I check the manual of
ps, and it said
-e will list all processes, while
-u will list processes for a specific user.
So I try to use
ps -eu myaccount | wc -l and it outputs 280.
But if I use
ps -u myaccount | wc -l and it outputs 12.
Since both are used to output all the processes for the user
myaccount, why the result will be different?