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Working with Linux Directory Permissions

In this lab, we'll be working with directory permissions on a Linux host. We'll start by creating some groups and directories, and then set up permissions to only allow each group to access its own directory.

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Path Info

Level
Clock icon Beginner
Duration
Clock icon 30m
Last updated
Clock icon Apr 06, 2025

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Table of Contents

  1. Challenge

    Create user groups.

    1. There are four groups to be created:

      • accounting
      • engineering
      • management
      • hr

    2. Use the sudo groupadd -g #### [groupname] command:

      • sudo groupadd -g 1111 accounting
      • sudo groupadd -g 2222 engineering
      • sudo groupadd -g 3333 management
      • sudo groupadd -g 4444 hr

  2. Challenge

    Create directories.

    1. There are four directories to be created:
      • accounting
      • engineering
      • management
      • hr
    2. Create each group using the sudo mkdir /directoryname command:
      • sudo mkdir /accounting
      • sudo mkdir /engineering
      • sudo mkdir /management
      • sudo mkdir /hr

  3. Challenge

    Add each of the newly created directories to its associated group.

    1. Use the command sudo chgrp groupname /directoryname to add each of the newly created directories to its associated group:
      • sudo chgrp accounting /accounting
      • sudo chgrp engineering /engineering
      • sudo chgrp management /management
      • sudo chgrp hr /hr

  4. Challenge

    Set group permissions on each of the newly created directories.

    1. For each of the newly created directories, use the command sudo chmod g+rwx /directoryname to give the group owner read, write, and execute permissions to the directory:
      • sudo chmod g+rwx /accounting
      • sudo chmod g+rwx /engineering
      • sudo chmod g+rwx /management
      • sudo chmod g+rwx /hr

  5. Challenge

    Prevent non-group members from accessing files.

    1. In order to prevent other non-group members from reading and executing files in each of the newly created directories, use sudo chmod o-rx /directoryname command:
      • sudo chmod o-rx /accounting
      • sudo chmod o-rx /engineering
      • sudo chmod o-rx /management
      • sudo chmod o-rx /hr
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