[CentOS] Cron Job?

Hi All,

How does one create a cron job that runs commands like:

/usr/local/awstats/wwwroot/cgi-bin/awstats.pl -config=xxx.com -update
/usr/local/awstats/wwwroot/cgi-bin/awstats.pl -config=yyy.com -update

Say every 15 mins?

-Jason