View source for Hardening /proc Hide Processes from other Users

To prevent access to view Processes of other Users edit:
<pre>
$sudo nano /etc/fstab
</pre>
Insert:
<pre>
proc    /proc    proc    defaults,hidepid=2,relatime     0     0  #relatime raspian
</pre>
Run on console changes without reboot needed:
<pre>
mount -o remount,rw,hidepid=2,relatime /proc
</pre>
Test:
<pre>
$top
$htop
$ps ax
</pre>
Should only view own jobs!


At Raspian OS (raspberry pi)is a Workaround useful:
create a Script /home/pi/mount-proc.sh
insert:
<pre>
#!/bin/bash
mount -o remount,rw,relatime,nosuid,noexec,nodev,hidepid=2 /proc
exit
</pre>
and insert /home/pi/mount-proc.sh into root crontab to run on boot:
<pre>
@reboot  sh /home/pi/mount-proc.sh > /dev/null 2>&1
</pre>