From 593144ee6376dbe64e78baf556d052384ce4aa3f Mon Sep 17 00:00:00 2001
From: RadinPirouz <pirouz.radin@yahoo.com>
Date: Sun, 10 Mar 2024 16:22:18 +0330
Subject: [PATCH] cronjob doc

---
 CronJob/CronJob.md | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 CronJob/CronJob.md

diff --git a/CronJob/CronJob.md b/CronJob/CronJob.md
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+```txt
+ .---------------- minute (0 - 59)
+ |  .------------- hour (0 - 23)
+ |  |  .---------- day of month (1 - 31)
+ |  |  |  .------- month (1 - 12) OR jan,feb,mar,apr ...
+ |  |  |  |  .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
+ |  |  |  |  |
+ *  *  *  *  * user-name command to be executed
+```
+Here are some examples to illustrate different cron job schedules:
+
+### Example 1: Run at 12:55 every day
+```
+55 12 * * * root hi
+```
+This command runs `hi` as the `root` user every day at 12:55.
+
+### Example 2: Run every minute
+```
+*/1 * * * * root hi
+```
+This command runs `hi` as the `root` user every minute.
+
+### Example 3: Run every 2 minutes
+```
+*/2 * * * * root hi
+```
+This command runs `hi` as the `root` user every 2 minutes.
+
+### Example 4: Run at specific minutes
+``` 
+10,20,30 10 * * * root hi
+```
+This command runs `hi` as the `root` user at 10:10, 10:20, and 10:30.
+
+### Example 5: Run after every reboot
+```
+@reboot root hi
+```
+This command runs `hi` as the `root` user after system reboot.