Tag: Red Hat

Categories
Computer Professional Computing Programming

WildFly

I started reading Red Hat Application Development I: Programming in Java EE and wanted to setup an “Enterprise Application Platform”. I found a Red Hat EAP 7 offering (it’s kind of hidden!) but the WildFly project caught my eye along the way.

I was initially thinking I would run WildFly on DigitalOcean and found: https://www.liquidweb.com/kb/how-to-install-wildfly-on-centos-8/. Then I thought it might be easier and more fun to run it on my laptop as a toy in-home enterprise application server. So I followed the instructions on my RHEL8 machine and now the computers on my home network can access the fledgling EAP 🙂

Categories
Computer Professional Programming

cpupower

I’ve been reading the Red Hat System Administration I course material and came across an interesting utility: cpupower!

You can use it to view your CPU frequency and set the range it can operate in: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/power_management_guide/tuning_cpufreq_policy_and_speed

Here’s me making my laptop CPU slower 🙂

$ cpupower frequency-info
analyzing CPU 0:
...
current CPU frequency: 2.73 GHz (asserted by call to kernel)
...

$ sudo cpupower frequency-set -u 400000
Setting cpu: 0
...

$ cpupower frequency-info
analyzing CPU 0:
...
current CPU frequency: 400 MHz (asserted by call to kernel)
...