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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

Monitoring services using journalctl


Systemd's journal has the added advantage that its controls allow you to easily narrow down on messages generated by specific services.

How to do it…

Here are the steps you need to perform for this recipe:

  1. First, display all the messages generated by your system.

    This will show all the messages generated on the system; run the following commands:

    ~]# journalctl
    -- Logs begin at Fri 2015-06-26 23:37:30 CEST, end at Sat 2015-07-25 00:30:01 CEST. --
    Jun 26 23:37:30 rhel7.mydomain.lan systemd-journal[106]: Runtime journal is using 8.0M (max 396.0M, leaving 594.0M of free 3.8G, current limit 396.0M).
    Jun 26 23:37:30 rhel7.mydomain.lan systemd-journal[106]: Runtime journal is using 8.0M (max 396.0M, leaving 594.0M of free 3.8G, current limit 396.0M).
    Jun 26 23:37:30 rhel7.mydomain.lan kernel: Initializing cgroup subsys cpuset
    ...
    ~]#
    
  2. Now, display all system-related messages.

    This command shows all the messages related to the system and not its users:

    ~]# journalctl...
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