- Lab
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Managing File Attributes and Permissions
A firm understanding of how to manage file and directory attributes and permissions is one of the foundations of a being a successful system administrator. This activity will help you reinforce your understanding of key utilities like chmod along with how to apply the desired permissions to users, groups and 'everyone' on the system. Once you complete this learning activity, you will have a firm grasp on how permissions work across files and directories on your system.

Lab Info
Table of Contents
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Challenge
Reset Permissions on /opt/myapp Directory
In order to allow access to the /opt/myapp directory, the student will need to provide specific permissions to the directory itself so it can be read by users other than the owner.
Accomplish this task with:
sudo chmod 755 /opt/myapp
Optionally, although less secure, the following would meet the requirements as well:
sudo chmod 777 /opt/myapp
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Challenge
Permissions on Files and Folders Within /opt/myapp
The student is asked to allow read and write permissions to all files and folders within the /opt/myapp directory (including files within the subfolders recursively).
This task can be completed successfully via:
sudo chmod 666 -R /opt/myapp/*
Note: For users to be able to navigate into directories, the directories must be set as executable. You can do this with:
sudo find /opt/myapp -type d -exec chmod o+x {} \;
About the author
Real skill practice before real-world application
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.
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