/etc/apt/sources.list
以下を追加して他の行をコメントアウト (YYYY/MM/DD は日付)deb http://snapshot.debian.net/archive/YYYY/MM/DD/debian unstable main contrib non-free
deb http://snapshot.debian.net/archive/YYYY/MM/DD/debian-non-US unstable/non-US main contrib non-free
deb-src http://snapshot.debian.net/archive/YYYY/MM/DD/debian unstable main contrib non-free
deb-src http://snapshot.debian.net/archive/YYYY/MM/DD/debian-non-US unstable/non-US main contrib non-free
deb http://snapshot.debian.net/archive/YYYY/MM/DD/debian unstable main contrib non-free
アップデート
# apt-get update
- ダウングレード
# apt-get install apache=1.3.27.1-2
- Reference
snapshot.debian.net
http://snapshot.debian.net/