I am managing a server which has multiple cron tasks, one of the crontab entry is like below:
51 */2 * * * /root/backup.sh
can anyone explain me what is happening here, at what time the script is running?
I want to run one script 20 minutes every hour, and another script every 20 minutes interval, how will I accomplish it?
Also, I want to run my third cron for 20 or 30 minutes, then it will stop, will resume again next hour, or every two or three hours, run again for 20 minutes, then stop, can I do this?