SUSE Linux Enterprise Server 15 SP3
This guide covers system administration tasks like maintaining, monitoring and customizing an initially installed system.
Publication Date: July 25, 2024
- Preface
- I Common tasks
- 1 Bash and Bash scripts
- 2
sudobasics - 3 Using YaST
- 4 YaST in text mode
- 5 YaST online update
- 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 More information
- 24.1 The
- 25 Special system features
- 26 Using NetworkManager
- 27 Power management
- 28 Persistent memory
- IV Services
- 29 Service management with YaST
- 30 Time synchronization with NTP
- 31 The domain name system
- 32 DHCP
- 33 SLP
- 34 The Apache HTTP server
- 34.1 Quick start
- 34.2 Configuring Apache
- 34.3 Starting and stopping Apache
- 34.4 Installing, activating, and configuring modules
- 34.5 Enabling CGI scripts
- 34.6 Setting up a secure Web server with SSL
- 34.7 Running multiple Apache instances on the same server
- 34.8 Avoiding security problems
- 34.9 Troubleshooting
- 34.10 More information
- 35 Setting up an FTP server with YaST
- 36 Squid caching proxy server
- 36.1 Some facts about proxy servers
- 36.2 System requirements
- 36.3 Basic usage of Squid
- 36.4 The YaST Squid module
- 36.5 The Squid configuration file
- 36.6 Configuring a transparent proxy
- 36.7 Using the Squid cache manager CGI interface (
cachemgr.cgi) - 36.8 Cache report generation with Calamaris
- 36.9 More information
- 37 Web Based Enterprise Management using SFCB
- V Troubleshooting
- A An example network
- B GNU licenses
List of Figures
- 4.1 Main window of YaST in text mode
- 4.2 The software installation module
- 5.1 YaST online update
- 5.2 Viewing retracted patches and history
- 5.3 YaST online update configuration
- 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 - 29.1 YaST service manager
- 30.1 NTP configuration window
- 30.2 Adding a time server
- 31.1 DNS server installation: forwarder settings
- 31.2 DNS server installation: DNS zones
- 31.3 DNS server installation: finish wizard
- 31.4 DNS server: logging
- 31.5 DNS server: Zone Editor (Basics)
- 31.6 DNS server: Zone Editor (NS Records)
- 31.7 DNS server: Zone Editor (MX Records)
- 31.8 DNS server: Zone Editor (SOA)
- 31.9 Adding a record for a master zone
- 31.10 Adding a reverse zone
- 31.11 Adding a reverse record
- 32.1 DHCP server: card selection
- 32.2 DHCP server: global settings
- 32.3 DHCP server: dynamic DHCP
- 32.4 DHCP server: start-up
- 32.5 DHCP server: host management
- 32.6 DHCP server: chroot jail and declarations
- 32.7 DHCP server: selecting a declaration type
- 32.8 DHCP server: configuring subnets
- 32.9 DHCP server: TSIG configuration
- 32.10 DHCP server: interface configuration for dynamic DNS
- 32.11 DHCP server: network interface and firewall
- 34.1 HTTP server wizard: default host
- 34.2 HTTP server wizard: summary
- 34.3 HTTP server configuration: listen ports and addresses
- 34.4 HTTP server configuration: server modules
- 35.1 FTP server configuration — start-up
- 39.1 HTML report generated by SCA tool
- 39.2 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
- 6.1 Essential 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 - 37.1 Commands for managing sfcbd
- 38.1 Man pages—categories and descriptions
- 39.1 Comparison of features and file names in the TAR archive
- 40.1 Log files
- 40.2 System information with the
/procfile system - 40.3 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 - 31.1 Forwarding options in named.conf
- 31.2 A basic /etc/named.conf
- 31.3 Entry to disable logging
- 31.4 Zone entry for example.com
- 31.5 Zone entry for example.net
- 31.6 The /var/lib/named/example.com.zone file
- 31.7 Reverse lookup
- 32.1 The configuration file /etc/dhcpd.conf
- 32.2 Additions to the configuration file
- 34.1 Basic examples of name-based
VirtualHostentries - 34.2 Name-based
VirtualHostdirectives - 34.3 IP-based
VirtualHostdirectives - 34.4 Basic
VirtualHostconfiguration - 34.5 VirtualHost CGI configuration
- 36.1 A request with
squidclient - 36.2 Defining ACL rules
- 39.1 Output of
hostinfowhen logging in asroot
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