- Lab
- Cloud
- Security
Troubleshooting SELinux Issues
In this exercise, you will troubleshoot SELinux issues preventing a service from starting, as well as functioning correctly. *This course is not approved or sponsored by Red Hat.*
Path Info
Table of Contents
-
Challenge
Start Apache.
Attempt to start the service:
systemctl start httpdView the status log:
systemctl status httpd -lView recent SELinux errors:
ausearch -m avc -ts recentFind the inode it's attempting to write to:
find / -inum <inode number>View the SELinux context of the directory/file:
ls -Z /var/log/httpdRestore the proper file context:
restorecon -Rv /var/log/httpd -
Challenge
Resolve SELinux issues preventing viewing web content.
Attempt to view the web content:
curl localhostView recent AVC errors:
ausearch -m avc -ts recentFind the inode of the file/directory:
find / -inum <inode number>View the context of the file/directory:
ls -Z /home/cloud_user/html/index.htmlInstall
sealert:yum -y install setroubleshoot setroubleshoot-serverRestart the
auditdservice:service auditd restartUse
sealertfor more information:sealert -a /var/log/audit/audit.logLookup the
httpd_read_user_contentboolean:getsebool httpd_read_user_contentSet the boolean to permit reading user content:
setsebool -P httpd_read_user_content=1View the web content:
curl localhost
What's a lab?
Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.
Provided environment for hands-on practice
We will provide the credentials and environment necessary for you to practice right within your browser.
Guided walkthrough
Follow along with the author’s guided walkthrough and build something new in your provided environment!
Did you know?
On average, you retain 75% more of your learning if you get time for practice.