root@TTS-ubuntu:/var# emacs /etc/apt/sources.list
root@TTS-ubuntu:/var# apt-get update
Get:1 http://security.ubuntu.com natty-security Release.gpg [198B]
Ign http://security.ubuntu.com/ubuntu/ natty-security/main Translation-en
Ign http://security.ubuntu.com/ubuntu/ natty-security/main Translation-en_US
Get:2 http://archive.ubuntu.com natty-updates Release.gpg [198B]
Ign http://archive.ubuntu.com/ubuntu/ natty-updates/main Translation-en
Ign http://security.ubuntu.com/ubuntu/ natty-security/multiverse Translation-en
Ign http://security.ubuntu.com/ubuntu/ natty-security/multiverse Translation-en_US
Ign http://security.ubuntu.com/ubuntu/ natty-security/restricted Translation-en
Ign http://security.ubuntu.com/ubuntu/ natty-security/restricted Translation-en_US
Ign http://security.ubuntu.com/ubuntu/ natty-security/universe Translation-en
Ign http://archive.ubuntu.com/ubuntu/ natty-updates/main Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ natty-updates/multiverse Translation-en
Ign http://archive.ubuntu.com/ubuntu/ natty-updates/multiverse Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ natty-updates/restricted Translation-en
Ign http://archive.ubuntu.com/ubuntu/ natty-updates/restricted Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ natty-updates/universe Translation-en
Ign http://archive.ubuntu.com/ubuntu/ natty-updates/universe Translation-en_US
Get:3 http://archive.ubuntu.com natty Release.gpg [198B]
Ign http://archive.ubuntu.com/ubuntu/ natty/main Translation-en
Ign http://archive.ubuntu.com/ubuntu/ natty/main Translation-en_US
Ign http://security.ubuntu.com/ubuntu/ natty-security/universe Translation-en_US
Get:4 http://security.ubuntu.com natty-security Release [39.8kB]
Ign http://archive.ubuntu.com/ubuntu/ natty/multiverse Translation-en
Ign http://archive.ubuntu.com/ubuntu/ natty/multiverse Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ natty/restricted Translation-en
Ign http://archive.ubuntu.com/ubuntu/ natty/restricted Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ natty/universe Translation-en
Ign http://archive.ubuntu.com/ubuntu/ natty/universe Translation-en_US
Get:5 http://archive.ubuntu.com natty-updates Release [39.8kB]
Get:6 http://security.ubuntu.com natty-security/universe amd64 Packages [101kB]
Get:7 http://archive.ubuntu.com natty Release [39.8kB]
Get:8 http://security.ubuntu.com natty-security/main amd64 Packages [359kB]
Get:9 http://archive.ubuntu.com natty-updates/universe amd64 Packages [159kB]
Get:10 http://security.ubuntu.com natty-security/restricted amd64 Packages [4,778B]
Get:11 http://security.ubuntu.com natty-security/multiverse amd64 Packages [3,546B]
Get:12 http://archive.ubuntu.com natty-updates/main amd64 Packages [490kB]
Get:13 http://archive.ubuntu.com natty-updates/restricted amd64 Packages [6,240B]
Get:14 http://archive.ubuntu.com natty-updates/multiverse amd64 Packages [6,360B]
Ign http://archive.ubuntu.com natty/main amd64 Packages
Ign http://archive.ubuntu.com natty/universe amd64 Packages
Get:15 http://archive.ubuntu.com natty/restricted amd64 Packages [9,001B]
Get:16 http://archive.ubuntu.com natty/multiverse amd64 Packages [181kB]
Ign http://archive.ubuntu.com natty/main amd64 Packages
Ign http://archive.ubuntu.com natty/universe amd64 Packages
Get:17 http://archive.ubuntu.com natty/main amd64 Packages [216B]
Get:18 http://archive.ubuntu.com natty/universe amd64 Packages [220B]
Fetched 1,439kB in 9min 40s (2,479B/s)
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/natty/main/binary-amd64/Packages.gz  Hash Sum mismatch

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/natty/universe/binary-amd64/Packages.gz  Hash Sum mismatch

E: Some index files failed to download, they have been ignored, or old ones used instead.