[root@test]# perl -MCPAN -e 'install DBD::mysql'
Can't locate CPAN.pm in @INC (@INC contains: /usr/local/lib/perl5 /usr/local/share/perl5 /usr/lib/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib/perl5 /usr/share/perl5 .).
BEGIN failed--compilation aborted.
解决办法：
yum -y install cpan