Can’t access USB devices in VirtualBox Guests on OSX Host

For some reason or the other, my USB Mass Storage Device (ie. USB Stick) is greyed out in VirtualBox 3.1.2 on a OS X 10.6.2 host.

According to „USB Devices unavailable/grayed-out due to permission problem“ on the VirtualBox Forums, this seems to be a known defect.

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Update:

It turns out, that it’s possible to access the USB Mass Storage Device after unmounting it in the OS X host. Kinda logical, if you think about it 😉

Linux „at“ ignores timezone

While trying to solve some Nagios issue, I remembered that there’s the „at“ command scheduler. It allows to execute a given command at a specified time. So, for example, it’s possible to say „run the SMS sending command at 7 o’clock“:

echo sms-sending-command | at 07:00

If invoked like that, 07:00 is interpreted to mean „07:00 in the current timezone„. It’s also possible to say that 07:00 is supposed to be in the UTC timezone, like so:

echo sms-sending-command | at 07:00 UTC

On my Solaris 10 machines (and also on my Mac OS X notebook), this really works like it should — but on Linux (I tested ArchLinux, Debian & Mandriva), it doesn’t 😦 Check this out: Weiterlesen