What are the total number of users operating in a linux os at a time?

Question

I wanted to know the answer since I couldn't find it anywhere. Answer It depends on the maximum UID and PID. UIDs are 32 bit, so it can be 4,294,967,296, but PID range is narrower: 2^22, which is exactly: 4,194,304. This is the theoretic maximum; in real world there are some running daemons already, so approximately 4 million. (on 32bit

Accepted Answer

It depends on the maximum UID and PID. UIDs are 32 bit, so it can be 4,294,967,296, but PID range is narrower: 2^22, which is exactly: 4,194,304. This is the theoretic maximum; in real world there are some running daemons already, so approximately 4 million. (on 32bit it&#8217;s only 32,768)

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