CentOS timed Python script execution

Linux is actually a timed task . Old can't remember parameters, this time write down, save the old Baidu. This article does not have the technical content, please everybody not to spit the trough.

================================================================

Execute the/opt/aa.py file with Python 4:00:01 every day.

To edit a timed task:

#crontab-E

Join:

0 4 * * * python/opt/aa.py

Save and exit.

================================================================

crontab command format:

* * * * * command
M H d M d command

M: Cents (0-59)
H: Hours (0-23)
D: Day (1-31)
M: Month (1-12)
D: Week (0-6) 0 for Sunday

* Represents a number in the range of values
/on behalf of "every"
-Represents a number to a number
, which represents a discrete value (list of values)

Example:

Execution per minute:

* * * * * * date>>/opt/test.log

Equivalent

*/1 * * * * date>>/opt/test.log

Note that every minute means that the 1th second of every minute begins to execute.

Open a Test.log file and you'll find the result: Sat Oct 14:25:01 CST 2013

Execute every 4 hours:

* */4 * * * date>>/opt/test.log

Executed every Sunday:

* * * * 0 Date>>/opt/test.log

Executed every Saturday and Sunday:

* * * * * 6,0 Date>>/opt/test.log

The first 5 minutes per hour is performed:

5 * * * * date>>/opt/test.log

Very simple, just remember the position and the meaning of the line.

Reference address

CentOS timed Python script execution