Difference between revisions of "Crontab Add"
From MS Computech
| (4 intermediate revisions by the same user not shown) | |||
| Line 9: | Line 9: | ||
/path/to/command – Script or command name to schedule | /path/to/command – Script or command name to schedule | ||
Easy to remember format: | Easy to remember format: | ||
| + | |||
| + | # .---------------- 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 | ||
* * * * * command to be executed | * * * * * command to be executed | ||
| − | + | ||
| − | | | | | | | + | # | | | | | |
| − | | | | | ----- Day of week (0 - 7) (Sunday=0 or 7) | + | # | | | | ----- Day of week (0 - 7) (Sunday=0 or 7) |
| − | | | | ------- Month (1 - 12) | + | # | | | ------- Month (1 - 12) |
| − | | | --------- Day of month (1 - 31) | + | # | | --------- Day of month (1 - 31) |
| − | | ----------- Hour (0 - 23) | + | # | ----------- Hour (0 - 23) |
| − | ------------- Minute (0 - 59) | + | # ------------- Minute (0 - 59) |
</pre> | </pre> | ||
Example | Example | ||
| − | Run every minute | + | Run every minute. |
| − | <pre>crontab -e </pre><pre> | + | <pre>crontab -e </pre> |
| + | <pre>* * * * * /usr/bin/iptrafvol.pl -l </pre> | ||
| + | Run every midnight | ||
| + | <pre>0 0 * * * /path/to/command</pre> | ||
Run every 2 AM | Run every 2 AM | ||
| − | <pre>0 2 * * * * /usr/sbin/ccsquid</pre> | + | <pre>0 2 * * * /usr/sbin/ccsquid</pre> |
| + | 30 minute after 3 AM | ||
| + | <pre>30 3 * * * /usr/sbin/ccsquid</pre> | ||
Latest revision as of 09:58, 30 March 2016
Crontab Add type
1: Minute (0-59) 2: Hours (0-23) 3: Day (0-31) 4: Month (0-12 [12 == December]) 5: Day of the week(0-7 [7 or 0 == sunday]) /path/to/command – Script or command name to schedule Easy to remember format: # .---------------- 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 * * * * * command to be executed # | | | | | # | | | | ----- Day of week (0 - 7) (Sunday=0 or 7) # | | | ------- Month (1 - 12) # | | --------- Day of month (1 - 31) # | ----------- Hour (0 - 23) # ------------- Minute (0 - 59)
Example Run every minute.
crontab -e
* * * * * /usr/bin/iptrafvol.pl -l
Run every midnight
0 0 * * * /path/to/command
Run every 2 AM
0 2 * * * /usr/sbin/ccsquid
30 minute after 3 AM
30 3 * * * /usr/sbin/ccsquid
