Xenforo Configurable job run trigger xf2.2 (server based trigger)

use crontab -l to view current cronjobs and crontab -e command to invoke nano text editor see guide at HowTo: Add Jobs To cron Under Linux or UNIX?

example of out of box centmin mod setup cronjobs excluding wordpress wp-cli

Code (Text):

crontab -l
13 23 * * * /usr/local/src/centminmod/tools/autoprotect.sh >/dev/null 2>&1
0 */4 * * * /usr/bin/cminfo_updater 2>/dev/null

 

did you read How To Add Jobs To cron Under Linux or UNIX - nixCraft

also online there's cronjob generators for the syntax Crontab Generator - Generate crontab syntax