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CompTIA Linux+ Certification Guide

You're reading from   CompTIA Linux+ Certification Guide A comprehensive guide to achieving LX0-103 and LX0-104 certifications with mock exams

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Product type Paperback
Published in Sep 2018
Publisher
ISBN-13 9781789344493
Length 590 pages
Edition 1st Edition
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Author (1):
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Philip Inshanally Philip Inshanally
Author Profile Icon Philip Inshanally
Philip Inshanally
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Table of Contents (23) Chapters Close

Preface 1. Configuring the Hardware Settings FREE CHAPTER 2. Booting the System 3. Changing Runlevels and Boot Targets 4. Designing a Hard Disk Layout 5. Installing a Linux Distribution 6. Using Debian Package Management 7. Using YUM Package Management 8. Performing File Management 9. Creating, Monitoring, Killing, and Restarting Processes 10. Modifying Process Execution 11. Display Managers 12. Managing User and Group Accounts 13. Automating Tasks 14. Maintaining System Time and Logging 15. Fundamentals of Internet Protocol 16. Network Configuration and Troubleshooting 17. Performing Administrative Security Tasks 18. Shell Scripting and SQL Data Management 19. Mock Exam - 1 20. Mock Exam - 2 21. Assessment 22. Other Books You May Enjoy

Working with boot targets

We can work with boot targets using the systemctl command. We touched on systemctl earlier in this chapter. Let's use the Ubuntu distribution. We can check which target is currently the default and running in the shell in real time by doing the following:

philip@ubuntu:~$ systemctl get-default
graphical.target
philip@ubuntu:~$

From the preceding output, we can see that graphical.target is the default running target. Now, if we want to change between targets, we can use the systemctl command. Let's change to multi-user.target:

philip@ubuntu:~$ systemctl isolate multi-user.target

As soon as we press the Enter key, the system will ask us to authenticate:

We can also run systemctl to verify the status of multi-user.target:

We can return the system to the GUI environment by using the systemctl command:

Also, we can take a look at one of the targets...

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