RHCSA Rapid Track

From workstation, use SSH to log in to servera as the student user. The systems are configured to use SSH keys for authentication, therefore a password is not required.

[student@workstation ~]$ ssh student@servera
...output omitted...
[student@servera ~]$ 

Verify that the tuned package is installed, enabled, and started.

1. Use yum to confirm that the tuned package is installed.

   [student@servera ~]$ yum list tuned
   ...output omitted...
   Installed Packages
   tuned.noarch                    2.10.0-15.el8                    @anaconda
   

2. The systemctl is-enabled tuned command shows whether the service is enabled.

   [student@servera ~]$ systemctl is-enabled tuned
   enabled
   

3. The systemctl is-active tuned command show whether the service is currently running.

   [student@servera ~]$ systemctl is-active tuned
   active
   

List the available tuning profiles and identify the active profile. If sudo prompts for a password, enter student after the prompt.

[student@servera ~]$ sudo tuned-adm list
[sudo] password for student: student
Available profiles:
- balanced               - General non-specialized tuned profile
- desktop                - Optimize for the desktop use-case
- latency-performance    - Optimize for deterministic performance at the cost of
                           increased power consumption
- network-latency        - Optimize for deterministic performance at the cost of
                           increased power consumption, focused on low latency
                           network performance
- network-throughput     - Optimize for streaming network throughput, generally
                           only necessary on older CPUs or 40G+ networks
- powersave              - Optimize for low power consumption
- throughput-performance - Broadly applicable tuning that provides excellent
                           performance across a variety of common server workloads
- virtual-guest          - Optimize for running inside a virtual guest
- virtual-host           - Optimize for running KVM guests
Current active profile: virtual-guest

Change the current active tuning profile to powersave, then confirm the results. If sudo prompts for a password, enter student after the prompt.

1. Change the current active tuning profile.

   [student@servera ~]$ sudo tuned-adm profile powersave
   

2. Confirm that powersave is the active tuning profile.

   [student@servera ~]$ sudo tuned-adm active
   Current active profile: powersave
   

Exit from servera.

[student@servera ~]$ exit
logout
Connection to servera closed.
[student@workstation ~]$