Differences

This shows you the differences between two versions of the page.

--- ubuntu:cron [2019/12/13 00:01] – peter
+++ ubuntu:cron [2021/07/05 21:53] (current) – [Cron] peter
@@ Line 12: / Line 12: @@
 The jobs inside the crontab file are known as cron jobs, and consist of standard Linux commands.  They also contain the time-period when cron needs to execute them.
+<code bash>
+ ┌───────────── minute (0 - 59)
+ │ ┌───────────── hour (0 - 23)
+ │ │ ┌───────────── day of the month (1 - 31)
+ │ │ │ ┌───────────── month (1 - 12)
+ │ │ │ │ ┌───────────── day of the week (0 - 6) (Sunday to Saturday;
+ │ │ │ │ │                                   7 is also Sunday on some systems)
+ │ │ │ │ │
+ │ │ │ │ │
+ * * * * * <command to execute>
+</code>
 {{:ubuntu:crontab-structure.jpg?800|}}
@@ Line 26: / Line 38: @@
 [[Ubuntu:Cron:List Crontab|List Crontab]]
+[[Ubuntu:Cron:Send Cron Results to Specified Email Account|Send Cron Results to Specified Email Account]]
 [[Ubuntu:Cron:Set crontab editor to vim|Set crontab editor to vim]]
@@ Line 66: / Line 80: @@
 [[Ubuntu:Cron:Schedule a Cron Job to Run on Every Three Hours|Schedule a Cron Job to Run on Every Three Hours]]
+[[Ubuntu:Cron:Schedule a Cron Job to Execute Twice on Every Saturday and Monday|Schedule a Cron Job to Execute Twice on Every Saturday and Monday]]
+[[Ubuntu:Cron:Schedule a Cron Job to Run on Every 30 Seconds|Schedule a Cron Job to Run on Every 30 Seconds]]
+[[Ubuntu:Cron:Schedule Multiple Jobs in a Single Crontab Entry|Schedule Multiple Jobs in a Single Crontab Entry]]
+[[Ubuntu:Cron:Schedule Yearly Cron Jobs|Schedule Yearly Cron Jobs]]
+[[Ubuntu:Cron:Schedule Monthly Cron Jobs|Schedule Monthly Cron Jobs]]
+[[Ubuntu:Cron:Schedule Weekly Cron Jobs|Schedule Weekly Cron Jobs]]
+[[Ubuntu:Cron:Schedule Daily Cron Jobs|Schedule Daily Cron Jobs]]
+[[Ubuntu:Cron:Schedule Hourly Cron Jobs|Schedule Hourly Cron Jobs]]
+[[Ubuntu:Cron:Schedule a Cron Job on System Reboot|Schedule a Cron Job on System Reboot]]