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Comment by msm23 | Hacker News Reader

Running

  ps auxwwe

on Linux, Mac OS X, and other Unix-en will show all processes for all users with their complete environment.

Environment variables should not be used to share secrets.

Testing on Linux, if ran as root it does, but if you are running ps auxwwe as normal user, it is only showing env variables for that user.

On FreeBSD, at least, the ability to see processes belonging to other {g,u}id's can be turned off via a sysctl.