I am getting this when install I tried to serach the following keys on other server but could not find it on other pgp key server Err http://nebc.nerc.ac.uk unstable Release.gpg Unable to connect to nebc.nerc.ac.uk:http: Ign http://nebc.nerc.ac.uk unstable Release Ign http://nebc.nerc.ac.uk unstable/bio-linux TranslationIndex Err http://nebc.nerc.ac.uk unstable/bio-linux amd64 Packages Unable to connect to nebc.nerc.ac.uk:http: Err http://nebc.nerc.ac.uk unstable/bio-linux i386 Packages Unable to connect to nebc.nerc.ac.uk:http: Err http://nebc.nerc.ac.uk unstable/bio-linux Translation-en_US Unable to connect to nebc.nerc.ac.uk:http: Err http://nebc.nerc.ac.uk unstable/bio-linux Translation-en Unable to connect to nebc.nerc.ac.uk:http: Ign http://downloads-distro.mongodb.org dist/10gen Translation-en Fetched 316 B in 3s (99 B/s) W: There is no public key available for the following key IDs: 3B4FE6ACC0B21F32 W: GPG error: http://ppa.launchpad.net precise Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 759A8E0E5BA15160 W: There is no public key available for the following key IDs: 3B4FE6ACC0B21F32 W: There is no public key available for the following key IDs: 3B4FE6ACC0B21F32 W: Failed to fetch http://nebc.nerc.ac.uk/bio-linux/dists/unstable/Release.gpg Unable to connect to nebc.nerc.ac.uk:http: W: Failed to fetch http://nebc.nerc.ac.uk/bio-linux/dists/unstable/bio-linux/binary-amd64/Packa... Unable to connect to nebc.nerc.ac.uk: http: W: Failed to fetch http://nebc.nerc.ac.uk/bio-linux/dists/unstable/bio-linux/binary-i386/Packag... Unable to connect to nebc.nerc.ac.uk: http: W: Failed to fetch http://nebc.nerc.ac.uk/bio-linux/dists/unstable/bio-linux/i18n/Translation-e... Unable to connect to nebc.nerc.ac.uk: http: W: Failed to fetch http://nebc.nerc.ac.uk/bio-linux/dists/unstable/bio-linux/i18n/Translation-e... Unable to connect to nebc.nerc.ac.uk: http: -- Regards Zeeshan Ali Shah System Administrator - PDC HPC PhD researcher (IT security) Kungliga Tekniska Hogskolan +46 8 790 9115 http://www.pdc.kth.se/members/zashah