trying to have webalizer run every 30 minutes: opening crontab: crontab -e then putting in de line: * */30 * * * /usr/bin/webalizer is this correct?
For the default vhost this should work, but minutes are the first column in cron, so I guess you mean */30 * * * *. If you want to create statistics for websites, then you should call webalizer with parameters to tell it which config to use and where it can find the log file and where to write the statistics files.