about
This site
And ideas are bulletproof.
Articles in posts record my seeings, hearings and thinkings, while manuals pages are regarded as cheatsheet for commonly-used commands.
PGP
My PGP key is 8DA72F0FD917EF8EE983B3EAE0E7309F1E51C3D0, you can find in keys.openpgp.org, keyserver.ubuntu.com, GitHub or Salsa.