I cannot install some softwares. The reason being ..the packages are unsigned!! How do I install unsigned packages with apt-get? COPPERSKULL:~ # apt-get install kynaptic Reading Package Lists... Done Building Dependency Tree... Done The following NEW packages will be installed: kynaptic 0 upgraded, 1 newly installed, 0 removed and 209 not upgraded. Need to get 1964kB of archives. After unpacking 5737kB of additional disk space will be used. Get:1 ftp://ftp4.gwdg.de SuSE/10.0-i386/suser-agirardet kynaptic 0.5-9.1709.SUPER [1964kB] Fetched 1964kB in 5m34s (5867B/s) Checking GPG signatures... Unsigned /var/cache/apt/archives/kynaptic_0.5-9.1709.SUPER_i586.rpm: sha1 md5 OK E: Error(s) while checking package signatures: 1 unsigned package(s) 0 package(s) with unknown signatures 0 package(s) with illegal/corrupted signatures E: Handler silently failed -- http://mckagan.googlepages.com