Dear Friends, I got following error when updating Ubuntu repositories before Koha upgradation. My Koha run on Ubuntu 12.04 and Koha version is 3.12.11. I added again again key, but got the same error. How can we overcome this problem? Fetched 3,906 kB in 12s (305 kB/s) W: Failed to fetch gzip:/var/lib/apt/lists/partial/debian.koha-community.org_koha_dists_oldstable_main_binary-amd64_Packages Hash Sum mismatch W: Failed to fetch gzip:/var/lib/apt/lists/partial/debian.koha-community.org_koha_dists_oldstable_main_binary-i386_Packages Hash Sum mismatch E: Some index files failed to download. They have been ignored, or old ones used instead. Regards, -- Vimal Kumar V. Technical Assistant Mahatma Gandhi University Library Kottayam, Kerala- 686 560 Web: http://www.vimalkumar.info Blog: http://linuxhalwa.blogspot.com http://kohageek.blogspot.in http://moovandan.blogspot.in --------------------------------------------------------------------------- "I forget what I was taught. I only remember what I have learnt" -Patrick White