Ошибка при выполнении apt-get update

При выполнении apt-get update получается следующее


[root@molotilka sources.list.d]# apt-get update
Get:1 ftp://ftp.linux.kiev.ua x86_64 release [720B]
Get:2 ftp://ftp.altlinux.org x86_64 release [1016B]
E: Method ftp has died unexpectedly!
W: Release files for some repositories could not be retrieved or authenticated. Such repositories are being ignored.
E: Tried to dequeue a fetching object
E: Tried to dequeue a fetching object
E: Tried to dequeue a fetching object
E: Tried to dequeue a fetching object
E: Tried to dequeue a fetching object
E: Tried to dequeue a fetching object
E: Tried to dequeue a fetching object
E: Tried to dequeue a fetching object
E: Tried to dequeue a fetching object
E: Tried to dequeue a fetching object
E: Tried to dequeue a fetching object
E: Tried to dequeue a fetching object
E: Tried to dequeue a fetching object
E: Tried to dequeue a fetching object
E: Tried to dequeue a fetching object
E: Tried to dequeue a fetching object

Гугление не дало вменяемых результатов. Как с этим бороться?