Solved

How to use Cron command

Posted on 1997-12-01
5
253 Views
Last Modified: 2013-12-26
I have to automate the execution of a program into
my server and I would like to know how to use
the Cron command in order to do this from a web site
directory (I have I vortual server hosted on a Sun
station working with OS Sun solaris 2.5
0
Comment
Question by:italnet
  • 2
  • 2
5 Comments
 

Author Comment

by:italnet
ID: 1295705
Edited text of question
0
 

Accepted Solution

by:
xilef earned 20 total points
ID: 1295706
Use the command "crontab -e" to edit your cronfile (the file which contains the commands to execute at given times). The cronfile then consists of as many lines as you want with the following format:
m h dm m dw command
Where
 m = minute
 h = hour
 dm = day of the month
 m = month
 dw = day of the week
 command = the command you want to execute
Now, replace the characters above with values when you want your command to be executed. If you want to execute something every hour, write:
0 * * * * /path/to/my/command
If you want to execute something every 15 minutes, write:
0,15,30,45 * * * * mycommand

For more information, see the man page of the crontab-command.

0
 
LVL 2

Expert Comment

by:gormenghast
ID: 1295707
Hi...

Before you use crontab -e you may want to set your default editor to whatever you want to use...for example:

# EDITOR=vi
# export EDITOR

Also dont put any blank lines in the crontab file ## comments are ok.


0
 

Author Comment

by:italnet
ID: 1295708
Hi,
Crontab does not respond to my query.
I followed all directions both  from you and
from other infos I found online....No results.
Where the mistake is?
1) I created following file txt
    0,15,30,45 * * * * /to/my/dir/file
2) [telnet] crontab filename.txt   (OK)
3) [telnet] crontab -l  (OK I listed the file)
4) [telnet] crontab run (and I receive an e-mail
    which inform on job execution but....
    he was unable to locate .cfg file
    (it is the config file of the program which
     I want to be execute. This is a strange story
     as this config file is in the same dir of  the
     program file and when I run it directly
     on telnet all works fine!)
Do you have suggestions?

0
 

Expert Comment

by:xilef
ID: 1295709
You should probably first "cd" to this directory. Make a small script which contains "cd /path/to/your/progrm/; ./program".

This way, everything should work.

0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction: Finishing the grid – keyboard support for arrow keys to manoeuvre, entering the numbers.  The PreTranslateMessage function is to be used to intercept and respond to keyboard events. Continuing from the fourth article about sudoku. …
Exception Handling is in the core of any application that is able to dignify its name. In this article, I'll guide you through the process of writing a DRY (Don't Repeat Yourself) Exception Handling mechanism, using Aspect Oriented Programming.
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…

828 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question