i wonder if anyone knows any tricks to hide a determinated command you are executing in Linux.

example: I want to execute a file that is a scritp in expect, if i do so, when someone does a `ps auxe | grep MYUSERNAME` they will see /usr/bin/expect -f filename, waht i wish is to prevent that. I tryed stupid things like renaming files, running commands from compiled c programs using system() exec() and nothing worked,
if any one has any new ideas i would ver much like to hear about it.