整了两天都没能装上

提示信息如下~~~

[root@localhost Desktop]# rpm -ivh libpcap-devel-1.4.0-1.el6.rft.i686.rpm --force --nodeps
warning: libpcap-devel-1.4.0-1.el6.rft.i686.rpm: Header V3 DSA signature: NOKEY, key ID 6b8d79e6
Preparing...                ########################################### [100%]
   1:libpcap-devel          ########################################### [100%]
error: unpacking of archive failed: cpio: Bad magic

有于大神遇见过吗