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Red Hat Enterprise Linux Server Cookbook

You're reading from   Red Hat Enterprise Linux Server Cookbook Over 60 recipes to help you build, configure, and orchestrate RHEL 7 Server to make your everyday administration experience seamless

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Product type Paperback
Published in Dec 2015
Publisher
ISBN-13 9781784392017
Length 250 pages
Edition 1st Edition
Tools
Concepts
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Authors (2):
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Jakub Gaj Jakub Gaj
Author Profile Icon Jakub Gaj
Jakub Gaj
William Leemans William Leemans
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William Leemans
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Toc

Table of Contents (12) Chapters Close

Preface 1. Working with KVM Guests FREE CHAPTER 2. Deploying RHEL "En Masse" 3. Configuring Your Network 4. Configuring Your New System 5. Using SELinux 6. Orchestrating with Ansible 7. Puppet Configuration Management 8. Yum and Repositories 9. Securing RHEL 7 10. Monitoring and Performance Tuning Index

The systemd service and setting runlevels

The systemd service doesn't use runlevels as SysV or Upstart do. The alternatives for systemd are called targets. Their purpose is to group a set of systemd units (not only services, but also sockets, devices, and so on) through a chain of dependencies.

How to do it…

Managing targets with systemd is pretty simple, as shown through the following steps:

  1. List all target units, as follows:
    ~]# systemctl list-unit-files --type target
    UNIT FILE                 STATE   
    anaconda.target           static  
    basic.target              static  
    bluetooth.target          static  
    cryptsetup.target         static  
    ctrl-alt-del.target       disabled
    default.target            enabled
    ...
    
    sysinit.target            static  
    system-update.target      static  
    time-sync.target          static  
    timers.target             static  
    umount.target             static  
    
    58 unit files listed.
    ~]#
    

    This list shows all target units available followed by information...

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