Linux as the Backbone of Kubernetes and Hadoop Ecosystems

Linux Cron utility is an effective way to schedule a routine background job at a specific time and/or day on an on-going basis.   Linux Crontab Format MIN HOUR DOM MON DOW CMD Table: Crontab Fields and Allowed Ranges (Linux Crontab Syntax) Field Description Allowed Value MIN Minute field 0 to 59 HOUR Hour field 0 to 23 DOM Day of Month 1-31 MON Month field 1-12 DOW Day Of Week 0-6 CMD Command Any command to be executed. Scheduling a Job For a Specific Time Every Day The basic usage of cron is to execute a job in a specific time as shown below. This will execute the Full backup shell script (full-backup) on 10th June 08:30 AM . Please note that the time field uses 24 hours format. So, for 8 AM use 8, and for 8 PM use 20. 30 08 10 06 * /home/Sadeek/full-backup 30 – 30th Minute 08 – 08 AM 10 – 10th Day 06 – 6th Month (June) * – Every day of the week Schedule a Job For More Than One Instance (Twice a Day) The following script take a incremental b...