Failed to fetch xz:/var/lib/apt/lists/partial/ftp.us.debian.org_debian_dists_experimental_main_binary-i386_Packages Hash Sum mismatch
Failed to fetch bzip2:/var/lib/apt/lists/partial/ftp.us.debian.org_debian_dists_experimental_main_i18n_Translation-en Hash Sum mismatch
Some index files failed to download. They have been ignored, or old ones used instead.
This happens occasionally, there may be servers at Debian being updated or slow links
All you have to do is wait a bit and try again and it resolves