apt-get update problem

[rockyo@max-source.com]

Hey List,

I did KNOPPIX 4.0.2 HD installation. the problem is that I could not get apt-get
to install or remove any package. When I tried apt-get update I got the
following message.

###
root@lijiang:/var/lib/apt/lists# apt-get update
E: Could not get lock /var/lib/apt/lists/lock - open (11 Resource temporarily
unavailable)
E: Unable to lock the list directory
#####

Any hint to solve the problem will be highly appreciated!

Thanks a lot in advance!
Rocky