I have implemented Nagios, and wanted to run this perl script to interrogate my Oracle systems. This really isn't a coding question, but rather a setup or execution question. I would like to understand why I am getting the following error when I run check_oracle_instance.pl natively from the linux shell: serv:~ > ./check_oracle_instance.pl -u nagios -p password -c mwm -t 51/55 DBD::Oracle initialisation failed: Can't locate object method "driver" via package "DBD::Oracle" at /usr/lib/perl5/vendor_perl/5.8.3/x86_64-linux-thread-multi/DBI.pm line 731. Perhaps the capitalisation of DBD 'Oracle' isn't right. at ./check_oracle_instance.pl line 157 serv:~ > I'm sure some perl guru knows exactly what is wrong here, and could point me in the right direction. Cheers