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Hands-On Linux Administration on Azure

You're reading from Hands-On Linux Administration on Azure Explore the essential Linux administration skills you need to deploy and manage Azure-based workloads

Product type Paperback

Published in Aug 2018

Publisher Packt

ISBN-13 9781789130966

Length 410 pages

Edition 1st Edition

Languages

PowerShell

Tools

Azure

Concepts

System Administration

Author (1):

Frederik Vos

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Table of Contents (18) Chapters

Title Page

Packt Upsell

Contributors

Preface

1. Exploring the Azure Cloud

2. Getting Started with the Azure Cloud FREE CHAPTER

3. Basic Linux Administration

4. Managing Azure

5. Advanced Linux Administration

6. Managing Linux Security and Identities

7. Deploying Your Virtual Machines

8. Exploring Continuous Configuration Automation

9. Container Virtualization in Azure

10. Working with Azure Kubernetes Service

11. Troubleshooting and Monitoring Your Workloads

1. Assessments

2. Other Books You May Enjoy

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Index

Logging in Linux

In earlier chapters, we already encountered the journalctl command. In this chapter, I'll discuss this command in much more detail.

In Linux distributions, such as the latest versions of RHEL/CentOS, Debian, Ubuntu and SUSE, that uses systemd as their init system, the systemd-journald daemon is used for logging. This daemon collects the standard output of a unit, syslog message, and, if the application support it: direct messages from the application to systemd.

The logs are collected in a database that can be queried with journalctl.

Working with journalctl

If you execute systemctl status <unit>, you already see the last entries of the logging. To see the full log, journalctl is the tool that you need. There is a difference with systemctl: you can view the status on other hosts, using the -H parameter. You can't use the journalctl to connect to other hosts. Both utilities have the parameter -M to connect to systemd-nspawn and Rkt containers.

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Authors (1)

Frederik Vos

Frederik Vos

Frederik Vos, living in Purmerend, a city near Amsterdam in the Netherlands, works as a senior technical trainer of virtualization technologies, such as Citrix XenServer, and VMware vSphere. He specializes in data center infrastructures (hypervisor, network, and storage) and cloud computing (CloudStack, CloudPlatform, OpenStack, and Azure). He is also a Linux trainer and evangelist. He has a lot of knowledge as a teacher and also real-world experience as a system administrator. For the last three years he has been working as a freelance trainer and consultant within the ITGilde Cooperation, delivering many Linux training, such as Linux on Azure training for the Linux Foundation.

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