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This is a peculiar series of errors but I’m certain that I’m not the first to encounter. If you find yourself in need of the Authen::Libwrap perl library and have tried the usual install mechanisms YUM and CPAN without success then keep reading. the problem is you are missing a few packages not diretly listed in the prerequisites, namely tcp_wrappers, tcp_wrappers-devel, and the perl modules Local::Lib and Test::Exceptions. The Test module is used during the manual build of the Authen::Libwrap module. Soo…

$sudo yum install tcp_wrappers tcp_wrappers-devel
$sudo perl -MCPAN -e install Test::Exceptions
$sudo perl -MCPAN -e install Local::Lib

Then you’ll need to manually build the Authen::Libwrap libraries if your repo doesn’t have them:
$cd Authen-Libwrap-0.22 && perl Makefile.PL && make
$make test
$sudo make install