conosci un url di reposity apt per fedora 4, probabilmente il problema sta li:
[root@localhost matteo]# apt-get install synaptic
Lettura della lista di pacchetti... Done
Calcolo dell'albero delle dipendenze... Done
Verranno installati i seguenti pacchetti extra:
apt (0.5.15cnc7-57.rhfc4.at)
atrpms-package-config (103-1.rhfc4.at)
Verranno aggiornati i seguenti pacchetti
apt (0.5.15cnc7-6.fc4 => 0.5.15cnc7-57.rhfc4.at)
Saranno installati i seguenti pacchetti NUOVI:
atrpms-package-config (103-1.rhfc4.at)
synaptic (0.57-22.rhfc4.at)
1 upgraded, 2 newly installed, 0 removed and 206 not upgraded.
Need to get 3195kB of archives.
After unpacking 6428kB of additional disk space will be used.
Vuoi proseguire? [S/n] s
Get:1 http://apt.atrpms.net fedora/4/en/i386/at-stable atrpms-package-config 103-1.rhfc4.at [11,1kB]
Get:2 http://apt.atrpms.net fedora/4/en/i386/at-stable apt 1:0.5.15cnc7-57.rhfc4.at [1507kB]
Get:3 http://apt.atrpms.net fedora/4/en/i386/at-stable synaptic 0.57-22.rhfc4.at [1677kB]
Fetched 3195kB in 5s (542kB/s)
Checking GPG signatures... ########################################### [100%]
E: Unknown signature /var/cache/apt/archives/atrpms-package-config_103-1.rhfc4.at_i386.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#66534c2b)
E: Unknown signature /var/cache/apt/archives/apt_1%3a0.5.15cnc7-57.rhfc4.at_i386.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#66534c2b)
E: Unknown signature /var/cache/apt/archives/synaptic_0.57-22.rhfc4.at_i386.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#66534c2b)
E: Error(s) while checking package signatures:
0 unsigned package(s)
3 package(s) with unknown signatures
0 package(s) with illegal/corrupted signatures
E: Handler silently failed
su google non ho trovato..
grazie come sempre