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Top Forums UNIX for Dummies Questions & Answers Crontab First Monday of Month only Post 8228 by punter5 on Monday 8th of October 2001 06:18:49 PM
Old 10-08-2001
I must first say that I am fairly new to Unix and know very little about cronjobs, but your question intrigued me. My first question to you would be what OS are you using? The majority of my experience is with Solaris 7, so I will be speaking in terms of that.

I read the man pages on crontab and found the six fields that make up the crontab entry format:

1. Minute (0-59)
2. Hour (0-23)
3. Day of the Month (1-31)
4. Month of the Year (1-12)
5. Day of the Week (0-6) 0 being Sunday.
6. the executable string

So say you want to run your cronjob at midnight on the first Monday of ever month, it appears that the first 5 fields should look something like this:

0 0 1-7 * 1

My thinking:

0 - Is the first minute of that day
0 - Is the first hour of that day
1-7 - The first Monday has to fall within the first seven days of the month.
* - Every month
1 - Only on Mondays

Unless I am misreading the man pages, it seems like this should work. I am going to attempt to set up a cronjob and test it.

Best regards.
 

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holidays(4)							   File Formats 						       holidays(4)

NAME
holidays - prime/nonprime table for the accounting system SYNOPSIS
/etc/acct/holidays DESCRIPTION
The /etc/acct/holidays file describes which hours are considered prime time and which days are holidays. Holidays and weekends are con- sidered non-prime time hours. /etc/acct/holidays is used by the accounting system. All lines beginning with an "*" are comments. The /etc/acct/holidays file consists of two sections. The first non-comment line defines the current year and the start time of prime and non-prime time hours, in the form: current_year prime_start non_prime_start The remaining non-comment lines define the holidays in the form: month/day company_holiday Of these two fields, only the month/day is actually used by the accounting system programs. The /etc/acct/holidays file must be updated each year. EXAMPLES
Example 1: Example of the /etc/acct/holidays file. The following is an example of the /etc/acct/holidays file: * Prime/Nonprime Table for the accounting system * * Curr Prime Non-Prime * Year Start Start * 1991 0830 1800 * * only the first column (month/day) is significant. * * month/day Company Holiday * 1/1 New Years Day 5/30 Memorial Day 7/4 Indep. Day 9/5 Labor Day 11/24 Thanksgiving Day 11/25 day after Thanksgiving 12/25 Christmas 12/26 day after Christmas SEE ALSO
acct(1M) SunOS 5.10 28 Mar 1991 holidays(4)
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