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Manage kernel modules and their parameters

In this exercise, you need to modify a kernel module to provide more information. *This course is not approved or sponsored by Red Hat.*

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Path Info

Level
Clock icon Advanced
Duration
Clock icon 1h 0m
Published
Clock icon Apr 04, 2019

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Table of Contents

  1. Challenge

    Enable nf_conntrack time stamping in the running kernel.

    Check to see if the module is loaded:

    lsmod | grep nf_conntrack

    View the parameters available for the nf_conntrack module:

    modinfo nf_conntrack

    Verify the current setting of the timestamp parameter:

    cat /sys/module/nf_conntrack/parameters/tstamp

    Stop the firewall and unload the module:

    systemctl stop firewalld

    modprobe -r nf_conntrack

    Load the module with timestamping enabled:

    modprobe nf_conntrack tstamp=1

    Verify the current setting of the timestamp parameter:

    cat /sys/module/nf_conntrack/parameters/tstamp

  2. Challenge

    Make the change persist through a restart.

    Make the change persist through a reboot:

    echo "options nf_conntrack tstamp=1" > /etc/modprobe.d/nf_conntrack.conf
A Cloud Guru - Labs - Manage kernel modules and their parameters
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A Cloud Guru

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