Question

Which option is used with ps command to list system processes?

(a) -A

(b) -a

(c) -e

(d) –A and -e

I got this question in my homework.

I'd like to ask this question from Process Status:ps Command and Phases of a Process topic in section The Process of Unix

Answer 1

Right option is (d) –A and -e

Explanation: Apart from processes a user generates, a number of system processes keep running all the time. Most of them are not associated with any terminal. To list all process on our machine, we can use either -A or -e option with ps command. But beware, this list could be very long on a busy system.