Various shell scripts from: http://www.owlriver.com/tips/ and from general sysadmin under FLOSS compatible licenses (usually GPLv2+)

Narrative matter is: Creative Commons Attribution-ShareAlike https://creativecommons.org/licenses/by-sa/4.0/

You are free to:

Share — copy and redistribute the material in any medium or format
Adapt — remix, transform, and build upon the material
for any purpose, even commercially. 

-- Russ herrold reports to: info@owlriver.com