fc6 to fc7

因为FC7已经过时了，repo位置有点特别，要用Everything(不要用默认的baseurl)，否则很多包都缺：

fedora-core.repo

baseurl=http://archives.fedoraproject.org/pub/archive/fedora/linux/releases/7/Everything/$basearch/os/

或者有效的mirror

baseurl=http://ftp-stud.hs-esslingen.de/pub/Mirrors/archive.fedoraproject.org/fedora/linux/releases/7/Everything/$basearch/os/

如果遇到 Error: Missing Dependency: python(abi) = 2.4 is needed by package authconfig. 

直接

yum remove authconfig

yum -y upgrade