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SELinux Cookbook

You're reading from SELinux Cookbook

Product type Book

Published in Sep 2014

Publisher

ISBN-13 9781783989669

Pages 240 pages

Edition 1st Edition

Languages

Concepts

System Administration

Author (1):

Sven Vermeulen

Table of Contents (17) Chapters

SELinux Cookbook

Credits

About the Author

About the Reviewers

www.PacktPub.com

Preface

1. The SELinux Development Environment

2. Dealing with File Labels

3. Confining Web Applications

4. Creating a Desktop Application Policy

5. Creating a Server Policy

6. Setting Up Separate Roles

7. Choosing the Confinement Level

8. Debugging SELinux

9. Aligning SELinux with DAC

10. Handling SELinux-aware Applications

Index

Managing SELinux users

In order to grant a Linux login the right set of roles, we first need to create an SELinux user that has just those roles assigned. Existing SELinux users can be modified easily, and if an SELinux user was added previously, it can be removed from the system as well.

How to do it…

Managing SELinux users is done as follows:

Use semanage user to list the currently available SELinux users:

~# semanage user -l
                Labeling   MLS/       MLS/
SELinux User    Prefix     MCS Level  MCS Range                      SELinux Roles

git_shell_u     user       s0         s0                             git_shell_r
guest_u         user       s0         s0                             guest_r
root            user       s0         s0-s0:c0.c1023                 staff_r sysadm_r system_r unconfined_r
staff_u         user       s0         s0-s0:c0.c1023                 staff_r sysadm_r system_r unconfined_r
sysadm_u        user       s0         s0-s0:c0.c1023                 sysadm_r...

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Authors (1)

Sven Vermeulen

Sven Vermeulen (sjvermeu on Twitter) is a long-term contributor to various free software projects and the author of several online guides and resources, including the Gentoo Handbook. He got his first taste of free software in 1997 and never looked back. Within SELinux, Sven contributed several policies to the Reference Policy project, and actively participated in policy development and user space development projects. In his daily job, Sven is an enterprise architect in a European financial institution as well as a self-employed solution engineer and consultant. Prior to this, he graduated with an MSE in computer engineering from Ghent University and an MSc in ICT enterprise architecture from IC Institute.

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