What famous quote does the following terminal session refer to?
$ ps -o ppid= -p $u 28342 $ echo $$ 28342
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"I am your father", Vader's famous quote to Luke from Star Wars: Episode V – The Empire Strikes Back (1980) ?
I think the first command gives the pid of the parent of the specified process, and the second line confirms that the current process is that process.
Hmmm, I think it's
"We're the same, you and me. We're the same, don't you see?" from Falling Down, 1993
Reasoning: Your first command gives the pid of the process designated by $u. The second command gives the pid of the current bash process that you are running. Since both pid's are equivalent, u (you) and the current bash session (me) are the same.