$sudo apt-get update
Fetched 1,499 kB in 13s (107 kB/s)
W: Failed to fetch http://debian.datastax.com/enterprise/dists/stable/main/binary-i386/Packages 401 Unauthorized
E: Some index files failed to download. They have been ignored, or old ones used instead
原帖:http ://www.datastax.com/support-forums/topic/datastax-enterprise-installation-error