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ContentsContents
Administration Guide
  1. About This Guide
  2. I Common Tasks
    1. 1 Bash and Bash Scripts
    2. 2 sudo
    3. 3 YaST Online Update
    4. 4 YaST
    5. 5 YaST in Text Mode
    6. 6 Managing Software with Command Line Tools
    7. 7 System Recovery and Snapshot Management with Snapper
    8. 8 Live kernel patching with KLP
    9. 9 Transactional Updates
    10. 10 Remote Graphical Sessions with VNC
    11. 11 File Copying with RSync
  3. II Booting a Linux System
    1. 12 Introduction to the Boot Process
    2. 13 UEFI (Unified Extensible Firmware Interface)
    3. 14 The Boot Loader GRUB 2
    4. 15 The systemd Daemon
  4. III System
    1. 16 32-Bit and 64-Bit Applications in a 64-Bit System Environment
    2. 17 journalctl: Query the systemd Journal
    3. 18 update-alternatives: Managing Multiple Versions of Commands and Files
    4. 19 Basic Networking
    5. 20 Printer Operation
    6. 21 Graphical User Interface
    7. 22 Accessing File Systems with FUSE
    8. 23 Managing Kernel Modules
    9. 24 Dynamic Kernel Device Management with udev
    10. 25 Special System Features
    11. 26 Using NetworkManager
    12. 27 Power Management
    13. 28 VM Guest
    14. 29 Persistent Memory
  5. IV Services
    1. 30 Service Management with YaST
    2. 31 Time Synchronization with NTP
    3. 32 The Domain Name System
    4. 33 DHCP
    5. 34 Sharing File Systems with NFS
    6. 35 Samba
    7. 36 On-Demand Mounting with Autofs
    8. 37 SLP
    9. 38 The Apache HTTP Server
    10. 39 Setting Up an FTP Server with YaST
    11. 40 Squid Caching Proxy Server
    12. 41 Web Based Enterprise Management Using SFCB
  6. V Troubleshooting
    1. 42 Help and Documentation
    2. 43 Gathering System Information for Support
    3. 44 Common Problems and Their Solutions
  7. A An Example Network
  8. B GNU Licenses
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Applies to SUSE Linux Enterprise Server 15 SP1

28 VM Guest Edit source

This chapter contains additional information on when SUSE Linux Enterprise Server is used in a virtual machine.

28.1 Adding and Removing CPUs

28.1 Adding and Removing CPUs Edit source

Some virtualization environments allow adding or removing CPUs while the virtual machine is running.

For safe removal of CPUs, first deactivate them by executing 

root # echo 0 > /sys/devices/system/cpu/cpuX/online

Replace X with the CPU number. To bring a CPU back online, execute 

root # echo 1 > /sys/devices/system/cpu/cpuX/online
→Chapter 29 Persistent Memory←Chapter 27 Power Management
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