As I have difficulties downloading big files via You or Synaptic I have downloaded the k_deflt-2.4.21-166.i586.rpm with prozgui which allows me to speed up the download and resume downloading when disconnected. After download I wanted to install the latest kernel with rpm -Uvh but the installation is not successful. I get following info : V3 DSA signature: BAD, key ID 9c800aca k_deflt-2.4.21-166.i586.rpm cannot be installed At first I thought it had something to do with the download but after downloading the kernel a second time, I get exactly the same info. From Google I found that it could have something to do with dependencies but I do not see why because if I start Synaptic it does not want extra packages downloaded and it does not complain about dependencies. Any idea?