Twin directories of os:

[DIR]  ftp://ftp.uni-leipzig.de/pub/linux/pub/comp/os/
[DIR]  ftp://ftp.mimuw.edu.pl/mirror/ftp.redhat.com/pub/redhat/linux/6.2/en/os/
[DIR]  ftp://ftp.dit.upm.es/mirrors/ftp.rediris.es/mirror/fedora-legacy/redhat/9/os/
[DIR]  ftp://ftp.dit.upm.es/mirrors/ftp.rediris.es/mirror/fedora-legacy/redhat/8.0/os/
[DIR]  ftp://ftp.dit.upm.es/mirrors/ftp.rediris.es/mirror/fedora-legacy/redhat/7.3/os/
[DIR]  ftp://ftp.dit.upm.es/mirrors/ftp.rediris.es/mirror/fedora-legacy/redhat/7.2/os/
[DIR]  ftp://ftp.dit.upm.es/mirrors/ftp.rediris.es/mirror/fedora-legacy/fedora/4/os/
[DIR]  ftp://ftp.dit.upm.es/mirrors/ftp.rediris.es/mirror/fedora-legacy/fedora/5/os/
[DIR]  ftp://ftp.dit.upm.es/mirrors/ftp.rediris.es/mirror/fedora-legacy/fedora/6/os/
[DIR]  ftp://ftp.dit.upm.es/mirrors/ftp.rediris.es/mirror/fedora-legacy/fedora/3/os/
[DIR]  ftp://ftp.dit.upm.es/mirrors/ftp.rediris.es/mirror/fedora-legacy/fedora/2/os/
[DIR]  ftp://ftp.dit.upm.es/mirrors/ftp.rediris.es/mirror/fedora-legacy/fedora/1/os/
[DIR]  ftp://ftp.unb.ca/pub/EBS/solaris_32/SUNWebsc/reloc/lib/nsr/gls/lc/os/
[DIR]  ftp://ftp.unb.ca/pub/EBS/solaris_64/116832-03/SUNWebsc/reloc/lib/nsr/gls/lc/os/
[DIR]  ftp://ftp.unb.ca/pub/EBS/solaris_64/SUNWebsc/reloc/lib/nsr/gls/lc/os/
[DIR]  ftp://ftp.unb.ca/pub/EBS/solaris_x86/SUNWebsc/reloc/lib/nsr/gls/lc/os/
[DIR]  ftp://ftp.unb.ca/pub/EBS7.2_hotfix/SUNWsbuc/reloc/lib/nsr/gls/lc/os/
[DIR]  ftp://ftp.unb.ca/pub/EBS7.2_hotfix/Solaris/116831-02/SUNWebsc/reloc/lib/nsr/gls/lc/os/
[DIR]  ftp://ftp.unb.ca/pub/EBS7.2_hotfix/Solaris/116832-02/SUNWebsc/reloc/lib/nsr/gls/lc/os/
[DIR]  ftp://ftp.unb.ca/pub/EBS7.2_hotfix/Solaris/LGTOclnt/reloc/lib/nsr/gls/lc/os/
[DIR]  ftp://ftp.unb.ca/pub/SolsticeBackup/SUNWebsc/reloc/lib/nsr/gls/lc/os/
[DIR]  ftp://ftp.unb.ca/pub/helpdesk/os/
[DIR]  ftp://ftp.eenet.ee/arhiiv/apache/perl/mod_perl-2.0.2/docs/os/
[DIR]  ftp://ftp.eenet.ee/arhiiv/apache/perl/mod_perl-2.0.3/docs/os/
[DIR]  ftp://ftp.fi.upm.es/pub/mirror/apache/perl/mod_perl-1.99_09/docs/os/
[DIR]  ftp://ftp.saintjoe.edu/pub/linux/fedora/linux/releases/8/Everything/i386/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/freshrpms/ayo/redhat/7.2/i386/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/freshrpms/ayo/redhat/7.3/i386/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/freshrpms/ayo/redhat/8.0/i386/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/freshrpms/ayo/redhat/9/i386/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/freshrpms/ayo/yellowdog/3.0/ppc/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/freshrpms/ayo/yellowdog/4.0/ppc/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/freshrpms/ayo/redhat/6.2/i386/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/freshrpms/ayo/redhat/7.0/i386/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/freshrpms/ayo/redhat/7.1/i386/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/Mirror/ftp.redhat.com/updates/7.3/en/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/Mirror/ftp.redhat.com/updates/8.0/en/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/Mirror/ftp.redhat.com/updates/9/en/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/Mirror/ftp.redhat.com/fedora/core/development/x86_64/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/Mirror/ftp.redhat.com/fedora/core/test/9-Preview/Fedora/i386/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/Mirror/ftp.redhat.com/fedora/core/test/9-Preview/Fedora/ppc/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/Mirror/ftp.redhat.com/fedora/core/test/9-Preview/Fedora/x86_64/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors/centos/4.7/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/Mirror/ftp.redhat.com/fedora/core/development/ppc64/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/Mirror/ftp.redhat.com/fedora/core/8/Everything/x86_64/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/Mirror/ftp.redhat.com/fedora/core/8/Fedora/i386/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/Mirror/ftp.redhat.com/fedora/core/8/Fedora/ppc/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/Mirror/ftp.redhat.com/fedora/core/8/Fedora/x86_64/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/Mirror/ftp.redhat.com/fedora/core/development/ppc/os/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/unix/linux/Mirror/ftp.redhat.com/fedora/core/8/Everything/ppc64/os/