Get:49 http://mirror.cse.iitk.ac.in precise-updates/main Translation-en [400 kB]
Get:50 http://mirror.cse.iitk.ac.in precise-updates/universe Translation-en [160 kB]
Fetched 28.1 MB in 2min 1s (231 kB/s)
W: Failed to fetch http://mirror.cse.iitk.ac.in/ubuntu/dists/precise-updates/main/i18n/Translation-en  Hash Sum mismatch

W: Failed to fetch http://mirror.cse.iitk.ac.in/ubuntu/dists/precise-updates/universe/i18n/Translation-en  Hash Sum mismatch

E: Some index files failed to download. They have been ignored, or old ones used instead.
[ece-install-477] The command <apt-get update> run as user root FAILED (the command exited with code 100), I'll exit now :-(