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Full Discussion: crontab questions
Top Forums UNIX for Dummies Questions & Answers crontab questions Post 302339509 by Corona688 on Thursday 30th of July 2009 04:57:16 PM
Old 07-30-2009
They both work. /etc/cron.daily is just a convenience thing, a place to dump scripts you want to run daily. They're also easily automated -- a software installer could dump a file into /etc/cron.daily and expect it to get run at regular intervals without further ado. It also means not having to edit root's cron table or the system cron table for trivial things, which is good since the fewer opportunities to introduce mistakes the better.

cron tables have some advantages though. You can schedule precise times, not just some arbitrary 'daily'. And they're available to users, not just root -- users in the cron group, at least. User crontables get run with that user's permissions.
 

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LEARN ABOUT CENTOS

sa2

SA2(8)								Linux User's Manual							    SA2(8)

NAME

       sa2 - Write a daily report in the /var/log/sa directory.

SYNOPSIS

       /usr/lib64/sa/sa2

DESCRIPTION

       The  sa2  command  is  a shell procedure variant of the sar command which writes a daily report in the /var/log/sa/sardd file, where the dd
       parameter indicates the current day. The sa2 command handles all of the flags and parameters of the sar command.

       The sa2 command is designed to be started automatically by the cron command.

EXAMPLES

       To run the sa2 command daily, place the following entry in your root or adm crontab file:

       5 19 * * 1-5 /usr/lib64/sa/sa2 -A &

       This will generate a daily report called /var/log/sa/sardd It will also remove reports more than one week old.

FILES

       /var/log/sa/sardd
	      Indicate the daily report file, where the dd parameter is a number representing the day of the month.

AUTHOR

       Sebastien Godard (sysstat <at> orange.fr)

SEE ALSO

       sar(1), sadc(8), sa1(8), sadf(1)

       http://pagesperso-orange.fr/sebastien.godard/

Linux								    AUGUST 2010 							    SA2(8)
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