Install these packages without verification [y/N]? y
Err http://it.archive.ubuntu.com/ubuntu/ oneiric/main m4 i386 1.4.16-1
  404  Not Found
Err http://it.archive.ubuntu.com/ubuntu/ oneiric/main autoconf all 2.68-1ubuntu1
  404  Not Found
Err http://it.archive.ubuntu.com/ubuntu/ oneiric/main autotools-dev all 20110511.1
  404  Not Found
Err http://it.archive.ubuntu.com/ubuntu/ oneiric/main automake all 1:1.11.1-1ubuntu1
  404  Not Found
Failed to fetch http://it.archive.ubuntu.com/ubuntu/pool/main/m/m4/m4_1.4.16-1_i386.deb  404  Not Found
Failed to fetch http://it.archive.ubuntu.com/ubuntu/pool/main/a/autoconf/autoconf_2.68-1ubuntu1_all.deb  404  Not Found
Failed to fetch http://it.archive.ubuntu.com/ubuntu/pool/main/a/autotools-dev/autotools-dev_20110511.1_all.deb  404  Not Found
Failed to fetch http://it.archive.ubuntu.com/ubuntu/pool/main/a/automake1.11/automake_1.11.1-1ubuntu1_all.deb  404  Not Found
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?