alternatives System of the
javaCommand - 19.1 Writing IP Addresses
- 19.2 Linking IP Addresses to the Netmask
- 19.3 Sample IPv6 Address
- 19.4 IPv6 Address Specifying the Prefix Length
- 19.5 Common Network Interfaces and Some Static Routes
- 19.6
/var/run/netconfig/resolv.conf - 19.7
/etc/hosts - 19.8
/etc/networks - 19.9
/etc/host.conf - 19.10
/etc/nsswitch.conf - 19.11 Output of the Command ping
- 19.12 Configuration for Load Balancing with Network Teaming
- 19.13 Configuration for DHCP Network Teaming Device
- 20.1 Error Message from
lpd - 20.2 Broadcast from the CUPS Network Server
- 21.1 Specifying Rendering Algorithms
- 21.2 Aliases and Family Name Substitutions
- 21.3 Aliases and Family Name Substitutions
- 21.4 Aliases and Family Names Substitutions
- 24.1 Example
udevRules - 25.1 Entry in /etc/crontab
- 25.2 /etc/crontab: Remove Time Stamp Files
- 25.3
ulimit: Settings in~/.bashrc - 32.1 Forwarding Options in named.conf
- 32.2 A Basic /etc/named.conf
- 32.3 Entry to Disable Logging
- 32.4 Zone Entry for example.com
- 32.5 Zone Entry for example.net
- 32.6 The /var/lib/named/example.com.zone File
- 32.7 Reverse Lookup
- 33.1 The Configuration File /etc/dhcpd.conf
- 33.2 Additions to the Configuration File
- 35.1 A CD-ROM Share
- 35.2 [homes] Share
- 35.3 Global Section in smb.conf
- 35.4 Using
rpcclientto Request a Windows Server 2012 Share Snapshot - 38.1 Basic Examples of Name-Based
VirtualHostEntries - 38.2 Name-Based
VirtualHostDirectives - 38.3 IP-Based
VirtualHostDirectives - 38.4 Basic
VirtualHostConfiguration - 38.5 VirtualHost CGI Configuration
- 40.1 A Request With
squidclient - 40.2 Defining ACL Rules
- 43.1 Output of
hostinfoWhen Logging In asroot
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