cron linux example

Example 1: cron example

crontab -e						# to edit
10 * * * * /bin/sh backup.sh    # every hour at 10"
0 */4 * * * /bin/sh backup.sh   # every 4 hours at 0"
0 9-17 * * * /bin/sh backup.sh  # every hour at 0" between 9 and 17
0 2 * * * /bin/sh backup.sh     # daily at 2am
0 0 * * MON /bin/sh backup.sh   # every Monday at 0am
0 0 * * 1-5 /bin/sh backup.sh   # daily from Monday to Friday at 0am
0 0 * * 0 /bin/sh backup.sh     # weekly on Sunday
0 0 1 * * /bin/sh backup.sh     # monthly (1rst day at 0am)
0 0 1 */3 * /bin/sh backup.sh   # every quarter (1rst day at 0am)
0 0 1 1 * /bin/sh backup.sh     # yearly (01/01)

Example 2: cronjob example

//Specify cron frequency
//e.g. run minute 0, every hour
0 */1 * * *
//enter a bash command to the script input field
//e.g. a wget command where the output isn't saved
wget -O- url_here >> /dev/null