$schemamarkup = get_post_meta(get_the_ID(), 'schemamarkup', true); if(!empty($schemamarkup)) { echo $schemamarkup; }

How to Install Evdev on RHEL-based Distros

CentOS evdev – Step by step Guide

How to Install evdev XOrg Input Device’s Driver on RHEL-based GNU/Linux Distributions.

And evdev for CentOS is a Generic Input Event Interface in the Linux Kernel and FreeBSD.

It generalizes Raw Input Events from Device Drivers and makes them available through Character Devices in the /dev/input/ Directory.

Finally, this guide includes detailed instructions on Getting Started with evdev Device Emulation on CentOS.

How to Install evdev on RHEL-based GNU/Linux Distros - Featured

CentOS evdev XOrg Input Driver Guides