A clean up job needs to be run every day. Edit the crontab for user index crontab -u index -e and add the line
39 4 * * * cd /var/www/html/lot/perl; ./cleanup.pl
A script is run every time Z-Spy is run, in order to keep the TLDD's data in sync with Z-Spy's internal data. The following line should be added to the users index's cron
55 23 * * * wget -q -r http://libraryoftexas.com/php/targets_tcl.php
Z-Spy keeps track of all the Z39.50 servers in the TLDD. The following line should be added to the users index's cron
00 00 * * * /var/www/html/zspy/robot/z-spy.tcl -cf /var/www/html/lot/root/zspy/z-spy-lot.cfg