nohup process pid not visible in new shell but still in old shell

Question

I open and connect an ssh terminal window shell to my server and run this:

nohup sleep 50000 &

When I then run ps I see this:

  PID TTY          TIME CMD
    1 ?        00:00:00 bash
   56 ?        00:00:00 sleep
  148 ?        00:00:00 ps

Now while I am still connected to first shell session and using same credentials as first session, I open up a second ssh terminal window shell to my server and run ps again and I see this:

  PID TTY          TIME CMD
    1 ?        00:00:00 bash
   86 ?        00:00:00 ps

How can I see the nohup processes that were started from the first shell session in the second shell session (assuming that I do NOT know the PID)? Or more generally, how can I see all nohup processes that are running that were started in other shells/sessions?

EDIT: Note that I also tried opening up a new shell/session with root user credentials and I still do not see the sleep process when using ps from here either.

Answer 1

If you run ps from a different shell, you will see only processes initiated by that shell session even with root privileges. To see processes initiated by other users or in a different session, use option -a or -e. See man ps.