|MIN||Minute field||0 to 59||This tell at what minute of the hour command will execute.|
|HOUR||Hour Field||0 to 23||This tell at what hour command will execute.|
|DOM||Day Of Month Field||1 to 31||This is Day of Month, that you want command to execute.|
|MONTH||Month Field||1 to 12||This is the month a specified command will execute.|
|DOW||Day Of Week Field||0 to 6||This is the Day of Week that you want a command to execute|
|COMMAND||Command Field||Command to be executed||Command/Name of the script file to be executed|
* * * * * /usr/bin/script_file.sh - - - - - - | | | | | | | | | | | --> script/command to be executed | | | | ----> Day of week (0 - 6) (Sunday=0) | | | ------> Month (1 - 12) | | --------> Day of month (1 - 31) | ----------> Hour (0 - 23) ------------> Minute (0 - 59)
crontab -lTo view crontab entries of other user use below command.
crontab -u username -l
0 4 * * * /usr/bin/script.sh
0 4,16 * * * /usr/bin/script.sh
0 22 * * 0 /usr/bin/script.sh
0 */6 * * * /usr/bin/script.sh
0 9 * * 1,3,5 /usr/bin/script.sh
* * * * * /usr/bin/script1.sh; /usr/bin/script2.sh
* * * * * /usr/bin/script.sh > /var/log/cron.logIf you would like to append the output at the end of the file instead of a complete rewrite, use double closing bracket (>>) instead:
* * * * * /usr/bin/script.sh >> /var/log/cron.log
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