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Full Discussion: How to schedule a job
Top Forums UNIX for Advanced & Expert Users How to schedule a job Post 84172 by zazzybob on Thursday 22nd of September 2005 07:53:42 AM
Old 09-22-2005
Quote:
Originally Posted by sanjustudy
hai ,

go to /etc
open crontab

specify
* * * * * roots /a/b/c/program name
the stars will be
1. minutes
2.hours.
3.day of the week
4.day of the month
5.month of the year

according what u specfied u can run the job

Smilie
Hmm... lots of incorrect and/or misleading information here.

Firstly, this is the system crontab (under Linux) - as can be seen by the additional field between the scheduling fields, and the command field. This field contains the username of the user as which the command is to run. Now, in this case, I assume the user "roots" is a standard user? If you're refering to the superuser, then the correct username is "root". Also, the ordering of the fields as you've described is way off.

1. minutes
2. hours
3. day of month
4. month
5. day of week

Is the correct ordering of the scheduling fields. Before posting a reply, check that it's correct. If you have any doubts, check the crontab manual page....

Cheers
ZB
 

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DATE(1) 						      General Commands Manual							   DATE(1)

NAME
date - print or set the date and time SYNOPSIS
date [-qsu] [[MMDDYY]hhmm[ss]] [+format] OPTIONS
-q Read the date from stdin -s Set the time (implicit for -q or a date string) -u Print the date as GMT -t Use this number of seconds instead of current time EXAMPLES
date # Print the date and time date 0221921610 # Set date to Feb 21, 1992 at 4:10 p.m. DESCRIPTION
With the -q flag or a numeric argument, date sets the GMT time and date. MMDDYY refers to the month, day, and year; hhmmss refers to the hour, minute and second. Each of the six fields must be exactly two digits, no more and no less. date always display the date and time, with the default format for the system. The -u flag request GMT time instead of local time. A format may be specified with a + followed by a printf-like string with the following options: %% % character %A Name of the day %B Name of the month %D mm/dd/yy %H Decimal hour on 2 digits %I Decimal hour modulo 12 on 2 digits %M Decimal minute on 2 digits %S Decimal seconds on 2 digits %T HH:MM:SS %U Decimal week number, Sunday being first day of week %W Decimal week number, Monday being first day of week %X Same as %T %Y Decimal year on 4 digits %Z Time Zone (if any) %a Abbreviated name of the day %b Abbreviated name of the month %c Appropriate date & time (default format) %d Decimal day of the month on 2 digits %e Same as %d, but a space replaces leading 0 %h Same as %b %j Decimal dey of the year on 3 digits %m Decimal month on 2 digits %n Newline character %p AM or PM %r 12-hour clock time with AM/PM %s Number of seconds since the epoch %t Tab character %w Decimal day of the week (0=Sunday) %x Same as %D %y Decimal year on 2 digits SEE ALSO
time(2), ctime(3), readclock(8). DATE(1)
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