Hi All,
I have created 2 shell scripts and set Cron jobs which runs it at various frequencies.The first one which runs every 2 minutes Monday to Friday and another cron job runs at 11PM on the last Sunday of every month. I have given the cron job entries below.
Was wondering whether instead hard coding the parameter values meant for the shell script in the crontab whether it was ok to set them as unix level environment variable or something and then use them instead in the cron job.
I think it will make the cron job make cleaner as well as more easily manageable.
My DBA says to use a “config” file to contain all the parameters that I need to pass on to the script
What are your thoughts on this?.If I have to go the config file way, what do i need to do as i have don't know much about creating/updating config files...
Just I'm trying to find script, which will do the following job:
1. as a CRON-Job it shoult
a) delete files which will be either older than 24 hours or
b) all files within
a) a directory deleting recursive
b) only a special directory.
2. write an error-/Delete_log... (9 Replies)
I run cron in solaris 10 zone. One cron job which syncing files to nfs mounted on container, creates after finishing another cron proccess(/usr/sbin/cron), and after 100 existing cron proccesses next cron job will not start. It's too weird for me, I'm not able to solve this problem. Theoretically... (3 Replies)
Hi everyone! I'm sorry, I'm a total noob but would really appreciate any advice or help. I want to create a cron job that would run every hour and would look inside a few different folders. If any new files were created within those folders within the last hour they would be destroyed, but any... (2 Replies)
Hi I am new to shell scripting. There is a requirement to write a shell script to meet follwing needs.Prompt reply shall be highly appreciated.
script that will compare two config files and produce 2 outputs - actual config file and a report indicating changes made.
OS :Susi linux ver 10.3.
... (4 Replies)
I wrote a quick little script that will eventually end up as a cron job to export rrd files for my cacti server.
Here is the script:
#!/bin/bash
rm -rf /backup/cacti_xml/*
cd /var/www/html/rra
ls -1 *.rrd | awk '{print "rrdtool dump "$1" > /backup/cacti_xml/"$1".xml"}' | sh -x
Is there... (5 Replies)
i have a text file in this format: which creates a new one everyday in the form of filename _zing__r200_2012_8_10_log.txt
Fri Aug 10 07:29:17 EDT 2012, usera(192.168.0.245) to anotheruser: hey top, this is a private test
Fri Aug 10 07:29:28 EDT 2012, anotheruser(192.168.0.245) to usera: got... (2 Replies)
Hi ,
I have removed a cron for particular user , but cron job seems to be running even after the cron entry is removed. The purpose of the cron was to sendmail to user ( it uses mailx utility )
I have restarted cron and sendmail service still user is getting mail alerts from the cron job. And... (4 Replies)
Hi,
1)
If some job supposed to run on 1st of every month at 7 AM
In cron job when we have a blackout on the 1st ( i.e when 1st falls on a sunday ) how can we make the job run the next business day?
2) How can we run a job on 25th of every quarter 7 AM(jan,apr,jul,oct)
And if 25th... (5 Replies)
I'm new to shell scripting, and I want to set up a cron job that scans the date/time stamp of all files in a directory, and then if any file is, say, less than 10 minutes old, I want it to execute a command on that file. What would be the best way to go about this? Thanks.
Not sure if it makes a... (1 Reply)
Discussion started by: DavidHoffman
1 Replies
LEARN ABOUT BSD
cron
CRON(8) System Manager's Manual CRON(8)NAME
cron - clock daemon
SYNOPSIS
/usr/sbin/cron
DESCRIPTION
Cron executes commands at specified dates and times according to the instructions in the files /etc/crontab and /etc/crontab.local. None,
either one, or both of these files may be present. Since cron never exits, it should only be executed once. This is best done by running
cron from the initialization process through the file /etc/rc; see init(8).
The crontab files consist of lines of seven fields each. The fields are separated by spaces or tabs. The first five are integer patterns
to specify:
o minute (0-59)
o hour (0-23)
o day of the month (1-31)
o month of the year (1-12)
o day of the week (1-7 with 1 = Monday)
Each of these patterns may contain:
o a number in the range above
o two numbers separated by a minus meaning a range inclusive
o a list of numbers separated by commas meaning any of the numbers
o an asterisk meaning all legal values
The sixth field is a user name: the command will be run with that user's uid and permissions. The seventh field consists of all the text
on a line following the sixth field, including spaces and tabs; this text is treated as a command which is executed by the Shell at the
specified times. A percent character (``%'') in this field is translated to a new-line character.
Both crontab files are checked by cron every minute, on the minute.
FILES
/etc/crontab
/etc/crontab.local
7th Edition October 23, 1996 CRON(8)