1- Copy monika.cgi in a cgi enabled Apache directory.
2- Copy monika directory (with all .pm files) somewhere so that perl can locate those packages at runtime. It may be the same directory where you put monika.cgi, or in one the main perl module directories.
3- Verify that pbsnodes and qstat PBS commands are available.
4- Edit monika.conf either in the directory of the monika.cgi script or in /etc/monika.conf to suit your configuration (see the configuration file which comes with the package, it is well documented). 
5- Test it in your favorite web browser !
