One step Bugzilla installation

The error message specifies clearly what the problem is. In your localconfig file, there is a setting for the value $webservergroup (which is the Unix group your webserver runs with the permissions of). You have it set to "apache" (which, I believe, is the default) but there is no group in the system with that name. So you need to set it to the true name of the group your webserver runs as.

I am not familiar with bluehost but another common value is "www-data". To find out, do ps aux | grep apache and look at the first column. One may be root, but the next few will be the value you want.

Gerv

Something went wrong with the installation of your DBD driver, obviously.

You should probably install the Perl module from the CentOS repositories directly:

yum install perl-DBD-MySQL

But if you have a specific reason to use the CPAN client to install the module, it needs a build environment (i.e. a C compiler) and also the MySQL C header files on the system. Usually, you would do this by installing two additional packages:

yum install mysql-devel libz-devel

Now you can properly compile the DBD driver.