If I were doing this, I'd kick off a script at 18:40, just once, and let it run your programme/script every three minutes until midnight.
Your crontab entry would be simple:
If the command you are running takes several minutes to run, and you want it to start right at the next three minute mark, run it asynchronously (use &) so that the waking from the sleep is 3 minutes from when the programme started and not three minutes from when the programme ended.
Last edited by agama; 10-19-2011 at 08:55 PM..
Reason: clarification
I want to know if there is a way to make a certain set of programs start in order at system startup with cron or something else i dont know about. (3 Replies)
Hi,
can you please help me with one problem?
There is some server, there are a lot of AIX applications which run on this server under different UserIDs.
These applications starts via crontab.
From time to time some application doesn't start.
What can this "not-action" be dependent on?
At... (5 Replies)
Hello,
I would like setup a CRON job to rename my server's name (host name) every day. For some reason it changes its own name every couple days to server-2.local fron server.local.
Thank you!
-Chris (3 Replies)
Is there anyway to get the start time and end time / status of a crontab job which was just completed? Of course, we know the start time of the crontab job since we are scheduling. But I would like to know process start and time recorded somewhere or can be fetched from a command like 'ps'. ... (3 Replies)
Hello All,
I have a problem calculating the time difference between start and end timings...!
the timings are given by 24hr format..
Start Date : 08/05/10 12:55
End Date : 08/09/10 06:50
above values are in mm/dd/yy hh:mm format.
Now the thing is, 7th(08/07/10) and... (16 Replies)
HI I am new to unix .
I wanted to create a cron job that runs a script every 10 min .So when I enter
vi /etc/crontab
I get the following output
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root
HOME=/
# run-parts
01 * * * * root run-parts /etc/cron.hourly
02 4 * *... (1 Reply)
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've created a script to copy backup files from an HP-UX 11iv3 system to an NFS share on another machine. I want to schedule the script to run via cron. The script is simply three lines of cp /backups/Backup /shared/Backup. I've saved the script as a .sh file and call it with KSH. Do I need to... (3 Replies)
Discussion started by: jduehmig
3 Replies
LEARN ABOUT NETBSD
sleep
SLEEP(1) BSD General Commands Manual SLEEP(1)NAME
sleep -- suspend execution for an interval of time
SYNOPSIS
sleep seconds
DESCRIPTION
The sleep utility suspends execution for a minimum of seconds. It is usually used to schedule the execution of other commands (see EXAMPLES
below).
Note: The NetBSD sleep command will accept and honor a non-integer number of specified seconds. This is a non-portable extension, and its
use will nearly guarantee that a shell script will not execute properly on another system.
When the SIGINFO signal is received, the estimate of the amount of seconds left to sleep is printed on the standard output.
EXIT STATUS
The sleep utility exits with one of the following values:
0 On successful completion, or if the signal SIGALRM was received.
>0 An error occurred.
EXAMPLES
To schedule the execution of a command for 1800 seconds later:
(sleep 1800; sh command_file >& errors)&
This incantation would wait half an hour before running the script command_file. (See the at(1) utility.)
To reiteratively run a command (with csh(1)):
while (1)
if (! -r zzz.rawdata) then
sleep 300
else
foreach i (*.rawdata)
sleep 70
awk -f collapse_data $i >> results
end
break
endif
end
The scenario for a script such as this might be: a program currently running is taking longer than expected to process a series of files, and
it would be nice to have another program start processing the files created by the first program as soon as it is finished (when zzz.rawdata
is created). The script checks every five minutes for the file zzz.rawdata, when the file is found, then another portion processing is done
courteously by sleeping for 70 seconds in between each awk job.
SEE ALSO at(1), nanosleep(2), sleep(3)STANDARDS
The sleep command is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.
BSD August 13, 2011 BSD