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Echo is a builtin; you won't see that in the process list (not sure this method doesn't have a different weakness).

• ahnick 9y ago
  Yes, that's true. It would show up in your command history though. Even though it's probably not readable by anyone else except root, it's still probably not a good idea to have it persisted to disk.
  • Piskvorrr 9y ago
    If it's inside a script, it won't go into command history, either.
    • ahnick 9y ago
      Yeah, I was just giving an example of passing it into a script. Similarly, if encpass.sh is included in whatever.sh script the password won't show up in ps.