Hardening /proc Hide Processes from other Users

To prevent access to view Processes of other Users edit:

$sudo nano /etc/fstab

Insert:

proc    /proc    proc    defaults,hidepid=2,relatime     0     0  #relatime raspian

Run on console changes without reboot needed:

mount -o remount,rw,hidepid=2,relatime /proc

Test:

$top
$htop
$ps ax

Should only view own jobs