12-21-2016
Don't forget, you should be using the 'crontab' command to enter cron jobs. If you're editing the crontab file directly yourself then cron may not know about the changes for up to 24 hours and therefore the job(s) won't run. Otherwise restart the cron daemon from the command line to alert it of the changes.
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I want to add these no. these are in the format of
days:hours:minutes:sec
I want result in this format only
0:00:04:59
0:00:00:12
0:00:00:28
0:00:00:03
0:01:29:35
0:00:00:19
0:01:05:21
Is any body ca help me?????
To get This..
Thanks
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CRON(8) System Manager's Manual CRON(8)
NAME
cron - daemon to execute scheduled commands (Vixie Cron)
SYNOPSIS
cron
DESCRIPTION
Cron should be started from /etc/rc or /etc/rc.local. It will return immediately, so you don't need to start it with '&'.
Cron searches /var/spool/cron for crontab files which are named after accounts in /etc/passwd; crontabs found are loaded into memory. Cron
also searches for /etc/crontab and the files in the /etc/cron.d/ directory, which are in a different format (see crontab(5)). Cron then
wakes up every minute, examining all stored crontabs, checking each command to see if it should be run in the current minute. When execut-
ing commands, any output is mailed to the owner of the crontab (or to the user named in the MAILTO environment variable in the crontab, if
such exists).
Additionally, cron checks each minute to see if its spool directory's modtime (or the modtime on /etc/crontab) has changed, and if it has,
cron will then examine the modtime on all crontabs and reload those which have changed. Thus cron need not be restarted whenever a crontab
file is modified. Note that the Crontab(1) command updates the modtime of the spool directory whenever it changes a crontab.
SEE ALSO
crontab(1), crontab(5)
AUTHOR
Paul Vixie <paul@vix.com>
4th Berkeley Distribution 20 December 1993 CRON(8)