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 C1B48F62D2CDFC30DF71155CB7CF3D6AD9CA2BC0, you can find in keys.openpgp.org, GitHub or Salsa.