$ perldoc -l IO::Socket IO::socket CGI No documentation found for "IO::socket". /usr/local/lib/perl5/5.10.1/i686-linux/IO/Socket.pm /usr/local/lib/perl5/5.10.1/CGI.pm $ perl -MIO::socket -e1 Can't locate IO/socket.pm in @INC (@INC contains: /usr/local/lib/perl5/5.10.1/i686-linux /usr/local/lib/perl5/5.10.1 /usr/local/lib/perl5/site_perl/5.10.1/i686-linux /usr/local/lib/perl5/site_perl/5.10.1 .). BEGIN failed--compilation aborted.