Password

• random character text

# alphabetic and numeric character: 
< /dev/urandom tr -dc "[:alnum:]" | head -c1000

• with semantic
  • password (pwgen) / pronoucable (gpw)
  • md5pass (from other passphrase)
  • apg

see also

• Veracrypt
  • fork of Truecrypt (read through HN for gory details) - own by DGSE?
  • tutorial

• Shufflecake - plausible deniability for multiple hidden filesystems on Linux

• cryptomator / github - Cryptomator encrypts your data quickly and easily. Afterwards you upload them protected to your favorite cloud service.
  • Syncthing - could be an alternative to cloud