Probleme d'installion des packages

Bonjour, j'ai essayer a installer nagios 3 mais chaque fois que je tape la commande apt-get update ou apt-get install nagios3 j ai rencontré cette probleme

apt-get install nagios3
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
bsd-mailx libgssglue1 libjs-jquery libmysqlclient18 libnet-snmp-perl libpq5
libradius1 libtirpc1 mysql-common nagios-images nagios-plugins
nagios-plugins-basic nagios-plugins-common nagios-plugins-standard
nagios3-cgi nagios3-common nagios3-core postfix rpcbind snmp whois
Suggested packages:
javascript-common libcrypt-des-perl nagios-nrpe-plugin procmail
postfix-mysql postfix-pgsql postfix-ldap postfix-pcre sasl2-bin
dovecot-common postfix-cdb postfix-doc
The following NEW packages will be installed:
bsd-mailx libgssglue1 libjs-jquery libmysqlclient18 libnet-snmp-perl libpq5
libradius1 libtirpc1 mysql-common nagios-images nagios-plugins
nagios-plugins-basic nagios-plugins-common nagios-plugins-standard nagios3
nagios3-cgi nagios3-common nagios3-core postfix rpcbind snmp whois
0 upgraded, 22 newly installed, 0 to remove and 0 not upgraded.
Need to get 8 198 kB of archives.
After this operation, 23,7 MB of additional disk space will be used.
Do you want to continue [Y/n]? y
WARNING: The following packages cannot be authenticated!
libgssglue1 mysql-common libmysqlclient18 libtirpc1 rpcbind
nagios-plugins-common nagios-plugins-basic postfix bsd-mailx libjs-jquery
libnet-snmp-perl libpq5 nagios-images nagios3-common nagios3-cgi
nagios3-core nagios3 snmp whois libradius1 nagios-plugins-standard
nagios-plugins
Install these packages without verification [y/N]? y
Err http://ftp.ds.karen.hj.se/ubuntu/ raring/main libgssglue1 i386 0.4-2
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring/main libtirpc1 i386 0.2.2-5build1
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring/main rpcbind i386 0.2.0-8ubuntu1
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring/main nagios-plugins-common i386 1.4.16-1ubuntu3
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring/main nagios-plugins-basic i386 1.4.16-1ubuntu3
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring/main postfix i386 2.10.0-3
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring/main bsd-mailx i386 8.1.2-0.20111106cvs-1ubuntu1
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring/main libjs-jquery all 1.7.2+debian-1ubuntu1
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring/main libnet-snmp-perl all 6.0.1-2
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring-updates/main libpq5 i386 9.1.11-0ubuntu0.13.04
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring/main nagios-images all 0.7
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring/main nagios3-common all 3.4.1-3
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring/main nagios3-cgi i386 3.4.1-3
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring/main nagios3-core i386 3.4.1-3
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring/main nagios3 i386 3.4.1-3
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring/main snmp i386 5.4.3~dfsg-2.7ubuntu1
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring/main whois i386 5.0.20ubuntu1
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring/main libradius1 i386 0.3.2-14build1
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring/main nagios-plugins-standard i386 1.4.16-1ubuntu3
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring/main nagios-plugins all 1.4.16-1ubuntu3
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring-security/main mysql-common all 5.5.34-0ubuntu0.13.04.1
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Err http://ftp.ds.karen.hj.se/ubuntu/ raring-security/main libmysqlclient18 i386 5.5.34-0ubuntu0.13.04.1
Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/libg/libgssglue/libgssglue1_0.4-2_i386.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/m/mysql-5.5/mysql-common_5.5.34-0ubuntu0.13.04.1_all.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/m/mysql-5.5/libmysqlclient18_5.5.34-0ubuntu0.13.04.1_i386.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/libt/libtirpc/libtirpc1_0.2.2-5build1_i386.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/r/rpcbind/rpcbind_0.2.0-8ubuntu1_i386.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/n/nagios-plugins/nagios-plugins-common_1.4.16-1ubuntu3_i386.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/n/nagios-plugins/nagios-plugins-basic_1.4.16-1ubuntu3_i386.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/p/postfix/postfix_2.10.0-3_i386.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/b/bsd-mailx/bsd-mailx_8.1.2-0.20111106cvs-1ubuntu1_i386.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/j/jquery/libjs-jquery_1.7.2+debian-1ubuntu1_all.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/libn/libnet-snmp-perl/libnet-snmp-perl_6.0.1-2_all.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/p/postgresql-9.1/libpq5_9.1.11-0ubuntu0.13.04_i386.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/n/nagios-images/nagios-images_0.7_all.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/n/nagios3/nagios3-common_3.4.1-3_all.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/n/nagios3/nagios3-cgi_3.4.1-3_i386.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/n/nagios3/nagios3-core_3.4.1-3_i386.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/n/nagios3/nagios3_3.4.1-3_i386.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/n/net-snmp/snmp_5.4.3~dfsg-2.7ubuntu1_i386.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/w/whois/whois_5.0.20ubuntu1_i386.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/r/radiusclient/libradius1_0.3.2-14build1_i386.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/n/nagios-plugins/nagios-plugins-standard_1.4.16-1ubuntu3_i386.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
Failed to fetch http://ftp.ds.karen.hj.se/ubuntu/pool/main/n/nagios-plugins/nagios-plugins_1.4.16-1ubuntu3_all.deb Something wicked happened resolving 'ftp.ds.karen.hj.se:http' (-11 - System error)
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
root@dell:~#