Issue After Reboot

Gang Gong Moy gmoy8888 at
Fri Jan 6 04:28:47 GMT 2012

I tried using "/dev/ttyACM0", but ekeyd seemed unable to recognize it; ekeyd.conf also refers to "/var/run/entropykeys", which is not created after a reboot.

Since my Linux box is rarely rebooted, I'll come back to this issue some other time. It's hardly a show-stopper now.

Thanks for the suggestions.

 From: "Thomas, Chris" <CThomas at>
To: Gang Gong Moy <gmoy8888 at> 
Cc: "entropykey-users at" <entropykey-users at> 
Sent: Thursday, January 5, 2012 4:02 PM
Subject: RE: Issue After Reboot

It’s because the udev rules don’t work in RHEL/CentOS which are supposed to create a symlink in /dev/entropykey that the default ekeyd config is looking for.  One way around it if you are only going to use one key in the system is to change /etc/entropykey/ekeyd.conf to have a line “AddKey /dev/ttyACM0” rather than the default one of “AddKeys /dev/entropykey”.  (Make sure to put the device path in quotes.)  This avoids the whole issue of udev not creating the link on boot.  Maybe one of these days I’ll fix the udev rules.
Chris Thomas
MedPlus, A Quest Diagnostics Company| Senior Unix Administrator | 4690 Parkway Drive | Mason, OH 45040 USA | phone +1.513.204.2711 | cthomas at|
From:entropykey-users-bounces at [mailto:entropykey-users-bounces at] On Behalf Of Gang Gong Moy
Sent: Thursday, January 05, 2012 1:21 PM
To: entropykey-users at
Subject: Issue After Reboot
I received the entropy key recently and I've been generally impressed by it. One minor question that has come up is whether the USB driver fails to detect and connect to the device after a reboot. 
I'm using Centos 5.4. If I perform a reboot with the device attached to the computer, then it doesn't seem to work properly. The 'ekeydctl list' command shows nothing running after the reboot and "entropy_avail" is low. On the other hand, if I plug in the device after the boot up completes, everything works normally.

Confidentiality Notice: The information contained in this electronic transmission is confidential and may be legally privileged. It is intended only for the addressee(s) named above. If you are not an intended recipient, be aware that any disclosure, copying, distribution or use of the information contained in this transmission is prohibited and may be unlawful. If you have received this transmission in error, please notify us by telephone (513) 229-5500 or by email (postmaster at After replying, please erase it from your computer system.

EntropyKey-users mailing list
EntropyKey-users at
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <>

More information about the EntropyKey-users mailing list