- Lab
- A Cloud Guru
Working with Kernel Modules
The Linux system provides a framework for loadable modules which can add or remove certain functionality without the need for a restart. In this lab, you will be tasked with installing and removing kernel modules, as well as displaying additional information about them.
Path Info
Table of Contents
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Challenge
Get a Count of the Current Installed Modules and Save It to /root/current_count.txt
Display all the loaded modules:
lsmodSave the count of all the loaded modules to
/root/current_count.txt:lsmod | wc -l > /root/current_count.txt -
Challenge
Remove the target_core_mod Module and All Its Dependencies
To remove the
target_core_module, theiscsi_target_moddependency must be removed (the-voption can be used to display additional information):modprobe -r iscsi_target_modValidate the modules have been removed:
lsmod | grep target -
Challenge
Install the nfsd Module
Install the
nfsdmodule using themodprobecommand (the-voption can be used to display additional information):modprobe -v nfsdValidate that the module was loaded:
lsmod | grep nfsd -
Challenge
Display the Dependencies for the nfsd Module and Save the Names to /root/dependencies.txt
Display information for the
nfsdmodule:modinfo nsfdSave the names of the dependencies to
/root/dependencies.txt:modinfo nfsd | grep depends > /root/dependencies.txt -
Challenge
Get a Final Count of the Modules and Save It to /root/updated_count.txt
Add the output from
lsmod | wc -lto the/root/updated_count.txtfile:lsmod | wc -l > /root/updated_count.txt
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.
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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.
