mash is a tool that creates repositories from koji tags, and solves them for multilib dependencies. Mash takes a .mash settings file and generates a yum repository. For example: $ mash --output /mnt/repo/ f15 This tells mash to generate the repository to /mnt/repo, and to use the configuration file "f15.mash". Mash's main configuration is at /etc/mash/mash.conf, which contains basic settings for using mash. Individual configurations end in mash, such as 'rawhide.mash' or 'f15-updates.mash'.