Um comando errado (crontab -r -u root)  na edição (crontab -e -u root) das tarefas crontab pode ser um desastre. Para minimizar os seus problemas caso você apague as tarefas padrões do usuário root, copie abaixo todas as tarefas do cPanel que são habilitadas por padrão até hoje (29/08/2009):

0 1 * * * /scripts/cpbackup
*/15 * * * * /usr/local/cpanel/whostmgr/bin/dnsqueue > /dev/null 2>&1
2,58 * * * * /usr/local/bandmin/bandmin
0 0 * * * /usr/local/bandmin/ipaddrmap
30 21 * * * /usr/local/cpanel/whostmgr/docroot/cgi/cpaddons_report.pl --notify
0 6 * * * /scripts/exim_tidydb > /dev/null 2>&1
*/5 * * * * /usr/local/cpanel/bin/dcpumon >/dev/null 2>&1
35 * * * * /usr/bin/test -x /usr/local/cpanel/bin/tail-check && /usr/local/cpanel/bin/tail-check
2 0 * * * /scripts/upcp
0 1 * * * /scripts/cpbackup
*/15 * * * * /usr/local/cpanel/whostmgr/bin/dnsqueue > /dev/null 2>&1
2,58 * * * * /usr/local/bandmin/bandmin
0 0 * * * /usr/local/bandmin/ipaddrmap
30 21 * * * /usr/local/cpanel/whostmgr/docroot/cgi/cpaddons_report.pl --notify
0 6 * * * /scripts/exim_tidydb > /dev/null 2>&1
*/5 * * * * /usr/local/cpanel/bin/dcpumon >/dev/null 2>&1
35 * * * * /usr/bin/test -x /usr/local/cpanel/bin/tail-check && /usr/local/cpanel/bin/tail-check

Até a próxima!