IT-230

Linux Administration

Exercise

Activating a Tuning Profile Exercise

Task

Switch servera from its default tuning profile to one built for low-latency networking, then confirm the change took effect and survives a restart.

Host
servera
Target profile
network-latency
Original
virtual-guest

  1. Install tuned and start it

    sudo dnf install -y tuned
sudo systemctl enable --now tuned
systemctl is-active tuned

  2. Find the active profile

    tuned-adm active

  3. Read what network-latency changes

    tuned-adm list

    Then read the profile itself rather than trusting the one-line summary. 

    cat /usr/lib/tuned/profiles/network-latency/tuned.conf

  4. Activate it

    sudo tuned-adm profile network-latency
tuned-adm active

  5. Verify it took effect

    Ask tuned whether the running system actually matches the profile it reports as active. 

    tuned-adm verify

    So restart the machine. Wait for it to come back, then connect again. 

    sudo reboot
ssh servera

    Verify a second time, with nothing left waiting on a restart, and read what tuned recorded. 

    tuned-adm verify
sudo tail -n5 /var/log/tuned/tuned.log

  6. Put the original profile back

    sudo tuned-adm profile virtual-guest
tuned-adm active
sudo systemctl disable --now tuned
sudo dnf remove -y tuned