Following up to the article written yesterday you will likely have also received this error if you also received the error regarding the apt-mirror.lock file when attempting to mirror a repository on Ubuntu Linux using apt-mirror. The current error relates to the fact that a skel directory does not exist in the root directory of the repo you are attempting to create. Below the error is described in more detail as well as instructions for fixing it by creating the skel directory.
When setting up your own repository on Ubuntu Linux using apt-mirror you may run into an error letting you know that the apt-mirror.lock file could not be created. This is likely because a var directory does not already exist in the root of the repository you are creating. Use the information below to create the var directory and resolve the apt-mirror.lock problem.